diff --git a/.github/issue_template.md b/.github/issue_template.md
deleted file mode 100644
index 1e37507c3..000000000
--- a/.github/issue_template.md
+++ /dev/null
@@ -1,23 +0,0 @@
-<!-- Thank you for opening an issue! If your issue is about a question, or a
-suggestion, please replace all of the content between curly brackets, {like so},
-by the appropriate information. If your issue is a more technical point, or a
-suggestion for improvement, feel free to remove all of this and just write as
-usual. -->
-
-{short description of the problem}
-
-{what you were trying to do}
-
-```julia
-# Please put the relevant code here
-```
-
-{what you expected to see}
-
-{what you got instead}
-
----
-
-Using {operating system}, Julia {version}, EcologicalNetwork {version}
-
-{any additional information}
diff --git a/README.md b/README.md
index 58e60f32a..4adf3b9d4 100644
--- a/README.md
+++ b/README.md
@@ -1,18 +1,16 @@
 # EcologicalNetworks.jl
 
-This `julia` package provides a common interface to analyze all types of data on
-ecological networks. It is designed to be general, easy to expand, and work on
-bipartite/unipartite as well as deterministic/quantitative/probabilistic
+This `julia` package provides a common interface to analyze all types of data
+on ecological networks. It is designed to be general, easy to expand, and work
+on bipartite/unipartite as well as deterministic/quantitative/probabilistic
 networks. The current version is compatible with `julia` version 1.0 and 0.7.
 
 [![](https://img.shields.io/badge/docs-stable-blue.svg)](https://PoisotLab.github.io/EcologicalNetworks.jl/stable)
-[![](https://img.shields.io/badge/docs-latest-blue.svg)](https://PoisotLab.github.io/EcologicalNetworks.jl/latest)
+[![](https://img.shields.io/badge/docs-dev-orange.svg)](https://PoisotLab.github.io/EcologicalNetworks.jl/dev)
 [![Join the chat at https://gitter.im/PoisotLab/EcologicalNetworks.jl](https://badges.gitter.im/PoisotLab/EcologicalNetworks.jl.svg)](https://gitter.im/PoisotLab/EcologicalNetworks.jl?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
-[![Waffle.io - Columns and their card count](https://badge.waffle.io/PoisotLab/EcologicalNetworks.jl.svg?columns=all)](https://waffle.io/PoisotLab/EcologicalNetworks.jl)
-
 There is a short bibliography of the methods in the [package
-documentation][pdocref].
+documentation][pdocref], and in the documentations of each function.
 
 [pdocref]: http://poisotlab.io/EcologicalNetworks.jl/latest/#references
 
@@ -24,8 +22,14 @@ Install (from the package mode):
 add EcologicalNetworks
 ~~~
 
+Optionally, if you want to visualize networks, install
+
+```
+add EcologicalNetworksPlots
+```
+
 That's it. Now head over to the
-[documentation](http://poisotlab.io/EcologicalNetworks.jl/stable/).
+[documentation](http://PoisotLab.github.io/EcologicalNetworks.jl/stable/).
 
 ## How's the code doing?
 
diff --git a/data/pajek/ChesLower.paj b/data/pajek/ChesLower.paj
new file mode 100644
index 000000000..7e6876d1f
--- /dev/null
+++ b/data/pajek/ChesLower.paj
@@ -0,0 +1,306 @@
+% Web 46 Lower Chesapeake Bay in Summer; Hagy 2001; mgC/m2/summer
+% from datall.zip from http://www.cbl.cees.edu/~ulan/ntwk/network.html
+% Lower Chesapeake Bay in Summer
+% Hagy, J.D. 2002. Eutrophication, hypoxia and trophic transfer
+% efficiency in Chesapeake Bay PhD Dissertation, University of Maryland
+% at College Park (USA), 446 pp.
+% transformed from SCOR format by Scor2net 15.7.2003
+*partition ECO types / ChesLower
+*vertices 37
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+2
+2
+2
+3
+4
+5
+
+*network ChesLower
+*vertices 37
+   1 "Net Phytoplankton"
+   2 "Picoplankton"
+   3 "Free Bacteria"
+   4 "Particle Attached Bacteria"
+   5 "Heteroflagellates"
+   6 "Ciliates"
+   7 "Rotifers"
+   8 "Meroplankton"
+   9 "Mesozooplankton"
+  10 "Ctenophores"
+  11 "Chrysaora"
+  12 "Microphytobenthos"
+  13 "SAV"
+  14 "Benthic Bacteria"
+  15 "Meiofauna"
+  16 "Deposit Feeding Benthos"
+  17 "Suspension Feeding Benthos"
+  18 "Oysters"
+  19 "Blue Crab"
+  20 "Menhaden"
+  21 "Bay anchovy"
+  22 "Herrings and Shads"
+  23 "White Perch"
+  24 "Spot"
+  25 "Croaker"
+  26 "Hogchoker"
+  27 "American eel"
+  28 "Catfish"
+  29 "Striped Bass"
+  30 "Bluefish"
+  31 "Weakfish"
+  32 "DOC"
+  33 "Sediment POC"
+  34 "POC"
+  35 "Input"
+  36 "Output"
+  37 "Respiration"
+*arcs
+  35   1 195627.300
+  35   2  47744.870
+  35  12  26965.840
+  35  13   1644.408
+  35  18      0.0000001
+  35  19     12.880
+  35  22      0.0000001
+  35  23      0.0000001
+  35  24     11.040
+  35  27      0.0000001
+  35  28      0.0000001
+  35  32  18400.000
+  35  33  20792.000
+  18  36      0.0000001
+  19  36    100.280
+  20  36   2815.200
+  21  36    497.720
+  22  36      0.0000001
+  23  36      0.0000001
+  24  36     23.184
+  25  36     11.960
+  28  36      0.0000001
+  27  36      0.0000001
+  29  36     22.080
+  30  36     21.160
+  31  36    133.216
+  32  36   1528.560
+  33  36  11336.000
+  34  36      0.000
+   1  37  38824.000
+   2  37   8556.000
+   3  37 106477.100
+   4  37   5884.320
+   5  37   8582.128
+   6  37  11605.800
+   7  37      0.000
+   8  37   1754.992
+   9  37   8440.264
+  10  37    741.244
+  11  37      0.000
+  12  37   5428.000
+  13  37      0.000
+  14  37  53433.600
+  15  37   4508.000
+  16  37   7899.948
+  17  37  13450.580
+  18  37      0.000
+  19  37     93.104
+  20  37  12183.740
+  21  37   3280.904
+  22  37      0.000
+  23  37      0.000
+  24  37    759.368
+  25  37    314.364
+  26  37    945.760
+  27  37      0.000
+  28  37      0.000
+  29  37    299.092
+  30  37    324.576
+  31  37    922.116
+  32  37      0.000
+  33  37      0.000
+  34  37      0.000
+   1   6  16008.000
+   1   7      0.092
+   1   8   3502.992
+   1   9  33115.210
+   1  17  25556.130
+   1  20  17686.080
+   1  32  48747.860
+   1  34  12186.960
+   2   6   8004.000
+   2   8    408.664
+   2   9   4213.416
+   2  17   1345.040
+   2  32  20174.130
+   2  34   5043.532
+   3   5  37305.080
+   3   6   8004.000
+   3  32  18380.130
+   3  34   4595.032
+   4  17   2241.764
+   4  32   1220.472
+   4  34    305.164
+   5   6   8004.000
+   5  32  16575.180
+   5  34   4143.772
+   6   8   1342.832
+   6   9  13848.210
+   6  21    510.048
+   6  32  10170.510
+   6  34   2542.604
+   8  10     65.596
+   8  20    491.280
+   8  21    714.012
+   8  32   1406.220
+   8  34   1406.220
+   9   9   3023.396
+   9  10   3213.284
+   9  20    491.280
+   9  21   8670.080
+   9  32  18189.230
+   9  34  18189.230
+  10  11      0.092
+  10  32   1268.772
+  10  34   1268.772
+  12  15   9016.000
+  12  16   5266.632
+  12  32   3627.652
+  12  33   3627.652
+  13  33   1644.408
+  14  15   4508.000
+  14  16   3950.020
+  14  32   7206.636
+  14  33   7206.636
+  15  16   3950.020
+  15  19     18.860
+  15  24     94.392
+  15  25     39.100
+  15  26    193.200
+  15  33   9228.520
+  16  19    188.784
+  16  24   1132.704
+  16  25    469.016
+  16  26    676.200
+  16  29     39.560
+  16  31     65.964
+  16  32   3172.160
+  16  33  12688.820
+  17  19     94.392
+  17  24    660.744
+  17  25    273.608
+  17  26   1062.600
+  17  29     19.780
+  17  31     65.964
+  17  32   5841.540
+  17  33  23366.070
+  19  29     19.780
+  19  33    177.284
+  20  29    197.800
+  20  30     35.512
+  20  31    594.044
+  20  32    764.980
+  20  33   2294.940
+  20  34    764.980
+  21  29     79.120
+  21  30    137.724
+  21  31    197.984
+  21  33   4805.344
+  21  34   1201.336
+  24  29     39.560
+  24  30     66.608
+  24  31    395.968
+  24  32    307.096
+  24  34    307.096
+  25  30    204.332
+  25  32    125.488
+  25  34    125.488
+  26  32    493.120
+  26  34    493.120
+  29  32     37.260
+  29  34     37.260
+  30  32     49.220
+  30  34     49.220
+  31  32    132.296
+  31  34    132.296
+  32   3 174761.400
+  33  14  76304.800
+  33  15   4508.000
+  33  16  13166.580
+  33  19     75.532
+  34   4   9651.720
+  34   8    583.832
+  34   9   6016.524
+  34  17  15692.350
+  34  20    982.560
+  34  21    305.992
+  34  33  19559.200
+
+*vector bio-masses / ChesLower
+*vertices 37
+  2112.000
+   373.000
+  1258.000
+    39.000
+    43.000
+    87.000
+     0.001
+    38.000
+  1073.000
+   108.000
+     0.001
+   293.000
+  1986.000
+   220.000
+   700.000
+  4089.000
+  6962.000
+     0.001
+   342.000
+  2136.000
+   381.000
+     0.001
+     0.001
+   570.000
+   236.000
+   100.000
+     0.001
+     0.001
+   172.000
+    68.000
+   211.000
+ 26915.000
+ 76080.000
+  8309.000
+     0.000
+     0.000
+     0.000
+
diff --git a/data/pajek/ChesMiddle.paj b/data/pajek/ChesMiddle.paj
new file mode 100644
index 000000000..dc1298093
--- /dev/null
+++ b/data/pajek/ChesMiddle.paj
@@ -0,0 +1,337 @@
+% Web 45 Middle Chesapeake Bay in Summer; Hagy 2001; mgC/m2/summer
+% from datall.zip from http://www.cbl.cees.edu/~ulan/ntwk/network.html
+% Middle Chesapeake Bay in Summer
+% Hagy, J.D. 2002. Eutrophication, hypoxia and trophic transfer
+% efficiency in Chesapeake Bay PhD Dissertation, University of Maryland
+% at College Park (USA), 446 pp.
+% transformed from SCOR format by Scor2net 15.7.2003
+*partition ECO types / ChesMiddle
+*vertices 37
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+2
+2
+2
+3
+4
+5
+
+*network ChesMiddle
+*vertices 37
+   1 "Net Phytoplankton"
+   2 "Picoplankton"
+   3 "Free Bacteria"
+   4 "Particle Attached Bacteria"
+   5 "Heteroflagellates"
+   6 "Ciliates"
+   7 "Rotifers"
+   8 "Meroplankton"
+   9 "Mesozooplankton"
+  10 "Ctenophores"
+  11 "Chrysaora"
+  12 "Microphytobenthos"
+  13 "SAV"
+  14 "Benthic Bacteria"
+  15 "Meiofauna"
+  16 "Deposit Feeding Benthos"
+  17 "Suspension Feeding Benthos"
+  18 "Oysters"
+  19 "Blue Crab"
+  20 "Menhaden"
+  21 "Bay anchovy"
+  22 "Herrings and Shads"
+  23 "White Perch"
+  24 "Spot"
+  25 "Croaker"
+  26 "Hogchoker"
+  27 "American eel"
+  28 "Catfish"
+  29 "Striped Bass"
+  30 "Bluefish"
+  31 "Weakfish"
+  32 "DOC"
+  33 "Sediment POC"
+  34 "POC"
+  35 "Input"
+  36 "Output"
+  37 "Respiration"
+*arcs
+  35   1 241715.300
+  35   2  60507.480
+  35  12  19504.000
+  35  13   1616.256
+  35  16    506.000
+  35  17    207.000
+  35  18      0.0000001
+  35  19    115.000
+  35  22      0.0000001
+  35  27      0.552
+  35  33  55200.000
+  18  36      0.0000001
+  19  36    192.280
+  20  36   4416.000
+  21  36    497.720
+  22  36      0.0000001
+  24  36      3.680
+  25  36      2.760
+  27  36      2.944
+  28  36      1.748
+  29  36     22.080
+  30  36     18.952
+  31  36     42.136
+  32  36    703.000
+  33  36   1105.100
+  34  36      0.0781000
+   1  37  61180.000
+   2  37  13524.000
+   3  37 131086.200
+   4  37   7589.080
+   5  37  25222.720
+   6  37  19638.230
+   7  37    634.800
+   8  37    831.312
+   9  37   8008.876
+  10  37    864.800
+  11  37     24.380
+  12  37   4876.000
+  13  37      0.000
+  14  37  72378.240
+  15  37   3181.360
+  16  37   1942.580
+  17  37    793.960
+  18  37      0.000
+  19  37    106.168
+  20  37  14354.390
+  21  37   4239.636
+  22  37      0.000
+  23  37      8.738
+  24  37    295.780
+  25  37    301.024
+  26  37    354.200
+  27  37      3.680
+  28  37      6.440
+  29  37    299.092
+  30  37    324.576
+  31  37    292.836
+  32  37      0.000
+  33  37      0.000
+  34  37      0.000
+   1   6  26993.900
+   1   7   1481.200
+   1   8   1645.512
+   1   9  34839.850
+   1  17   1469.884
+   1  20  17686.080
+   1  32  48209.470
+   1  34  48209.470
+   2   6  13496.950
+   2   7    105.800
+   2   8    138.276
+   2   9   2927.716
+   2  17    133.584
+   2  32  24144.940
+   2  34   6036.212
+   3   5 109664.000
+   3   6  13496.950
+   3  32   3962.624
+   3  34   3962.624
+   4  17    133.584
+   4  32   5218.792
+   4  34   2236.612
+   5   6  13496.950
+   5   7    105.800
+   5  32  49586.990
+   5  34  21251.540
+   6   7    423.200
+   6   8    691.380
+   6   9  14638.580
+   6  21    510.048
+   6  32  15791.710
+   6  34  15791.710
+   7   8     13.800
+   7   9    292.744
+   7  21     50.968
+   7  32    561.844
+   7  34    561.844
+   8  10     76.544
+   8  21    663.044
+   8  32    597.356
+   8  34    597.356
+   9   8    138.276
+   9   9   2927.716
+   9  10   3672.364
+   9  11     17.940
+   9  20    982.560
+   9  21   8670.080
+   9  23      0.920
+   9  32  17067.750
+   9  34  17067.750
+  10  11    323.380
+  10  32   1318.636
+  10  34   1318.636
+  11  32    167.532
+  11  34    167.532
+  12  15   6362.720
+  12  16    653.844
+  12  32   3805.764
+  12  33   3805.764
+  13  33   1616.256
+  14  15   3181.360
+  14  16    653.844
+  14  32  13572.480
+  14  33  13572.480
+  15  16   1961.532
+  15  19     43.056
+  15  24     73.508
+  15  25     74.888
+  15  26     69.000
+  15  33   7322.096
+  16  19    129.168
+  16  23      5.796
+  16  24    441.140
+  16  25    449.144
+  16  26    414.000
+  16  27      4.600
+  16  28      4.876
+  16  29     39.560
+  16  31     33.488
+  16  32    716.036
+  16  33   2864.144
+  17  19    172.224
+  17  23      5.796
+  17  24    147.016
+  17  25    149.684
+  17  26    138.000
+  17  27      4.600
+  17  28      6.440
+  17  29     19.780
+  17  31     33.488
+  17  32    281.704
+  17  33   1126.724
+  19  19     43.056
+  19  29     19.780
+  19  33    184.276
+  20  29    197.800
+  20  30     35.512
+  20  31    104.788
+  20  33    542.708
+  21  10     76.544
+  21  11     17.940
+  21  23      4.784
+  21  28      1.656
+  21  29     79.120
+  21  30    137.724
+  21  31    155.112
+  21  32   2494.948
+  21  34   2494.948
+  23  32      5.244
+  23  34      5.244
+  24  28      1.656
+  24  29     39.560
+  24  30     66.608
+  24  31     92.184
+  24  32    117.944
+  24  34    117.944
+  25  30    204.332
+  25  32    120.060
+  25  34    120.060
+  26  32    167.900
+  26  34    167.900
+  27  32      1.472
+  27  34      1.472
+  28  32      4.048
+  28  34      4.048
+  29  32     37.260
+  29  34     37.260
+  30  32     50.324
+  30  34     50.324
+  31  32     42.136
+  31  34     42.136
+  32   3 262172.400
+  33  14 103358.300
+  33  15   3181.360
+  33  16   3269.220
+  33  19     43.056
+  33  23      1.932
+  33  24     73.508
+  33  25     74.888
+  33  26     69.000
+  33  28      1.656
+  34   4  15178.160
+  34   8    138.276
+  34   9   2927.716
+  34  17    935.364
+  34  20    982.560
+  34  21    305.992
+  34  32  74830.870
+  34  33  24943.590
+
+*vector bio-masses / ChesMiddle
+*vertices 37
+  3326.000
+   587.000
+  2415.000
+    73.000
+   149.000
+   147.000
+    23.000
+    18.000
+   526.000
+   126.000
+     6.300
+   265.000
+  1952.000
+   298.000
+   494.000
+  1030.000
+   421.000
+     0.001
+   390.000
+  2136.000
+   381.000
+     0.001
+    29.000
+   222.000
+   226.000
+    50.000
+     9.000
+    45.000
+   172.000
+    68.000
+    67.000
+ 28207.000
+201607.000
+ 10324.000
+     0.000
+     0.000
+     0.000
+
diff --git a/data/pajek/ChesUpper.paj b/data/pajek/ChesUpper.paj
new file mode 100644
index 000000000..b23af47c8
--- /dev/null
+++ b/data/pajek/ChesUpper.paj
@@ -0,0 +1,343 @@
+% Web 44 Upper Chesapeake Bay in Summer; Hagy 2001; mgC/m2/summer
+% from datall.zip from http://www.cbl.cees.edu/~ulan/ntwk/network.html
+% Upper Chesapeake Bay in Summer
+% Hagy, J.D. 2002. Eutrophication, hypoxia and trophic transfer
+% efficiency in Chesapeake Bay PhD Dissertation, University of Maryland
+% at College Park (USA), 446 pp.
+% transformed from SCOR format by Scor2net 15.7.2003
+*partition ECO types / ChesUpper
+*vertices 37
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+2
+2
+2
+3
+4
+5
+
+*network ChesUpper
+*vertices 37
+   1 "Net Phytoplankton"
+   2 "Picoplankton"
+   3 "Free Bacteria"
+   4 "Particle Attached Bacteria"
+   5 "Heteroflagellates"
+   6 "Ciliates"
+   7 "Rotifers"
+   8 "Meroplankton"
+   9 "Mesozooplankton"
+  10 "Ctenophores"
+  11 "Chrysaora"
+  12 "Microphytobenthos"
+  13 "SAV"
+  14 "Benthic Bacteria"
+  15 "Meiofauna"
+  16 "Deposit Feeding Benthos"
+  17 "Suspension Feeding Benthos"
+  18 "Oysters"
+  19 "Blue Crab"
+  20 "Menhaden"
+  21 "Bay anchovy"
+  22 "Herrings and Shads"
+  23 "White Perch"
+  24 "Spot"
+  25 "Croaker"
+  26 "Hogchoker"
+  27 "American Eel"
+  28 "Catfish"
+  29 "Striped Bass"
+  30 "Bluefish"
+  31 "Weakfish"
+  32 "DOC"
+  33 "Sediment POC"
+  34 "POC"
+  35 "Input"
+  36 "Output"
+  37 "Respiration"
+*arcs
+  35   1  91050.560
+  35   2  22670.640
+  35  12  21564.800
+  35  13   1535.296
+  35  18      0.0000001
+  35  19     11.960
+  35  27      2.024
+  35  32     88.000
+  35  33  24288.000
+  35  34   9731.000
+  18  36      0.0000001
+  19  36    167.440
+  20  36   4416.000
+  21  36    368.000
+  23  36     12.880
+  28  36     16.560
+  27  36     11.592
+  29  36     22.080
+  30  36     19.320
+  31  36     42.320
+  32  36      0.0000000
+  33  36      0.0000000
+  34  36      0.0000000
+   1  37  24932.000
+   2  37   5520.000
+   3  37  42392.680
+   4  37   3444.480
+   5  37   5987.544
+   6  37   8804.400
+   7  37    386.400
+   8  37    147.752
+   9  37   3126.252
+  10  37    110.768
+  11  37      0.0000000
+  12  37   5391.200
+  13  37      0.0000000
+  14  37   7286.400
+  15  37   4508.000
+  16  37   4574.976
+  17  37  31316.800
+  18  37      0.0000000
+  19  37    166.152
+  20  37  12183.740
+  21  37   3193.688
+  22  37    282.440
+  23  37     75.164
+  24  37    259.808
+  25  37     66.608
+  26  37    708.400
+  27  37     14.444
+  28  37     65.412
+  29  37    299.092
+  30  37    324.576
+  31  37    292.836
+  32  37      0.0000000
+  33  37      0.0000000
+  34  37      0.0000000
+   1   6  15180.000
+   1   7    966.000
+   1   8    240.948
+   1   9  10978.180
+   1  17  20543.780
+   1  20  17686.080
+   1  32    418.876
+   1  33     52.348
+   1  34     52.348
+   2   6   3036.000
+   2   7    128.800
+   2   8     49.128
+   2   9   2360.904
+   2  17   5135.992
+   2  32   5151.816
+   2  34   1288.000
+   3   5  26026.800
+   3   6   6072.000
+   3  32     71.760
+   3  34     71.760
+   4  17   2054.360
+   4  32    264.500
+   4  34    264.500
+   5   6   6072.000
+   5   7     64.400
+   5  32   6951.428
+   5  34   6951.428
+   6   7    128.800
+   6   8    172.040
+   6   9   8263.164
+   6  21    384.192
+   6  22     35.144
+   6  32   6286.176
+   6  34   6286.176
+   7   8      4.876
+   7   9    118.036
+   7  21     76.820
+   7  22      6.992
+   7  32    347.392
+   7  34    347.392
+   8  10     10.672
+   8  21     76.820
+   8  22      6.992
+   8  32    124.660
+   8  34    124.660
+   9   9    708.308
+   9  10    510.508
+   9  20    982.560
+   9  21   6915.180
+   9  22    631.948
+   9  23      9.384
+   9  32   5362.496
+   9  34   5362.496
+  10  11      0.092
+  10  32    210.496
+  10  34    210.496
+  12  15   9016.000
+  12  16   3812.480
+  12  32   1672.560
+  12  33   1672.560
+  13  33   1535.296
+  14  15   1803.200
+  14  16    762.496
+  14  33    553.104
+  15  16   3812.480
+  15  19     67.344
+  15  23     18.676
+  15  24     64.584
+  15  25     16.560
+  15  33   9544.356
+  16  19     67.344
+  16  23     37.352
+  16  24    258.336
+  16  25     66.240
+  16  26    552.000
+  16  27     17.756
+  16  29     19.780
+  16  31     33.488
+  16  33   8660.420
+  16  34    962.228
+  17  19    404.064
+  17  23     56.028
+  17  24    258.336
+  17  25     66.240
+  17  26    690.000
+  17  27     17.756
+  17  28    114.172
+  17  29     19.780
+  17  31     33.488
+  17  32  34871.220
+  17  34  34871.220
+  19  29     19.780
+  19  32    166.060
+  19  34    166.060
+  20  29    197.800
+  20  30     88.872
+  20  31     67.068
+  20  32   1348.904
+  20  34   1348.904
+  21  10     10.672
+  21  19     67.344
+  21  23     46.736
+  21  28     32.660
+  21  29     59.340
+  21  30    133.216
+  21  31    159.252
+  21  32   1806.328
+  21  34   1806.328
+  22  29     39.560
+  22  30    111.044
+  22  31     20.976
+  22  32    124.108
+  22  34    124.108
+  23  29     11.868
+  23  31     20.976
+  23  32     32.936
+  23  34     32.936
+  24  29     19.780
+  24  30     88.872
+  24  31     62.836
+  24  32    107.272
+  24  34    107.272
+  25  30     22.172
+  25  32     38.364
+  25  34     38.364
+  26  29      7.912
+  26  31     20.976
+  26  32    321.356
+  26  34    321.356
+  27  32      5.704
+  27  34      5.704
+  28  32     40.388
+  28  34     40.388
+  29  32     37.260
+  29  34     37.260
+  30  32     50.324
+  30  34     50.324
+  31  32     42.136
+  31  34     42.136
+  32   3  74635.000
+  33  14  10405.200
+  33  15   7212.800
+  33  16   6862.464
+  33  19     67.344
+  33  28     16.284
+  33  32   8696.760
+  33  34  13045.140
+  34   4   6027.840
+  34   8     24.564
+  34   9   1180.452
+  34  17  74984.970
+  34  20    982.560
+  34  21    230.552
+  34  22     21.068
+  34  23     18.676
+  34  24     64.584
+  34  25     16.560
+  34  26    138.000
+
+*vector bio-masses / ChesUpper
+*vertices 37
+  1356.000
+   239.000
+   649.000
+    36.000
+    30.000
+    66.000
+    14.000
+     3.200
+   282.000
+    17.000
+     0.001
+   293.000
+  2086.000
+    30.000
+   700.000
+  2368.000
+ 27232.000
+     0.001
+   610.000
+  2136.000
+   287.000
+   212.000
+   282.000
+   195.000
+    50.000
+   100.000
+    35.000
+   450.000
+   172.000
+    68.000
+    67.000
+ 12504.000
+201670.000
+  5249.000
+     0.000
+     0.000
+     0.000
+
diff --git a/data/pajek/Chesapeake.paj b/data/pajek/Chesapeake.paj
new file mode 100644
index 000000000..95d48f1bb
--- /dev/null
+++ b/data/pajek/Chesapeake.paj
@@ -0,0 +1,310 @@
+% Web 34 Chesapeake Bay Mesohaline Network; D. Baird; Umcees Ref No. XXX-86; MGC/M2/SUM 1
+% from datall.zip from http://www.cbl.cees.edu/~ulan/ntwk/network.html
+% Chesapeake Bay mesohaline ecosystem. Summer carbon flows.
+% Baird, D. and R.E. Ulanowicz. 1989. The seasonal dynamics of the
+% Chesapeake Bay ecosystem. Ecol. Monogr. 59: 329-364.
+% transformed from SCOR format by Scor2net 15.7.2003
+*partition ECO types / chesapeake
+*vertices 39
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+2
+2
+2
+3
+4
+5
+
+*network chesapeake
+*vertices 39
+   1 "phytoplankton"
+   2 "bacteria in suspended poc"
+   3 "bacteria in sediment poc"
+   4 "benthic diatoms"
+   5 "free bacteria"
+   6 "heterotrophic microflagel"
+   7 "ciliates"
+   8 "zooplankton"
+   9 "ctenophores"
+  10 "sea nettle"
+  11 "other suspension feeders"
+  12 "mya arenaria"
+  13 "oysters"
+  14 "other polychaetes"
+  15 "nereis"
+  16 "macoma spp."
+  17 "meiofauna"
+  18 "crustacean deposit feeder"
+  19 "blue crab"
+  20 "fish larvae"
+  21 "alewife & blue herring"
+  22 "bay anchovy"
+  23 "menhaden"
+  24 "shad"
+  25 "croaker"
+  26 "hogchoker"
+  27 "spot"
+  28 "white perch"
+  29 "catfish"
+  30 "bluefish"
+  31 "weakfish"
+  32 "summer flounder"
+  33 "striped bass"
+  34 "dissolved organic carbon"
+  35 "suspended particulate org"
+  36 "sediment particulate orga"
+  37 "Input"
+  38 "Output"
+  39 "Respiration"
+*arcs
+  37   1 522650.0000000
+  37   4  77803.0000000
+  37  34 103188.0000000
+  37  35 185150.4000000
+   8  38  18720.2400000
+  12  38    533.1050000
+  13  38   3133.6600000
+  19  38   1325.1570000
+  20  38      0.9376155
+  21  38      4.0630230
+  22  38     96.1815900
+  23  38      7.6839110
+  24  38      0.9376006
+  25  38      1.3343430
+  26  38     12.2117700
+  27  38     55.7901100
+  28  38     19.4779300
+  29  38     28.5216700
+  30  38      2.3624590
+  31  38      8.3364240
+  32  38      4.2375820
+  33  38      4.6160970
+   1  39 239556.2000000
+   2  39  15419.4500000
+   3  39 277306.4000000
+   4  39  27832.0000000
+   5  39  84148.4300000
+   6  39  45766.6300000
+   7  39  37288.1000000
+   8  39  40631.3000000
+   9  39   6698.6920000
+  10  39   1119.4060000
+  11  39   3455.9330000
+  12  39   1930.2800000
+  13  39   3243.6310000
+  14  39  19939.5200000
+  15  39   1400.1850000
+  16  39  24477.1700000
+  17  39  21384.0300000
+  18  39   7624.7390000
+  19  39   4297.8520000
+  20  39      0.6251083
+  21  39      8.7511260
+  22  39    761.7415000
+  23  39    226.8830000
+  24  39      1.6669600
+  25  39      2.5852990
+  26  39     26.8146500
+  27  39    129.3927000
+  28  39     41.0061700
+  29  39     58.7946700
+  30  39      4.9066550
+  31  39     31.5742200
+  32  39      8.4751750
+  33  39     10.1554200
+   1   7  33671.4500000
+   1   8  39440.6700000
+   1  11   4458.0310000
+   1  12   2415.3420000
+   1  13   4687.3550000
+   1  22    294.0877000
+   1  23     22.0831200
+   1  34  78834.6300000
+   1  35 119270.1000000
+   2   7   1443.3160000
+   2   8   1131.0060000
+   2   9    124.1849000
+   2  11    158.4640000
+   2  12     71.0214200
+   2  13    109.9190000
+   2  22     13.3421800
+   2  23      5.1316060
+   2  35   4179.1800000
+   2  36   9915.2890000
+   3  14 134896.3000000
+   3  15  21021.1000000
+   3  16  48089.0900000
+   3  17  30162.7400000
+   3  18  11805.2400000
+   3  36 100313.7000000
+   4  17  18086.0000000
+   4  36  31885.0000000
+   5   6  91011.1200000
+   5  35   6862.6860000
+   6   7  32454.6600000
+   6  35  12789.8300000
+   7   8   7850.8370000
+   7   9   3571.5850000
+   7  11    301.3558000
+   7  12    162.1086000
+   7  13    315.9040000
+   7  35  40009.6500000
+   8   9   7165.5120000
+   8  10   1207.4480000
+   8  20      5.1048280
+   8  21     26.7743000
+   8  22   1598.1240000
+   8  23    258.5752000
+   8  24      5.4173680
+   8  35  22905.0500000
+   9  10    572.5732000
+   9  35   6386.4730000
+   9  36    608.8777000
+  10  35    465.0319000
+  10  36    195.5839000
+  11  19    556.1747000
+  11  36   3570.6830000
+  12  19    225.1819000
+  12  26      9.4262170
+  12  36   1407.6480000
+  13  36   1594.0610000
+  14  25      6.0043720
+  14  26     49.2024900
+  14  27    261.8573000
+  14  28     63.3794800
+  14  29    127.4261000
+  14  36 114449.2000000
+  15  19    293.5468000
+  15  25      1.7512740
+  15  26     11.6751600
+  15  27     80.8921600
+  15  28     49.2024500
+  15  29     18.8470400
+  15  36  19165.0200000
+  16  19   3784.4500000
+  16  27     45.8670600
+  16  36  19782.0500000
+  17  36  26864.7600000
+  18  19    806.4227000
+  18  25      0.2501829
+  18  26     11.6752000
+  18  27      1.6678860
+  18  29     35.9429400
+  18  32      0.7505485
+  18  36   3323.8460000
+  19  19    249.7562000
+  19  33      2.0457840
+  19  36   1458.4740000
+  20  36      3.5421030
+  21  33      0.2083602
+  21  36     13.7517700
+  22  27     15.1097800
+  22  28     15.2139900
+  22  30      2.8135460
+  22  31     95.2437400
+  22  32     12.8172700
+  22  33     17.9233300
+  22  36   1204.6150000
+  23  30      2.6997520
+  23  32      8.3069310
+  23  33     11.0066800
+  23  36    137.9989000
+  24  36      2.8128020
+  25  36      4.0864270
+  26  36     42.9546900
+  27  30      8.5701670
+  27  36    211.6495000
+  28  36     67.3184600
+  29  36     94.9054400
+  30  36      6.8147860
+  31  32      4.4808280
+  31  36     50.8521800
+  32  36     13.6429500
+  33  36     16.4127900
+  34   5 182022.2000000
+  35   2  32570.3000000
+  35   7  21930.1200000
+  35   8  44101.0200000
+  35   9   3405.3340000
+  35  11   2664.9460000
+  35  12   1457.1710000
+  35  13   2858.2020000
+  35  22    316.1070000
+  35  23    108.7901000
+  35  36 288606.4000000
+  36   3 623594.4000000
+  36  19   1417.6960000
+
+*vector bio-masses / chesapeake
+*vertices 39
+  3480.0000000
+    79.0000000
+   600.0000000
+   177.2500000
+   390.5000000
+    39.0000000
+   148.7500000
+   197.5000000
+    19.2500000
+     1.7500070
+   363.7500000
+   110.0000000
+  1100.0000000
+  1186.5000000
+   113.2500000
+  1890.2500000
+   337.5000000
+   228.0000000
+   275.0000000
+     0.1000075
+     1.1500000
+    72.7500000
+    31.5250000
+     0.4500050
+     0.9500025
+     9.0000000
+    35.0000000
+    25.4750000
+    22.3750000
+     2.2500020
+     6.3000020
+     4.4250020
+     4.4000020
+ 21857.5000000
+  7631.0000000
+305000.0000000
+     0.0000000
+     0.0000000
+     0.0000000
+
diff --git a/data/pajek/CrystalC.paj b/data/pajek/CrystalC.paj
new file mode 100644
index 000000000..44cec3148
--- /dev/null
+++ b/data/pajek/CrystalC.paj
@@ -0,0 +1,215 @@
+% Web 1 Crystal River Creek (Control); Homer & Kemp Unpubl. Ms.; Mg/M2/Day
+% from datall.zip from http://www.cbl.cees.edu/~ulan/ntwk/network.html
+% Tidal Marsh Gut, Vicinity of Crystal River Nuclear Power
+% Plant, Crystal River, Florida, USA
+% Homer, M. and W.M. Kemp. Unpublished Ms. See also Ulanowicz, R.E.
+% 1986. Growth and Development: Ecosystems Phenomenology. Springer, New
+% York. pp 69-79.
+% transformed from SCOR format by Scor2net 15.7.2003
+*partition ECO types / CrystalC
+*vertices 24
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+2
+3
+4
+5
+
+*network CrystalC
+*vertices 24
+   1 "microphytes"
+   2 "macrophytes"
+   3 "zooplankton"
+   4 "benthic invertebrates"
+   5 "blacktip shark"
+   6 "stingray"
+   7 "striped anchovy"
+   8 "bay anchovy"
+   9 "needlefish"
+  10 "sheepshead killifish"
+  11 "goldspotted killifish"
+  12 "gulf killifish"
+  13 "longnosed killifish"
+  14 "silverside"
+  15 "moharra"
+  16 "silver jenny"
+  17 "sheepshead"
+  18 "pinfish"
+  19 "mullet"
+  20 "gulf flounder"
+  21 "detritus"
+  22 "Input"
+  23 "Output"
+  24 "Respiration"
+*arcs
+  22   2   6704.00
+  22   8      1.57
+  22   9      0.02
+  22  12      0.16
+  22  18      0.07
+   3  23     39.94
+   4  23    427.91
+   5  23      1.21
+   6  23      0.09
+   7  23      0.01
+   8  23      0.74
+   9  23      0.32
+  10  23      0.14
+  11  23      0.09
+  12  23      1.50
+  13  23      1.27
+  14  23      0.43
+  15  23      1.49
+  16  23      0.04
+  17  23      0.09
+  18  23      0.38
+  19  23      2.41
+  20  23      0.04
+  21  23    567.79
+   2  24   2322.00
+   3  24     31.30
+   4  24    981.60
+   5  24      0.80
+   6  24      0.46
+   7  24      0.11
+   8  24      0.73
+   9  24      0.89
+  10  24      0.54
+  11  24      0.89
+  12  24      3.70
+  13  24      2.87
+  14  24      7.23
+  15  24      2.94
+  16  24      0.06
+  17  24      0.12
+  18  24      1.16
+  19  24     11.15
+  20  24      0.05
+  21  24   2530.10
+   1  10      0.44
+   1  11      0.32
+   1  17      0.16
+   1  19      8.15
+   1  21    404.00
+   2  21   4163.00
+   3   7      0.09
+   3   8      0.64
+   3  11      0.22
+   3  14      5.86
+   3  15      3.20
+   3  16      0.05
+   3  21     73.20
+   4   7      0.01
+   4   8      1.00
+   4   9      0.12
+   4  10      0.15
+   4  11      0.61
+   4  12      2.68
+   4  13      5.28
+   4  14      8.59
+   4  15      2.30
+   4  16      0.06
+   4  17      0.16
+   4  18      0.53
+   4  21    686.90
+   5  21      0.50
+   6  21      0.15
+   7  21      0.03
+   8   9      0.63
+   8  12      0.50
+   8  18      0.74
+   8  20      0.02
+   8  21      0.22
+   9  18      0.02
+   9  21      0.32
+  10   6      0.03
+  10  12      0.01
+  10  18      0.01
+  10  21      0.65
+  11   6      0.01
+  11  12      0.09
+  11  18      0.10
+  11  21      0.68
+  12   6      0.07
+  12  21      1.32
+  13   9      0.05
+  13  12      0.03
+  13  21      1.06
+  14   6      0.51
+  14   9      0.62
+  14  12      2.67
+  14  18      0.56
+  14  20      0.02
+  14  21      3.38
+  15   9      0.02
+  15  12      0.37
+  15  18      0.01
+  15  20      0.04
+  15  21      1.53
+  16  21      0.03
+  17  21      0.11
+  18   9      0.06
+  18  20      0.03
+  18  21      0.41
+  19   5      2.51
+  19   6      0.08
+  19   9      0.03
+  19  12      0.08
+  19  21     16.29
+  20  21      0.02
+  21   3    109.80
+  21   4   2117.90
+  21   7      0.05
+  21   8      0.37
+  21  10      0.79
+  21  11      0.71
+  21  14      0.97
+  21  15      0.90
+  21  16      0.02
+  21  19     24.40
+
+*vector bio-masses / CrystalC
+*vertices 24
+   332.0
+446000.0
+   261.0
+ 14148.0
+   107.0
+    40.0
+     4.0
+    15.0
+    46.0
+    16.0
+    27.0
+   156.0
+   121.0
+   246.0
+    82.0
+     2.0
+    13.0
+    54.0
+   864.0
+     2.0
+695000.0
+     0.0
+     0.0
+     0.0
+
diff --git a/data/pajek/CrystalD.paj b/data/pajek/CrystalD.paj
new file mode 100644
index 000000000..8432c5df2
--- /dev/null
+++ b/data/pajek/CrystalD.paj
@@ -0,0 +1,190 @@
+% Web 2 Crystal River Creek (Delta Temp), Homer & Kemp Unpbl. Ms., Mg/M2/Day
+% from datall.zip from http://www.cbl.cees.edu/~ulan/ntwk/network.html
+% Tidal Marsh Gut with thermal effluent (6 deg. C delta T)
+% Adjacent to Crystal River Nuclear Power Plant, Crystal River, Florida, USA
+% Homer, M. and W.M. Kemp. Unpublished Ms. See also Ulanowicz, R.E.
+% 1986. Growth and Development: Ecosystems Phenomenology. Springer,
+% New York. pp 69-79.
+% transformed from SCOR format by Scor2net 15.7.2003
+*partition ECO types / CrystalD
+*vertices 24
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+2
+3
+4
+5
+
+*network CrystalD
+*vertices 24
+   1 "microphytes"
+   2 "macrophytes"
+   3 "zooplankton"
+   4 "benthic invertebrates"
+   5 "stingray"
+   6 "bay anchovy"
+   7 "catfish"
+   8 "needlefish"
+   9 "sheepshead killifish"
+  10 "goldspotted killifish"
+  11 "gulf killifish"
+  12 "longnosed killifish"
+  13 "molly"
+  14 "silverside"
+  15 "moharra"
+  16 "pinfish"
+  17 "spot"
+  18 "black drum"
+  19 "red drum"
+  20 "mullet"
+  21 "detritus"
+  22 "Input"
+  23 "Output"
+  24 "Respiration"
+*arcs
+  22   2   5488.00
+  22  16      0.02
+   2  23    166.00
+   3  23     32.40
+   4  23     33.55
+   6  23      0.75
+   7  23      0.02
+   8  23      0.01
+  10  23      0.10
+  11  23      0.73
+  12  23      0.69
+  13  23      0.05
+  14  23      0.05
+  15  23      0.25
+  16  23      0.09
+  17  23      0.02
+  18  23      0.41
+  19  23      0.07
+  20  23      1.32
+  21  23    616.51
+   2  24   2166.00
+   3  24     31.30
+   4  24    681.00
+   5  24      0.04
+   6  24     17.12
+   7  24      0.12
+   8  24      0.23
+   9  24      0.19
+  10  24      0.26
+  11  24      1.39
+  12  24      1.92
+  13  24      0.12
+  14  24      0.32
+  15  24      0.38
+  16  24      0.18
+  17  24      0.04
+  18  24      1.01
+  19  24      0.22
+  20  24     10.01
+  21  24   2087.50
+   1   9      0.12
+   1  10      0.10
+   1  13      0.35
+   1  20      5.73
+   1  21    319.00
+   2  21   3156.00
+   3   6     13.60
+   3  10      0.07
+   3  14      0.33
+   3  15      0.40
+   3  21     78.10
+   4   6      2.10
+   4   7      0.17
+   4   9      0.04
+   4  10      0.19
+   4  11      1.71
+   4  12      3.48
+   4  14      0.49
+   4  15      0.28
+   4  16      0.09
+   4  17      0.07
+   4  18      1.78
+   4  19      0.36
+   4  20     17.19
+   4  21    742.60
+   5  21      0.01
+   6   5      0.04
+   6   8      0.24
+   6  11      0.37
+   6  16      0.23
+   6  21      4.69
+   7  21      0.03
+   8  21      0.06
+   9  11      0.01
+   9  21      0.18
+  10  11      0.01
+  10  21      0.21
+  11  11      0.01
+  11  21      0.54
+  12  11      0.17
+  12  21      0.70
+  13  21      0.18
+  14  11      0.33
+  14  21      0.18
+  15  21      0.16
+  16  21      0.07
+  17  21      0.01
+  18  21      0.36
+  19  21      0.07
+  20   5      0.01
+  20   8      0.06
+  20  11      0.06
+  20  21     11.46
+  21   3    117.15
+  21   4   1485.10
+  21   6      7.74
+  21   9      0.22
+  21  10      0.22
+  21  14      0.06
+  21  15      0.11
+
+*vector bio-masses / CrystalD
+*vertices 24
+   335.0
+280000.0
+   261.0
+ 11258.0
+     4.0
+   378.0
+     9.6
+    12.0
+     6.8
+     8.6
+    60.0
+    83.0
+     4.7
+    14.0
+    14.0
+    11.0
+     1.0
+    68.0
+    15.6
+   868.0
+462000.0
+     0.0
+     0.0
+     0.0
+
diff --git a/data/pajek/Everglades.paj b/data/pajek/Everglades.paj
new file mode 100644
index 000000000..88e8ece05
--- /dev/null
+++ b/data/pajek/Everglades.paj
@@ -0,0 +1,1141 @@
+% Web 40 Everglades Graminoid Marshes; Wet Season - Opossum corrected - gC/m2/y - 07/25/00 3
+% from datall.zip from http://www.cbl.cees.edu/~ulan/ntwk/network.html
+% Ulanowicz, R.E., J.J. Heymans, and M.S. Egnotovich. 2000. Network
+% Analysis of Trophic Dynamics in South Florida Ecosystems, FY 99: The
+% Graminoid Ecosystem. Ref. No. [UMCES] CBL 00-0176. Chesapeake
+% Biological Laboratory, Solomons, MD 20688-0038 USA.
+% <http://cbl.umces.edu/~atlss/swgras701.html>
+% transformed from SCOR format by Scor2net 14.7.2003
+*partition ECO types / everglades
+*vertices 69
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+2
+2
+2
+3
+4
+5
+
+*network everglades
+*vertices 69
+   1 "Living Sediments"
+   2 "Living POC"
+   3 "Periphyton"
+   4 "Macrophytes"
+   5 "Utricularia"
+   6 "Floating Veg."
+   7 "Apple snail"
+   8 "Freshwater Prawn"
+   9 "Crayfish"
+  10 "Mesoinverts"
+  11 "Other Macroinverts"
+  12 "Large Aquatic Insects"
+  13 "Terrestrial Inverts"
+  14 "Fishing spider"
+  15 "Gar"
+  16 "Shiners & Minnows"
+  17 "Chubsuckers"
+  18 "Catfish"
+  19 "Flagfish"
+  20 "Topminnows"
+  21 "Bluefin killifish"
+  22 "Killifishes"
+  23 "Mosquitofishes"
+  24 "Poecilids"
+  25 "Pigmy Sunfish"
+  26 "Bluespotted Sunfish"
+  27 "Warmouth"
+  28 "Dollar Sunfish"
+  29 "Redear Sunfish"
+  30 "Spotted sunfish"
+  31 "Other Centrarchids"
+  32 "Largemouth Bass"
+  33 "Cichlids"
+  34 "Other Large Fishes"
+  35 "Other Small Fishes"
+  36 "Salamanders"
+  37 "Salamander larvae"
+  38 "Large frogs"
+  39 "Medium frogs"
+  40 "Small frogs"
+  41 "Tadpoles"
+  42 "Turtles"
+  43 "Snakes"
+  44 "Lizards"
+  45 "Alligators"
+  46 "Muskrats"
+  47 "Rats&Mice"
+  48 "Rabbits"
+  49 "Raccoons"
+  50 "Opossum"
+  51 "Otter"
+  52 "Mink"
+  53 "W-T Deer"
+  54 "Bobcat"
+  55 "Panthers"
+  56 "Grebes"
+  57 "Bitterns"
+  58 "Ducks"
+  59 "Snailkites"
+  60 "Nighthawks"
+  61 "Gruiformes"
+  62 "CSSsparrow"
+  63 "Passerines"
+  64 "Sediment Carbon"
+  65 "Labile Detritus"
+  66 "Refractory Detritus"
+  67 "Input"
+  68 "Output"
+  69 "Respiration"
+*arcs
+  67   3  2.832627E+03
+  67   4  1.313124E+03
+  67   5  5.999271E+02
+  67   6  1.522945E+03
+  67  44  3.506437E+00
+   2  68  6.954134E+00
+   7  68  1.060947E-01
+   8  68  1.493327E-01
+  10  68  7.353957E-03
+  11  68  6.262771E-03
+  12  68  1.667374E-03
+  15  68  2.208839E-03
+  16  68  5.705550E-03
+  17  68  4.081583E-02
+  18  68  2.295798E-02
+  19  68  3.137470E-01
+  20  68  4.443052E-02
+  21  68  6.572313E-01
+  22  68  8.479014E-02
+  23  68  9.113920E-02
+  24  68  1.170176E-01
+  25  68  4.003657E-03
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+  27  68  6.132517E-02
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+  50  66  9.651498E-02
+  51  64  2.085217E-03
+  51  66  4.176694E-03
+  52  54  1.812674E-09
+  52  64  6.752179E-07
+  52  66  1.352461E-06
+  53  45  2.900211E-06
+  53  54  8.279841E-06
+  53  55  1.537730E-06
+  53  64  1.050529E-02
+  53  66  2.104212E-02
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+  56  45  1.385892E-08
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+  56  66  1.663432E-05
+  57  45  4.516399E-12
+  57  49  4.032069E-12
+  57  50  7.384658E-14
+  57  52  1.250960E-12
+  57  63  7.168358E-14
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+  57  66  5.420849E-09
+  58  45  1.169343E-07
+  58  49  1.043940E-07
+  58  50  1.911965E-09
+  58  52  3.238852E-08
+  58  63  1.855963E-09
+  58  64  5.605620E-05
+  58  66  1.122812E-04
+  59  49  5.641780E-10
+  59  50  1.033286E-11
+  59  52  1.750367E-10
+  59  63  1.003016E-11
+  59  64  3.786811E-07
+  59  66  7.584993E-07
+  60  49  6.078228E-08
+  60  50  1.113218E-09
+  60  52  1.885780E-08
+  60  63  1.080611E-09
+  60  64  4.079760E-05
+  60  66  8.171768E-05
+  61  49  6.447645E-08
+  61  50  1.180872E-09
+  61  52  2.000386E-08
+  61  63  1.146282E-09
+  61  64  4.327709E-05
+  61  66  8.668419E-05
+  62  47  9.511896E-08
+  62  49  6.019731E-09
+  62  50  1.102503E-10
+  62  52  1.867629E-09
+  62  63  1.070215E-10
+  62  64  4.040497E-06
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+  63  47  1.227864E-06
+  63  49  7.770686E-08
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+  63  52  2.410867E-08
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+  63  63  1.381498E-09
+  63  64  5.215745E-05
+  63  66  1.044719E-04
+  64   1  3.874999E+02
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+  64  11  1.218530E-01
+  64  13  1.761220E-02
+  64  19  5.222166E-02
+  64  21  6.179828E-02
+  64  22  6.647838E-03
+  64  23  4.103967E-03
+  64  24  2.704814E-02
+  64  35  4.836089E-05
+  65   2  1.861676E+01
+  65   7  1.030550E-02
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+  65   9  2.803458E-02
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+  65  11  2.115177E-01
+  65  12  1.225960E-02
+  65  13  1.158298E-01
+  65  16  3.217709E-03
+  65  17  5.065018E-02
+  65  18  3.487920E-03
+  65  19  5.206728E-01
+  65  21  5.088312E-01
+  65  22  9.553630E-02
+  65  23  3.535136E-02
+  65  24  1.929484E-01
+  65  31  7.228513E-04
+  65  35  3.487821E-04
+  65  41  2.900141E-05
+  65  64  1.300471E+03
+  66   2  8.760818E+00
+  66   9  5.596149E-03
+  66  10  6.880692E-02
+  66  11  2.172915E-02
+  66  13  7.806649E-03
+  66  16  1.284579E-04
+  66  17  2.023433E-02
+  66  18  1.392809E-04
+  66  19  2.080774E-01
+  66  21  2.032673E-02
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+  66  23  1.412330E-03
+  66  24  7.704998E-03
+  66  31  2.887869E-05
+  66  35  1.392829E-05
+  66  41  1.160059E-04
+  66  50  2.054219E-01
+  66  64  2.113068E+03
+
+*vector bio-masses / everglades
+*vertices 69
+ 3.127182E+00
+ 1.496700E-02
+ 1.162688E+02
+ 1.275253E+02
+ 4.031987E+01
+ 8.949000E+01
+ 6.790128E-02
+ 1.364344E-01
+ 4.589158E-02
+ 1.716268E-01
+ 1.913203E-01
+ 1.225810E-02
+ 6.338722E-02
+ 2.504513E-03
+ 3.119171E-03
+ 2.622904E-03
+ 3.330771E-02
+ 1.905039E-02
+ 1.004261E-01
+ 1.354120E-02
+ 3.185840E-01
+ 2.608070E-02
+ 2.098890E-02
+ 2.964829E-02
+ 1.310696E-03
+ 5.106990E-04
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+ 6.034759E-02
+ 1.086434E-01
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+ 2.243605E-03
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+ 2.075489E-02
+ 1.776591E-03
+ 1.311021E-04
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+ 1.477798E-03
+ 3.004200E-07
+ 4.144401E-03
+ 1.219992E-05
+ 3.703360E-06
+ 1.099882E-06
+ 3.711049E-10
+ 9.600274E-06
+ 1.003570E-07
+ 5.599436E-06
+ 5.899958E-06
+ 5.997621E-07
+ 7.200200E-06
+ 3.932999E+03
+ 1.194364E+00
+ 4.777452E+00
+ 0.000000E+00
+ 0.000000E+00
+ 0.000000E+00
+
diff --git a/data/pajek/Florida.paj b/data/pajek/Florida.paj
new file mode 100644
index 000000000..aa43baff8
--- /dev/null
+++ b/data/pajek/Florida.paj
@@ -0,0 +1,2509 @@
+% Web 38 Florida Bay Trophic Exchange Matrix, Wet Season   0
+% from datall.zip from http://www.cbl.cees.edu/~ulan/ntwk/network.html
+% Florida Bay Wet Season 125 - component trophic exchange matrix.
+% Ulanowicz, R.E., C. Bondavalli and M.S. Egnotovich. 1998. Network
+% Analysis of Trophic Dynamics in South Florida Ecosystem, FY 97:
+% The Florida Bay Ecosystem. Ref. No. [UMCES]CBL 98-123. Chesapeake
+% Biological Laboratory, Solomons, MD 20688-0038 USA.
+% <http://cbl.umces.edu/~atlss/FBay701.html>
+% transformed from SCOR format by Scor2net 15.7.2003
+*partition ECO types / florida
+*vertices 128
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
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+1
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+1
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+1
+1
+1
+1
+1
+1
+1
+1
+2
+2
+2
+3
+4
+5
+
+*network florida
+*vertices 128
+   1 "2um Spherical Phytoplankt"
+   2 "Synedococcus"
+   3 "Oscillatoria"
+   4 "Small Diatoms (<20um)"
+   5 "Big Diatoms (>20um)"
+   6 "Dinoflagellates"
+   7 "Other Phytoplankton"
+   8 "Benthic Phytoplankton"
+   9 "Thalassia"
+  10 "Halodule"
+  11 "Syringodium"
+  12 "Roots"
+  13 "Drift Algae"
+  14 "Epiphytes"
+  15 "Free Bacteria"
+  16 "Water Flagellates"
+  17 "Water Cilitaes"
+  18 "Acartia Tonsa"
+  19 "Oithona nana"
+  20 "Paracalanus"
+  21 "Other Copepoda"
+  22 "Meroplankton"
+  23 "Other Zooplankton"
+  24 "Benthic Flagellates"
+  25 "Benthic Ciliates"
+  26 "Meiofauna"
+  27 "Sponges"
+  28 "Coral"
+  29 "Other Cnidaridae"
+  30 "Echinoderma"
+  31 "Bivalves"
+  32 "Detritivorous Gastropods"
+  33 "Epiphytic Gastropods"
+  34 "Predatory Gastropods"
+  35 "Detritivorous Polychaetes"
+  36 "Predatory Polychaetes"
+  37 "Suspension Feeding Polych"
+  38 "Macrobenthos"
+  39 "Benthic Crustaceans"
+  40 "Detritivorous Amphipods"
+  41 "Herbivorous Amphipods"
+  42 "Isopods"
+  43 "Herbivorous Shrimp"
+  44 "Predatory Shrimp"
+  45 "Pink Shrimp"
+  46 "Thor Floridanus"
+  47 "Lobster"
+  48 "Detritivorous Crabs"
+  49 "Omnivorous Crabs"
+  50 "Predatory Crabs"
+  51 "Callinectus sapidus"
+  52 "Stone Crab"
+  53 "Sharks"
+  54 "Rays"
+  55 "Tarpon"
+  56 "Bonefish"
+  57 "Sardines"
+  58 "Anchovy"
+  59 "Bay Anchovy"
+  60 "Lizardfish"
+  61 "Catfish"
+  62 "Eels"
+  63 "Toadfish"
+  64 "Brotalus"
+  65 "Halfbeaks"
+  66 "Needlefish"
+  67 "Other Killifish"
+  68 "Goldspotted killifish"
+  69 "Rainwater killifish"
+  70 "Snook"
+  71 "Sailfin Molly"
+  72 "Silverside"
+  73 "Other Horsefish"
+  74 "Gulf Pipefish"
+  75 "Dwarf Seahorse"
+  76 "Grouper"
+  77 "Jacks"
+  78 "Pompano"
+  79 "Other Snapper"
+  80 "Gray Snapper"
+  81 "Mojarra"
+  82 "Grunt"
+  83 "Porgy"
+  84 "Pinfish"
+  85 "Scianids"
+  86 "Spotted Seatrout"
+  87 "Red Drum"
+  88 "Spadefish"
+  89 "Parrotfish"
+  90 "Mackerel"
+  91 "Mullet"
+  92 "Barracuda"
+  93 "Blennies"
+  94 "Code Goby"
+  95 "Clown Goby"
+  96 "Flatfish"
+  97 "Filefishes"
+  98 "Puffer"
+  99 "Other Pelagic Fishes"
+ 100 "Other Demersal Fishes"
+ 101 "Loon"
+ 102 "Greeb"
+ 103 "Pelican"
+ 104 "Comorant"
+ 105 "Big Herons & Egrets"
+ 106 "Small Herons & Egrets"
+ 107 "Ibis"
+ 108 "Roseate Spoonbill"
+ 109 "Herbivorous Ducks"
+ 110 "Omnivorous Ducks"
+ 111 "Predatory Ducks"
+ 112 "Raptors"
+ 113 "Gruiformes"
+ 114 "Small Shorebirds"
+ 115 "Gulls & Terns"
+ 116 "Kingfisher"
+ 117 "Crocodiles"
+ 118 "Loggerhead Turtle"
+ 119 "Green Turtle"
+ 120 "Hawksbill Turtle"
+ 121 "Dolphin"
+ 122 "Manatee"
+ 123 "Water POC"
+ 124 "Benthic POC"
+ 125 "DOC"
+ 126 "Input"
+ 127 "Output"
+ 128 "Respiration"
+*arcs
+ 126   1  5.217257E+00
+ 126   2  7.388673E+01
+ 126   3  8.589100E-02
+ 126   4  4.454220E-01
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+
+*vector bio-masses / florida
+*vertices 128
+ 6.775698E-02
+ 9.595680E-01
+ 1.227893E-03
+ 5.784987E-03
+ 8.771067E-03
+ 1.019400E-02
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+ 6.191941E+02
+ 1.970461E+01
+ 0.000000E+00
+ 0.000000E+00
+ 0.000000E+00
+
diff --git a/data/pajek/Maspalomas.paj b/data/pajek/Maspalomas.paj
new file mode 100644
index 000000000..d821137a3
--- /dev/null
+++ b/data/pajek/Maspalomas.paj
@@ -0,0 +1,171 @@
+% Web 39 Charca de Maspalomas
+% from datall.zip from http://www.cbl.cees.edu/~ulan/ntwk/network.html
+% Charca de Maspalomas, Gran Canaria
+% Almunia, J., G. Basterretxea, J. Aristegui, and R.E. Ulanowicz. 1999.
+% Benthic- Pelagic switching in a coastal subtropical lagoon. Estuarine,
+% Coastal and Shelf Science 49:363-384.
+% transformed from SCOR format by Scor2net 15.7.2003
+*partition ECO types / Maspalomas
+*vertices 24
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+2
+2
+2
+3
+4
+5
+
+*network Maspalomas
+*vertices 24
+   1 "Cyanobacteria"
+   2 "Eukaryotic Phyto"
+   3 "Chara globularis"
+   4 "Ruppia Maritima"
+   5 "Cladophora"
+   6 "Periphyton"
+   7 "Pelagic Bacteria"
+   8 "Microzooplankton"
+   9 "Mesozooplankton"
+  10 "Macrozooplankton"
+  11 "Benthic Microfauna"
+  12 "Benthic Suspension Feeder"
+  13 "Benthic Deposit Feeders"
+  14 "Benthic Invertebrate Car."
+  15 "Liza Aurata"
+  16 "Gallinula chloropus"
+  17 "Diplodus Sargus"
+  18 "Dicentratus punctatus"
+  19 "DOC"
+  20 "Suspended POC"
+  21 "Sedimented POC"
+  22 "Input"
+  23 "Output"
+  24 "Respiration"
+*arcs
+  22   1 552615.0
+  22   2 552615.0
+  22   3  46400.0
+  22   4 290000.0
+  22   5  11600.0
+  22   6  33000.0
+  16  23  25000.0
+  19  23   1261.0
+  21  23 471733.0
+   1  24 110522.0
+   2  24 110522.0
+   3  24   4640.0
+   4  24  29000.0
+   5  24   1160.0
+   6  24   3300.0
+   7  24  28238.0
+   8  24 100700.0
+   9  24 205822.0
+  10  24  89270.0
+  11  24  49336.0
+  12  24  46127.0
+  13  24  93245.0
+  14  24  30529.0
+  15  24  12778.0
+  16  24  21643.0
+  17  24  39007.0
+  18  24  12397.0
+   1   8 348936.0
+   1  12  60000.0
+   1  20  33157.0
+   2   9 286044.0
+   2  12  50000.0
+   2  19  72892.0
+   2  21  33157.0
+   3  15  18560.0
+   3  21  23200.0
+   4  16  58000.0
+   4  21 203000.0
+   5  15   4640.0
+   5  21   5800.0
+   6  15   2357.0
+   6  16  14143.0
+   6  21  13200.0
+   7   8  13883.0
+   7  20  16561.0
+   8   9 293385.0
+   8  12   3757.0
+   8  20   5023.0
+   9  10 207784.0
+   9  20 205823.0
+   9  21  30000.0
+  10  17  35438.0
+  10  18  23805.0
+  10  21  89271.0
+  11  13  64137.0
+  11  21 215435.0
+  12  21  47665.0
+  12  17  59965.0
+  13  14 101762.0
+  13  15   8519.0
+  13  17   2420.0
+  13  18   8519.0
+  13  21 343034.0
+  14  17  39687.0
+  14  21  31546.0
+  15  17  16613.0
+  15  21  21723.0
+  16  21  25500.0
+  17  21 131233.0
+  18  17  16117.0
+  18  21  21810.0
+  19   7  58682.0
+  19   8  40046.0
+  20   9  70000.0
+  20  10  30000.0
+  20  12  40000.0
+  20  19  27097.0
+  20  21  93467.0
+  21  11 328908.0
+  21  13 493362.0
+  21  15  17038.0
+  21  18  18000.0
+
+*vector bio-masses / Maspalomas
+*vertices 24
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     0.0
+     0.0
+     0.0
+
diff --git a/data/pajek/Michigan.paj b/data/pajek/Michigan.paj
new file mode 100644
index 000000000..2513d5d69
--- /dev/null
+++ b/data/pajek/Michigan.paj
@@ -0,0 +1,354 @@
+% Web 47 Lake Michigan Control network, A. Krause & D. Mason, Mich State Univ.         02
+% from datall.zip from http://www.cbl.cees.edu/~ulan/ntwk/network.html
+% Lake Michigan Control network
+% Krause, A. and D. Mason. (In preparation.) A. Krause, PhD.
+% Dissertation, Michigan State University. Ann Arbor, MI. USA
+% transformed from SCOR format by Scor2net 15.7.2003
+*partition ECO types / Michigan
+*vertices 39
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+2
+3
+4
+5
+
+*network Michigan
+*vertices 39
+   1 "Flagellates"
+   2 "Blue-greenGree"
+   3 "Diatoms"
+   4 "Rotifers"
+   5 "Cyclopoids"
+   6 "Calanoids"
+   7 "Cladocerans"
+   8 "Leptodora"
+   9 "Bythotrephes"
+  10 "Diporeia"
+  11 "Mysis"
+  12 "Oligoch/Chiron"
+  13 "Sphae/Gast"
+  14 "Zebra mussels"
+  15 "Benthic microin"
+  16 "Other fish"
+  17 "Alewife"
+  18 "Bloater"
+  19 "Rainbow smelt"
+  20 "Slimy sculpin"
+  21 "Deepwater sculp"
+  22 "Lake Whitefish"
+  23 "Yellow perch"
+  24 "Juv. Brown trou"
+  25 "Juv. Steelhead"
+  26 "Juv. Coho"
+  27 "Juv. Chinook"
+  28 "Juv. Lake Trout"
+  29 "Burbot"
+  30 "Brown trout"
+  31 "Steelhead"
+  32 "Coho"
+  33 "Chinook"
+  34 "Lake trout"
+  35 "Sea lamprey"
+  36 "Detritus"
+  37 "Input"
+  38 "Output"
+  39 "Respiration"
+*arcs
+  37   1  2.723458E+3
+  37   2  2.115243E+2
+  37   3  8.306155E+3
+  37   9  1.000000E-8
+  37  14  1.000000E-8
+   9  38  1.000000E-8
+  14  38  1.000000E-8
+  18  38  1.400329E-2
+  19  38  1.924686E-1
+  20  38  2.344286E-2
+  21  38  3.793669E-2
+  22  38  4.799024E-2
+  23  38  1.281846E-2
+  29  38  2.078146E-3
+  30  38  4.997260E-3
+  31  38  4.986396E-3
+  32  38  7.983812E-3
+  33  38  1.994299E-2
+  34  38  5.004168E-3
+  36  38  7.584167E+3
+   4  39  9.031825E+1
+   5  39  4.733505E+2
+   6  39  1.350784E+3
+   7  39  3.170392E+2
+   8  39  2.727899E+0
+  10  39  4.223998E+2
+  11  39  6.702310E+1
+  12  39  6.920930E+2
+  13  39  3.113215E+1
+  15  39  9.474703E+1
+  16  39  1.867121E+1
+  17  39  3.027174E+1
+  18  39  4.407337E+1
+  19  39  2.160244E+0
+  20  39  7.228214E-1
+  21  39  1.494107E+1
+  22  39  2.008591E+0
+  23  39  4.239952E-2
+  24  39  4.157180E-3
+  25  39  3.149428E-2
+  26  39  5.950275E-4
+  27  39  1.579224E-1
+  28  39  1.722205E-1
+  29  39  1.246887E-2
+  30  39  9.394848E-2
+  31  39  1.456027E-1
+  32  39  3.263383E-1
+  33  39  9.881751E-1
+  34  39  1.611342E-1
+   1   4  3.681287E+1
+   1   5  2.201531E+2
+   1   6  7.346722E+2
+   1   7  1.107366E+2
+   1  10  1.256324E+2
+   1  11  4.923249E+0
+   1  13  7.301370E+0
+   1  16  5.490278E-1
+   1  36  1.482677E+3
+   2   4  1.826167E+0
+   2   5  7.532688E+0
+   2   6  1.822466E+1
+   2   7  3.662734E+1
+   2  10  6.233169E+1
+   2  11  4.885446E+0
+   2  13  7.245661E+0
+   2  16  5.450497E-1
+   2  36  7.230560E+1
+   3   4  5.314396E+1
+   3   5  4.497071E+2
+   3   6  1.078875E+3
+   3   7  5.512479E+2
+   3  10  3.752408E+2
+   3  11  4.902088E+0
+   3  13  7.270131E+0
+   3  16  5.400097E-1
+   3  36  5.785228E+3
+   4   5  3.809107E+0
+   4  36  8.922894E+1
+   5   8  1.252102E+0
+   5  11  2.437598E+1
+   5  16  2.720221E+0
+   5  17  2.036166E+0
+   5  18  1.198097E+0
+   5  19  1.850150E-1
+   5  23  7.000569E-3
+   5  36  2.516134E+2
+   6   8  1.187038E+0
+   6  11  1.904461E+1
+   6  16  2.657084E+0
+   6  17  1.192638E+1
+   6  18  1.755056E+0
+   6  19  3.610115E-1
+   6  23  7.000223E-3
+   6  36  4.440501E+2
+   7   8  1.218066E+0
+   7  11  2.444533E+1
+   7  16  7.353400E+0
+   7  17  1.220866E+1
+   7  18  1.495481E+1
+   7  19  1.112060E+0
+   7  22  1.370074E-1
+   7  23  7.000381E-3
+   7  36  3.568644E+2
+   8  17  3.601187E-2
+   8  18  5.301748E-2
+   8  23  3.000989E-3
+   8  36  8.372760E-1
+  10  16  5.464464E+0
+  10  17  1.391018E+1
+  10  18  3.611906E+1
+  10  19  5.570472E-1
+  10  20  9.000763E-1
+  10  21  1.305711E+1
+  10  22  2.058175E+0
+  10  23  1.400119E-2
+  10  29  1.000085E-3
+  10  36  1.311831E+2
+  11  17  4.350526E-1
+  11  18  6.389772E+0
+  11  19  3.940476E-1
+  11  20  1.060128E-1
+  11  21  2.132258E+0
+  11  29  1.000121E-3
+  11  36  2.077651E+1
+  12  12  4.838264E+1
+  12  16  2.765522E+0
+  12  21  5.084799E+0
+  12  22  2.781532E-1
+  12  23  1.800991E-2
+  12  36  2.073792E+2
+  13  16  3.342090E+0
+  13  22  3.050995E-1
+  13  36  1.367746E+1
+  15  10  1.245684E+1
+  15  11  4.882682E+0
+  15  36  4.865372E+1
+  16  16  2.431720E-1
+  16  19  1.031730E+0
+  16  23  1.300920E-2
+  16  24  3.002124E-3
+  16  25  1.000708E-2
+  16  26  3.002124E-4
+  16  27  4.202974E-2
+  16  28  6.104319E-2
+  16  29  4.002832E-3
+  16  30  2.902053E-2
+  16  31  4.703327E-2
+  16  32  1.441019E-1
+  16  33  6.604673E-2
+  16  34  2.001416E-2
+  16  36  7.160066E+0
+  17  24  3.015314E-3
+  17  25  4.321950E-2
+  17  26  5.025523E-4
+  17  27  1.779035E-1
+  17  28  9.749515E-2
+  17  29  7.035732E-3
+  17  30  1.266432E-1
+  17  31  1.527759E-1
+  17  32  3.779193E-1
+  17  33  1.027217E+0
+  17  34  1.055360E-1
+  17  36  8.161448E+0
+  18  24  3.000706E-4
+  18  25  3.000706E-3
+  18  26  1.000235E-4
+  18  27  1.100259E-2
+  18  28  2.500588E-2
+  18  29  2.000471E-3
+  18  30  7.001647E-3
+  18  32  2.400565E-2
+  18  33  2.660626E-1
+  18  34  4.000941E-2
+  18  35  2.000471E-4
+  18  36  1.600377E+1
+  19  24  9.575551E-4
+  19  25  5.745331E-3
+  19  26  2.872666E-4
+  19  27  2.393888E-2
+  19  28  2.776910E-2
+  19  29  2.872665E-3
+  19  30  1.723599E-2
+  19  31  3.255688E-2
+  19  32  2.681154E-2
+  19  33  2.221528E-1
+  19  34  2.298132E-2
+  19  36  9.048896E-1
+  20  28  1.758214E-2
+  20  29  9.767857E-4
+  20  34  1.367500E-2
+  20  36  2.275911E-1
+  21  28  2.396001E-2
+  21  29  1.996668E-3
+  21  34  1.896834E-2
+  21  36  5.250238E+0
+  22  36  7.218531E-1
+  23  36  1.380449E-2
+  24  36  3.117885E-3
+  25  36  3.047834E-2
+  26  36  5.950275E-4
+  27  36  9.695235E-2
+  28  28  1.493241E-2
+  28  36  8.063501E-2
+  29  35  1.039073E-4
+  29  36  6.234436E-3
+  30  36  8.095561E-2
+  31  36  8.177689E-2
+  32  36  2.385164E-1
+  33  36  5.733609E-1
+  34  35  2.001667E-3
+  34  36  5.304418E-2
+  35  36  2.305622E-3
+  36   4  9.157331E+1
+  36   5  7.553650E+1
+  36   7  3.672818E+1
+  36  10  5.000247E+1
+  36  11  9.798384E+0
+  36  12  9.076187E+2
+  36  13  2.663964E+1
+  36  15  1.607403E+2
+  36  16  1.365750E+0
+
+*vector bio-masses / Michigan
+*vertices 39
+ 1.028552E+1
+ 2.181199E+0
+ 2.441444E+1
+ 4.581332E-1
+ 7.557615E+0
+ 1.826558E+1
+ 7.327398E+0
+ 1.350445E-1
+ 1.000000E-9
+ 3.131966E+1
+ 3.931475E+0
+ 1.913253E+1
+ 2.002653E+0
+ 0.000000E+0
+ 1.605882E+0
+ 1.365966E+0
+ 1.717724E+0
+ 4.399035E+0
+ 4.692020E-1
+ 7.814285E-2
+ 1.975703E+0
+ 1.809632E-1
+ 2.465088E-2
+ 4.157179E-3
+ 4.978129E-2
+ 5.950275E-4
+ 9.895137E-2
+ 1.025359E-1
+ 7.273509E-3
+ 3.598027E-2
+ 5.684491E-2
+ 4.091704E-2
+ 1.146722E-1
+ 5.604668E-2
+ 4.611243E-4
+ 6.967728E+1
+ 0.000000E+0
+ 0.000000E+0
+ 0.000000E+0
+
diff --git a/data/pajek/Mondego.paj b/data/pajek/Mondego.paj
new file mode 100644
index 000000000..ada9200eb
--- /dev/null
+++ b/data/pajek/Mondego.paj
@@ -0,0 +1,553 @@
+% Web 41 Mondego Estuary - Zostrea site. 4
+% from datall.zip from http://www.cbl.cees.edu/~ulan/ntwk/network.html
+% Patricio, J. (In Preparation) Master's Thesis. University of Coimbra,
+% Coimbra, Portugal. Email: <joanapatricio@hotmail.com>.
+% transformed from SCOR format by Scor2net 14.7.2003
+*partition ECO types / mondego
+*vertices 46
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+2
+3
+4
+5
+
+*network mondego
+*vertices 46
+   1 "Phytoplankton"
+   2 "Enteromorpha sp"
+   3 "Ulva lactuca"
+   4 "Zostera"
+   5 "Epiphytes"
+   6 "Gracilaria"
+   7 "Zooplankton"
+   8 "Hydrobia ulvae"
+   9 "Melita palmata"
+  10 "Ampithoe ferox"
+  11 "Gibulla"
+  12 "Littorina"
+  13 "Cyathura carinata"
+  14 "Scrobicularia plana"
+  15 "Cerastoderma edule"
+  16 "Modiolus"
+  17 "Amage adspersa"
+  18 "Capitella capitata"
+  19 "Heteromastus filifor"
+  20 "Oligochaeta"
+  21 "Other detrivors"
+  22 "Nephtys"
+  23 "Other predatory inve"
+  24 "Idotea chelipes"
+  25 "Sphaeroma hookeri"
+  26 "Nereis diversicolor"
+  27 "Carcinus maenas"
+  28 "Crangon crangon"
+  29 "Lumbrineris impatien"
+  30 "Diopatra neapolitana"
+  31 "Microalgae and detri"
+  32 "Zooplankton consumer"
+  33 "Endofauna consumers"
+  34 "Macrofauna predators"
+  35 "Trigla lucerna"
+  36 "Pomatoschistus minut"
+  37 "Larus ridibundus"
+  38 "Larus fuscus"
+  39 "Kentish Plover"
+  40 "Ringed Plover"
+  41 "Grey Plover"
+  42 "Dunlin"
+  43 "Detritus"
+  44 "Input"
+  45 "Output"
+  46 "Respiration"
+*arcs
+  44   1    124.320000
+  44   2     12.219600
+  44   3      2.236201
+  44   4   1024.182000
+  44   5   2770.200000
+  44   6     96.485990
+  44  34      0.439820
+  44  37      0.000864
+  44  38      0.001080
+  43  45   1707.532000
+   1  46     62.160000
+   2  46      6.099600
+   3  46      1.118100
+   4  46    512.091200
+   5  46   1385.100000
+   6  46     48.243000
+   7  46      7.657237
+   8  46    142.350000
+   9  46      1.572783
+  10  46      2.739186
+  11  46      0.252683
+  12  46     22.398260
+  13  46      0.227360
+  14  46     11.734320
+  15  46     50.121260
+  16  46      0.088000
+  17  46      0.036800
+  18  46      0.028800
+  19  46      2.928000
+  20  46      0.662340
+  21  46      3.480000
+  22  46      0.717600
+  23  46      3.648834
+  24  46      0.456000
+  25  46      0.028500
+  26  46     14.544610
+  27  46     20.923830
+  28  46      2.379702
+  29  46      0.936000
+  30  46      0.377312
+  31  46     13.293070
+  32  46      1.559210
+  33  46      0.100800
+  34  46      2.257032
+  35  46      0.084000
+  36  46      0.155637
+  37  46      0.001032
+  38  46      0.000860
+  39  46      0.000172
+  40  46      0.000172
+  41  46      0.000172
+  42  46      0.000172
+   1   7     22.971710
+   1  14      4.400370
+   1  15     18.795480
+   1  16      0.033000
+   1  31      1.769040
+   1  43     14.190400
+   2   9      0.393196
+   2  10      0.684796
+   2  11      0.063171
+   2  12      3.733044
+   2  24      0.076000
+   2  27      0.917436
+   2  28      0.229992
+   2  43      0.022365
+   3   9      0.035388
+   3  10      0.061632
+   3  11      0.012634
+   3  12      0.746609
+   3  24      0.003800
+   3  27      0.190644
+   3  28      0.019827
+   3  43      0.047567
+   4  24      0.228000
+   4  43    511.863300
+   5   8    177.937500
+   5   9      2.752371
+   5  10      4.793575
+   5  11      0.347439
+   5  12     20.531740
+   5  24      0.114000
+   5  25      0.009500
+   5  43   1178.614000
+   6  24      0.190000
+   6  27      1.312617
+   6  28      0.067411
+   6  43     46.672970
+   7   7      2.552413
+   7  27      0.104730
+   7  28      0.186373
+   7  31      1.769040
+   7  32      2.493664
+   7  34      0.163795
+   7  35      0.009715
+   7  36      0.224365
+   7  43     10.362800
+   8  23      0.359053
+   8  26      9.823225
+   8  27      4.573213
+   8  28      0.007931
+   8  29      0.001814
+   8  30      0.056597
+   8  33      0.016166
+   8  34      0.015166
+   8  35      0.002211
+   8  37      0.000013
+   8  39      0.000140
+   8  40      0.000060
+   8  41      0.000059
+   8  42      0.000077
+   8  43    198.669300
+   9  22      0.004782
+   9  23      0.304283
+   9  27      0.209460
+   9  28      0.166546
+   9  29      0.001823
+   9  30      0.006289
+   9  34      0.045499
+   9  36      0.008313
+   9  39      0.000004
+   9  40      0.000013
+   9  41      0.000030
+   9  42      0.000030
+   9  43      1.612103
+  10  22      0.007173
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+  10  26      0.024255
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+  10  35      0.000010
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+  10  39      0.000006
+  10  40      0.000023
+  10  41      0.000051
+  10  42      0.000051
+  10  43      2.807665
+  11  23      0.006086
+  11  26      0.024918
+  11  27      0.034910
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+  11  33      0.000557
+  11  35      0.000003
+  11  43      0.286814
+  12  23      0.060857
+  12  26      0.436588
+  12  27      0.104730
+  12  28      0.003965
+  12  29      0.003629
+  12  33      0.001858
+  12  35      0.000100
+  12  43     14.320450
+  13  23      0.060857
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+  13  35      0.000140
+  13  43      0.229447
+  14  22      0.023910
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+  14  26      0.582117
+  14  27      3.491003
+  14  28      0.317230
+  14  29      0.054612
+  14  30      0.006289
+  14  33      0.004088
+  14  34      0.054598
+  14  35      0.000840
+  14  37      0.000461
+  14  38      0.000014
+  14  39      0.000014
+  14  40      0.000012
+  14  41      0.000024
+  14  42      0.000003
+  14  43     12.707210
+  15  22      0.062167
+  15  23      0.499023
+  15  26      0.921711
+  15  27      5.550694
+  15  28      0.491707
+  15  29      0.021845
+  15  30      0.006289
+  15  33      0.009848
+  15  34      0.090997
+  15  35      0.001424
+  15  37      0.000030
+  15  38      0.000009
+  15  39      0.000023
+  15  40      0.000024
+  15  42      0.000001
+  15  43     67.526110
+  16  22      0.001196
+  16  26      0.009702
+  16  28      0.003965
+  16  29      0.001560
+  16  33      0.000186
+  16  34      0.003033
+  16  43      0.112358
+  17  22      0.001196
+  17  23      0.002434
+  17  28      0.003965
+  17  33      0.000557
+  17  39      0.000003
+  17  43      0.047044
+  18  22      0.000478
+  18  27      0.006982
+  18  28      0.000793
+  18  29      0.003121
+  18  33      0.000372
+  18  37      0.000030
+  18  43      0.031424
+  19  22      0.181719
+  19  23      0.821563
+  19  24      0.001520
+  19  26      0.097020
+  19  27      0.174550
+  19  28      0.027758
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+  19  33      0.026014
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+  19  39      0.000002
+  19  40      0.000008
+  19  41      0.000007
+  19  42      0.000006
+  19  43      3.029941
+  20  23      0.182570
+  20  24      0.001520
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+  20  27      0.069820
+  20  28      0.027758
+  20  29      0.007802
+  20  33      0.000186
+  20  40      0.000012
+  20  43      0.679588
+  21  22      0.223563
+  21  23      0.791135
+  21  24      0.001520
+  21  26      0.169784
+  21  27      0.314190
+  21  28      0.039654
+  21  29      0.001560
+  21  30      0.044020
+  21  33      0.033447
+  21  34      0.090997
+  21  39      0.000006
+  21  40      0.000013
+  21  41      0.000012
+  21  42      0.000011
+  21  43      3.510089
+  22  22      0.005978
+  22  23      0.018257
+  22  27      0.174550
+  22  28      0.007931
+  22  33      0.000743
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+  22  39      0.000001
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+  22  43      0.255771
+  23  22      0.186501
+  23  23      0.578137
+  23  24      0.002280
+  23  27      0.174550
+  23  28      0.023792
+  23  29      0.001560
+  23  33      0.018581
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+  23  39      0.000002
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+  23  41      0.000005
+  23  42      0.000005
+  23  43      1.416797
+  24  23      0.060857
+  24  24      0.008360
+  24  28      0.043619
+  24  29      0.001560
+  24  34      0.030332
+  24  35      0.000140
+  24  41      0.000001
+  24  43      0.159130
+  25  23      0.006086
+  25  34      0.003033
+  25  43      0.009881
+  26  22      0.050212
+  26  23      0.212998
+  26  27      3.491003
+  26  28      0.721699
+  26  33      0.033447
+  26  34      0.094030
+  26  36      0.002231
+  26  37      0.000025
+  26  39      0.000020
+  26  40      0.000059
+  26  41      0.000032
+  26  42      0.000037
+  26  43      5.090613
+  27  27      1.640771
+  27  28      0.154650
+  27  33      0.006318
+  27  34      0.831108
+  27  35      0.042572
+  27  36      0.000623
+  27  37      0.000006
+  27  38      0.000094
+  27  39      0.000016
+  27  41      0.000014
+  27  42      0.000015
+  27  43     11.273040
+  28  27      0.349100
+  28  28      0.007931
+  28  33      0.022298
+  28  34      0.303324
+  28  35      0.061057
+  28  36      0.009856
+  28  37      0.000006
+  28  43      0.832896
+  29  22      0.004782
+  29  23      0.121713
+  29  27      0.069820
+  29  28      0.015862
+  29  33      0.007804
+  29  34      0.009100
+  29  39      0.000001
+  29  40      0.000002
+  29  41      0.000002
+  29  42      0.000001
+  29  43      0.394914
+  30  22      0.005978
+  30  23      0.048685
+  30  27      0.034910
+  30  28      0.015862
+  30  33      0.000372
+  30  34      0.009100
+  30  39      0.000001
+  30  41      0.000002
+  30  42      0.000002
+  30  43      0.136630
+  31  27      0.349100
+  31  28      0.019827
+  31  34      0.248726
+  31  37      0.000003
+  31  43      3.779672
+  32  27      0.174550
+  32  28      0.047585
+  32  34      0.181994
+  32  35      0.009803
+  32  37      0.000003
+  32  43      0.520519
+  33  27      0.034910
+  33  34      0.003033
+  33  43      0.047257
+  34  34      0.057632
+  34  35      0.001260
+  34  43      0.717316
+  35  34      0.006066
+  35  35      0.001342
+  35  43      0.048592
+  36  27      0.013964
+  36  33      0.001672
+  36  34      0.024266
+  36  35      0.009383
+  36  43      0.054473
+  37  43      0.000408
+  38  43      0.000340
+  39  43      0.000068
+  40  43      0.000068
+  41  43      0.000068
+  42  43      0.000068
+  43   8    177.937500
+  43   9      0.751004
+  43  10      1.307961
+  43  11      0.208464
+  43  12     12.319050
+  43  13      0.568400
+  43  14     24.935430
+  43  15    106.507700
+  43  16      0.187000
+  43  17      0.092000
+  43  18      0.072000
+  43  19      7.320000
+  43  20      1.655849
+  43  21      8.700001
+  43  22      0.436366
+  43  23      1.015695
+  43  24      0.133000
+  43  25      0.038000
+  43  26     12.127440
+  43  27     11.031570
+  43  28      0.971517
+  43  29      1.418354
+  43  30      0.503083
+  43  31     14.152320
+  43  33      0.001487
+  43  34      0.157729
+  43  38      0.000004
+
+*vector bio-masses / mondego
+*vertices 46
+     0.336000
+     1.800000
+     0.372700
+   204.836500
+     7.695000
+    16.080000
+     0.348000
+    54.750000
+     0.109221
+     0.236000
+     0.071785
+     2.488690
+     0.056000
+     3.259500
+     5.220900
+     0.022000
+     0.008000
+     0.006000
+     0.610000
+     0.127300
+     0.600000
+     0.052000
+     0.354600
+     0.040000
+     0.002500
+     0.865750
+     1.089780
+     0.132200
+     0.130000
+     0.019290
+     1.684800
+     0.335100
+     0.060000
+     0.314000
+     0.020000
+     0.030517
+     0.006000
+     0.005000
+     0.001000
+     0.001000
+     0.001000
+     0.001000
+   527.305700
+     0.000000
+     0.000000
+     0.000000
+
diff --git a/data/pajek/Narragan.paj b/data/pajek/Narragan.paj
new file mode 100644
index 000000000..49128d68a
--- /dev/null
+++ b/data/pajek/Narragan.paj
@@ -0,0 +1,341 @@
+% Web 42 Narragansett Bay Model, Aug 1994. (mgC/m2/year) 0
+% from datall.zip from http://www.cbl.cees.edu/~ulan/ntwk/network.html
+% Monaco, M.E. and R.E. Ulanowicz. 1997. Comparative ecosystem trophic
+% structure of three U.S. Mid-Atlantic estuaries.  Mar. Ecol. Prog. Ser.
+% 161:239-254.
+% transformed from SCOR format by Scor2net 14.7.2003
+*partition ECO types / Narragansett
+*vertices 35
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+2
+3
+4
+5
+
+*network Narragansett
+*vertices 35
+   1 "Bluefish"
+   2 "Striped Bass"
+   3 "Winter Flounder"
+   4 "Windowpane"
+   5 "Scup"
+   6 "Tautog"
+   7 "Dogfish"
+   8 "Skates"
+   9 "Longfin Squid"
+  10 "Butterfish"
+  11 "Menhaden"
+  12 "Bay Anchovy"
+  13 "Atl Silversides"
+  14 "Mummichog"
+  15 "Hard Clam"
+  16 "Cancer Crabs"
+  17 "Am. Lobster"
+  18 "Softshell Clam"
+  19 "Ben Macrofauna"
+  20 "Ben Meiofauna"
+  21 "Shrimp(Pal,Crg)"
+  22 "Ctenophores"
+  23 "Fish Larvae"
+  24 "Mesozooplankton"
+  25 "Microzooplankto"
+  26 "Hetero Microflag"
+  27 "Pelag Bacteria"
+  28 "SusPoc Bacteria"
+  29 "SedPOC Bacteria"
+  30 "Benthic Alage"
+  31 "Phytoplankton"
+  32 "Detritus"
+  33 "Input"
+  34 "Output"
+  35 "Respiration"
+*arcs
+  33  30 144760.00000
+  33  31 544635.60000
+  33  32   4450.00000
+   1  34     42.00000
+   2  34     42.00000
+   3  34     66.00000
+   4  34      3.77000
+   5  34    116.30000
+   6  34      3.94000
+   7  34      0.51000
+   8  34      6.66000
+   9  34      8.36000
+  10  34      8.68000
+  11  34     11.00000
+  12  34      0.00300
+  13  34     14.70000
+  14  34     14.70000
+  15  34     61.60000
+  16  34      1.52000
+  17  34     70.00000
+  18  34      0.15600
+  22  34     24.34000
+  23  34      3.84000
+  24  34    347.40000
+  25  34     83.26000
+  26  34     20.70000
+  27  34    230.00000
+  28  34     46.00000
+  29  34    138.00000
+  31  34    874.00000
+  32  34  75594.63000
+   1  35    321.26490
+   2  35     98.13600
+   3  35    391.87000
+   4  35    106.33000
+   5  35    504.00000
+   6  35    475.65000
+   7  35    163.80000
+   8  35    455.00000
+   9  35    166.32000
+  10  35    368.00000
+  11  35    406.00000
+  12  35    112.00000
+  13  35    874.80000
+  14  35   1200.00000
+  15  35   2952.00000
+  16  35   1768.50000
+  17  35    470.40000
+  18  35   1073.60000
+  19  35  15164.00000
+  20  35  35796.00000
+  21  35  19600.00000
+  22  35   1484.00000
+  23  35    136.94000
+  24  35 111773.30000
+  25  35  19548.00000
+  26  35  49409.99000
+  27  35  20000.00000
+  28  35  11500.00000
+  29  35  33360.00000
+  30  35  51700.00000
+  31  35 234852.00000
+   1  32    305.00380
+   2   1     20.04806
+   2   7     10.92000
+   2  32     57.31594
+   3   2      6.85260
+   3   7     10.92000
+   3  32    120.35740
+   4   7     10.92000
+   4  32     33.98000
+   5   2      9.13680
+   5  32    170.56320
+   6   1     60.14418
+   6   2     11.42100
+   6   7      6.55200
+   6  32    197.29280
+   7  32     54.09000
+   8   7     10.92000
+   8  32    177.42000
+   9   1     46.77881
+   9   7     10.92000
+   9   9     15.62000
+   9  32     64.40119
+  10   1    167.06720
+  10   2     57.10500
+  10   7     43.68000
+  10   9     71.85200
+  10  32    387.61580
+  11   1    233.89400
+  11   2     22.84200
+  11   9     15.62000
+  11  32    180.64400
+  12   1     33.41343
+  12   2     27.41040
+  12   9     15.62000
+  12  32     51.55317
+  13   1     33.41343
+  13   2     11.42100
+  13   9     21.86800
+  13  16    137.55000
+  13  17     43.20000
+  13  32    294.04760
+  14   1     40.09612
+  14   2     20.55780
+  14   3     59.60000
+  14   7      4.36800
+  14  16    137.55000
+  14  17     43.20000
+  14  32    479.92810
+  15   2     22.84200
+  15   3     11.92000
+  15  32   1391.63800
+  16   1     33.41343
+  16   2     22.84200
+  16   3     17.88000
+  16   5     80.00000
+  16   7     21.84000
+  16   8     65.00000
+  16  17    172.80000
+  16  32    567.20460
+  17   6    113.25000
+  17  32    210.35000
+  18  16    137.55000
+  18  17     43.20000
+  18  32    697.49400
+  19   2     15.98940
+  19   3    357.60000
+  19   4     20.15000
+  19   5    480.00000
+  19   6    453.00000
+  19   7     21.84000
+  19   8    390.00000
+  19  14    400.00000
+  19  16    687.75000
+  19  17    302.40000
+  19  32  17387.27000
+  20   4      9.30000
+  20   5     80.00000
+  20  16    550.20000
+  20  19   3568.00000
+  20  21   4200.00000
+  20  32  12796.50000
+  21   3    149.00000
+  21   4    125.55000
+  21   5    160.00000
+  21   6    188.75000
+  21   7     21.84000
+  21   8    195.00000
+  21   9    171.82000
+  21  10    607.20000
+  21  14    400.00000
+  21  16    550.20000
+  21  17    259.20000
+  21  19   3568.00000
+  21  32  16003.44000
+  22   7     43.68000
+  22  10    220.80000
+  22  32   1407.18000
+  23  22    318.00000
+  23  32    159.12000
+  24  10    165.60000
+  24  12    216.00000
+  24  13   1287.90000
+  24  14    800.00000
+  24  15    444.00000
+  24  19   7136.00000
+  24  20   5700.00000
+  24  21   8400.00000
+  24  22   2544.00000
+  24  23    247.16000
+  24  24  21146.30000
+  24  32  51255.34000
+  25  15    444.00000
+  25  18    390.40000
+  25  20   5700.00000
+  25  22    318.00000
+  25  23     61.79000
+  25  24  21146.30000
+  25  32  17468.25000
+  26  25  26064.00000
+  26  32  77505.30000
+  27  25  13032.00000
+  27  26  91800.00000
+  27  32 274938.00000
+  28  26  22950.00000
+  28  32  45504.00000
+  29  26  22950.00000
+  29  32 691152.00000
+  30  14    200.00000
+  30  15    888.00000
+  30  19   3568.00000
+  30  24  21146.30000
+  30  32  67257.70000
+  31  10    110.40000
+  31  11    783.00000
+  31  13    143.10000
+  31  15   2220.00000
+  31  18   1561.60000
+  31  19  10704.00000
+  31  20  11400.00000
+  31  21  12600.00000
+  31  23    308.95000
+  31  24 126877.80000
+  31  25  13032.00000
+  31  32 129389.10000
+  32  11     87.00000
+  32  12     24.00000
+  32  14    200.00000
+  32  15    444.00000
+  32  16    550.20000
+  32  19   7136.00000
+  32  20  34200.00000
+  32  21  16800.00000
+  32  24  21146.30000
+  32  25  13032.00000
+  32  26  15300.00000
+  32  27 400000.00000
+  32  28  80000.00000
+  32  29 747600.00000
+
+*vector bio-masses / Narragansett
+*vertices 35
+   251.00
+   141.00
+   149.00
+    31.00
+   160.00
+   151.00
+    84.00
+   130.00
+    44.00
+   184.00
+   145.00
+    40.00
+   135.00
+   200.00
+   300.00
+   393.00
+   120.00
+   244.00
+  4460.00
+  1140.00
+  1400.00
+   106.00
+    16.70
+  1510.45
+   362.00
+    90.00
+  1000.00
+   200.00
+   600.00
+   330.00
+  3800.00
+253400.00
+     0.00
+     0.00
+     0.00
+
diff --git a/data/pajek/Rhode.paj b/data/pajek/Rhode.paj
new file mode 100644
index 000000000..ff5db9ab5
--- /dev/null
+++ b/data/pajek/Rhode.paj
@@ -0,0 +1,129 @@
+% Web 32 Rhode River Watershed - Water Budget 3/81 - 2/82; D. Correll Et Al.
+% from datall.zip from http://www.cbl.cees.edu/~ulan/ntwk/network.html
+% Water exchanges in the Rhode River Watershed, Anne Arundel County, Maryland USA.
+% Correll, D. (Unpublished manuscript) Smithsonian Institute, Chesapeake
+% Bay Center for Environmental Research, Edgewater, Maryland 21037-0028 USA.
+% transformed from SCOR format by Scor2net 15.7.2003
+*partition ECO types / Rhode
+*vertices 20
+2
+2
+2
+2
+2
+2
+2
+2
+2
+2
+2
+2
+2
+2
+2
+2
+2
+3
+4
+5
+
+*network Rhode
+*vertices 20
+   1 "crop land"
+   2 "pasture land"
+   3 "upland forest"
+   4 "riparian forest adj. crop"
+   5 "riparian forest adj. past"
+   6 "riparian forest adj. upla"
+   7 "flooded swamp forest"
+   8 "herbaceous wetland"
+   9 "floodplain forest"
+  10 "main fork"
+  11 "low marsh adj. north fork"
+  12 "low marsh adj. main fork"
+  13 "north fork"
+  14 "muddy creek"
+  15 "mud flat"
+  16 "high marsh"
+  17 "low marsh adj. muddy cree"
+  18 "Input"
+  19 "Output"
+  20 "Respiration"
+*arcs
+  18   1  83170.0
+  18   2  20040.0
+  18   3   6630.0
+  18   4   5170.0
+  18   5   2800.0
+  18   6   4850.0
+  18   7     67.0
+  18   8     67.0
+  18   9    660.0
+  18  11     44.5
+  18  12     12.1
+  18  14     30.0
+  18  15  43850.0
+  18  16    391.0
+  18  17    172.0
+   1  19  44900.0
+   2  19   9120.0
+  15  19  44500.0
+   1   4  20500.0
+   2   5    460.0
+   3   6    540.0
+   4   7   3520.0
+   4  10     33.7
+   4  13   1080.0
+   4  15    179.0
+   5   7    282.0
+   5  13    378.0
+   5  15      1.0
+   6   7    269.0
+   6  10     17.6
+   6  13    413.0
+   6  14     83.8
+   6  15    130.0
+   7   8    630.0
+   7   9    100.0
+   7  10   2880.0
+   8  10    700.0
+   9  10     30.0
+  10   8    317.0
+  10  12    609.0
+  10  14   4000.0
+  11  13   2200.0
+  12  10    601.0
+  13  11   2230.0
+  13  14   2500.0
+  14  10    650.0
+  14  13    600.0
+  14  15   8000.0
+  14  17   8670.0
+  15  14   2800.0
+  15  16   8760.0
+  16  15   9600.0
+  17  14   8550.0
+
+*vector bio-masses / Rhode
+*vertices 20
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     1.0
+     0.0
+     0.0
+     0.0
+
diff --git a/data/pajek/StMarks.paj b/data/pajek/StMarks.paj
new file mode 100644
index 000000000..3f21e0222
--- /dev/null
+++ b/data/pajek/StMarks.paj
@@ -0,0 +1,537 @@
+% Web 43 St. Marks River (Florida) Flow network janfeb.dat;mgC/m2 day   6
+% from datall.zip from http://www.cbl.cees.edu/~ulan/ntwk/network.html
+% St Marks River (Florida) Estuary
+% Baird, D., J. Luczkovich and R. R. Christian. 1998. Assessment of
+% spatial and temporal variability in ecosystem attributes of the St
+% Marks National Wildlife Refuge, Apalachee Bay, Florida.   Estuarine,
+% Coastal, and Shelf Science 47: 329-349.
+% <http://drjoe.biology.ecu.edu/stmarks/stmarks.htm>.
+% transformed from SCOR format by Scor2net 15.7.2003
+*partition ECO types / StMarks
+*vertices 54
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+2
+2
+2
+3
+4
+5
+
+*network StMarks
+*vertices 54
+   1 "Phytoplankton"
+   2 "Halodule"
+   3 "Micro-epiphytes"
+   4 "Macro-epiphytes"
+   5 "Benthic algae"
+   6 "Bacterio plankton"
+   7 "Micro protozoa"
+   8 "Zooplankton"
+   9 "Epiphyte-graz amphipods"
+  10 "suspension-feed molluscs"
+  11 "Suspension-feed polychts"
+  12 "Benthic bact"
+  13 "Microfauna"
+  14 "Meiofauna"
+  15 "Deposit feed amphipods"
+  16 "Detritus feed crust."
+  17 "Hermit crab"
+  18 "Spider crab"
+  19 "Omnivorous crabs"
+  20 "Blue crab"
+  21 "Isopod"
+  22 "Brittle stars"
+  23 "Herbivorous shrimp"
+  24 "Predatory shrimp"
+  25 "Deposit-feed gastropod"
+  26 "Deposit-feed polycht"
+  27 "Predatory polycht"
+  28 "Predatory gastropod"
+  29 "Epiphyte-graz gastropod"
+  30 "Other gastropods"
+  31 "Catfish & stingrays"
+  32 "Tongue fish"
+  33 "Gulf flound & needle fish"
+  34 "Southrn hake & sea robins"
+  35 "Atl. silverside & bay anc"
+  36 "Gobies & blennies"
+  37 "Pinfish"
+  38 "Spot"
+  39 "Pipefish & seahorses"
+  40 "Sheepshead minnow"
+  41 "Red Drum"
+  42 "Killifish"
+  43 "Herbivorous ducks"
+  44 "Benthos-eating birds"
+  45 "Fish-eating birds"
+  46 "Fish & crust. eating bird"
+  47 "Gulls"
+  48 "Raptors"
+  49 "DOC"
+  50 "Suspended POC"
+  51 "Sediment POC"
+  52 "Input"
+  53 "Output"
+  54 "Respiration"
+*arcs
+  52   1     28.3100000
+  52   2     41.5200000
+  52   3    265.0300000
+  52   4      4.5200000
+  52   5    169.9500000
+  52   8      0.6930000
+  52   9      2.2840000
+  52  10      1.3880000
+  52  11      0.1840000
+  52  12     44.9830000
+  52  13      1.3300000
+  52  15      0.0640000
+  52  23      1.1070000
+  52  25      8.2090000
+  52  26      1.8250000
+  52  27      0.4290000
+  52  30      0.6640000
+  52  31      8.5000000
+  52  33      0.1730000
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+  49  53     37.0100000
+  50  53     13.6920000
+  51  53     68.4773500
+   1  54     12.3100000
+   2  54     20.7700000
+   3  54    115.2300000
+   4  54      1.9700000
+   5  54     62.9500000
+   6  54     15.4900000
+   7  54      6.4200000
+   8  54      0.3399999
+   9  54      6.2600070
+  10  54      2.1000000
+  11  54      0.2400000
+  12  54     89.8003500
+  13  54      4.9200130
+  14  54     43.8601200
+  15  54      6.8300180
+  16  54      0.3700009
+  17  54     12.7300300
+  18  54      2.3000000
+  19  54     13.4400300
+  20  54      0.9600008
+  21  54      9.2100000
+  22  54      4.6900120
+  23  54      0.8699999
+  24  54      1.6700020
+  25  54     10.9800200
+  26  54      0.7500010
+  27  54      3.6900080
+  28  54      4.8400050
+  29  54      0.0700000
+  30  54      0.3000000
+  31  54      3.0900010
+  32  54      0.2600003
+  33  54      0.6400005
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+  35  54      0.3300003
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+  38  54      1.0600010
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+   1   7      6.8800000
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+   1  10      2.8300000
+   1  11      1.4500000
+   1  49      4.0000000
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+   2  21      6.9100000
+   2  23      1.5500000
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+   2  31      0.1000000
+   2  43      0.0420000
+   2  49      0.4200000
+   2  51      1.8780000
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+   3  19      1.0800000
+   3  21      6.9000000
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+   3  24      0.2000000
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+   3  40      0.5750000
+   3  49     37.4500000
+   3  51     99.1950000
+   4  42      0.0450000
+   4  43      0.0020000
+   4  49      0.6400000
+   4  51      1.8630000
+   5   9      3.4200000
+   5  13      2.7000000
+   5  14     24.2400000
+   5  15      3.8900000
+   5  16      0.2100000
+   5  17     10.1600000
+   5  18      0.1800000
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+   5  25     10.9400000
+   5  26      0.4400000
+   5  35      0.0500000
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+   5  38      0.6500000
+   5  39      0.0080000
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+   5  49     26.7500000
+   5  51     17.6720000
+   6   7      6.8800000
+   6   8      0.0500000
+   6  10      0.5000000
+   6  50      9.3300000
+   7   7      0.6399999
+   7   8      0.0300000
+   7  10      0.2100000
+   7  50      8.6999990
+   8  11      0.1999999
+   8  33      0.3399999
+   8  34      0.0020000
+   8  36      0.0050000
+   8  37      0.3199999
+   8  38      0.0600000
+   8  39      0.0080000
+   8  40      0.0070000
+   8  42      0.0010000
+   8  50      0.1999999
+   9  19      1.5100020
+   9  24      0.4700005
+   9  27      0.2700003
+   9  32      0.9200009
+   9  35      0.2100002
+   9  36      0.0100000
+   9  37      0.1200001
+   9  38      0.2900003
+   9  39      0.1080001
+   9  40      0.0140000
+   9  41      0.0790001
+   9  42      0.0030000
+   9  50      3.4300040
+  10  20      0.1500000
+  10  24      0.1300000
+  10  27      0.2700000
+  10  28      1.2000000
+  10  36      0.0050000
+  10  43      0.0010000
+  10  44      0.0120000
+  10  51      1.0600000
+  11  19      0.2200000
+  11  24      0.0300000
+  11  35      0.0100000
+  11  44      0.0040000
+  11  51      1.3300000
+  12   9      3.4200130
+  12  13     10.1300400
+  12  14     65.9402500
+  12  15      6.0400240
+  12  16      0.3200012
+  12  17     10.1600400
+  12  19      8.6200330
+  12  22      8.4000320
+  12  24      0.1000004
+  12  25     11.4000400
+  12  26      0.9400036
+  12  27      0.8100032
+  12  37      0.0400002
+  12  40      0.0500002
+  12  42      0.0130001
+  12  51     31.5001200
+  13  13      0.6800019
+  13  14      3.8800110
+  13  15      0.3100008
+  13  16      0.0200001
+  13  17      0.2100006
+  13  22      0.4200011
+  13  25      0.2300006
+  13  26      0.0300001
+  13  27      0.0900003
+  13  51      4.0500120
+  14  14      2.9100070
+  14  17      0.7500020
+  14  24      0.0700002
+  14  25      0.2300006
+  14  26      0.3300009
+  14  27      4.3100110
+  14  33      0.1000003
+  14  36      0.0300001
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+  14  38      1.2900030
+  14  39      0.1600004
+  14  40      0.0070000
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+  14  51     42.0661100
+  15  19      0.6500018
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+  15  27      0.0900002
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+  15  35      0.1200003
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+  15  42      0.0020000
+  15  51      1.5300040
+  16  51      0.1800004
+  17  19      1.0800020
+  17  20      0.5200011
+  17  31      0.2900006
+  17  34      0.0020000
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+  17  44      0.0320001
+  17  46      0.0050000
+  17  47      0.0600001
+  17  51      6.5000140
+  18  20      0.5000001
+  18  47      0.0400000
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+  19  20      0.0100000
+  19  24      0.1000002
+  19  31      0.1000002
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+  19  41      0.0610001
+  19  44      0.0080000
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+  19  51      7.8300160
+  20  47      0.0100000
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+  21  36      0.0100000
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+  21  51      4.5500000
+  22  35      0.0400001
+  22  51      9.2700230
+  23  20      0.1200000
+  23  24      0.7100000
+  23  31      0.1000000
+  23  34      0.1160000
+  23  35      0.1300000
+  23  38      0.1600000
+  23  39      0.0120000
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+  24  20      0.1800002
+  24  41      0.0730001
+  24  46      0.0020000
+  24  47      0.0100000
+  24  51      1.4250020
+  25  19      1.9400030
+  25  24      0.2400004
+  25  27      2.3300030
+  25  28      6.1000090
+  25  43      0.0130000
+  25  44      0.2960005
+  25  51      9.1100130
+  26  19      0.4300006
+  26  24      0.4000005
+  26  27      0.7200010
+  26  31      0.1000001
+  26  35      0.0500001
+  26  37      0.0600001
+  26  38      0.2900004
+  26  39      0.0040000
+  26  41      0.0550001
+  26  44      0.0160000
+  26  51      0.6900009
+  27  19      0.6500013
+  27  24      0.6400014
+  27  31      0.2000004
+  27  35      0.0800002
+  27  37      0.1000002
+  27  38      0.3600008
+  27  39      0.0080000
+  27  41      0.0670001
+  27  44      0.0240001
+  27  51      3.5900080
+  28  34      0.0830001
+  28  51      4.3070040
+  29  44      0.0040000
+  29  51      0.1660000
+  30  27      0.0900000
+  30  28      0.6499999
+  30  44      0.0040000
+  30  51      0.1000000
+  31  48      0.0720000
+  31  51      6.4280020
+  32  51      1.1400020
+  33  28      0.1800002
+  33  45      0.0500000
+  33  48      0.0230000
+  33  51      0.9700008
+  34  28      0.0900000
+  34  46      0.0050000
+  34  51      0.1160000
+  35  28      0.0900001
+  35  46      0.0050000
+  35  47      0.0100000
+  35  51      0.4950005
+  36  46      0.0010000
+  36  51      0.0490001
+  37  33      0.0700001
+  37  42      0.0010000
+  37  46      0.0010000
+  37  51      1.1600020
+  38  28      0.6500006
+  38  31      0.2000002
+  38  33      1.1800010
+  38  35      0.2400002
+  38  41      0.0790001
+  38  42      0.0090000
+  38  45      0.3000003
+  38  46      0.0310000
+  38  51      1.6400020
+  39  51      0.2700005
+  40  28      0.1800001
+  40  41      0.0370000
+  40  46      0.0100000
+  40  47      0.0100000
+  40  48      0.0020000
+  40  51      0.4000002
+  41  51      0.3300004
+  42  28      0.0900001
+  42  41      0.0060000
+  42  46      0.0030000
+  42  51      0.0400000
+  44  48      0.0080000
+  49   6     32.2500000
+  50   7      1.6000000
+  50  51      6.4980010
+  51  12    202.7010000
+
+*vector bio-masses / StMarks
+*vertices 54
+    71.0999900
+  4963.0000000
+   230.9000000
+    94.5800000
+  1073.5000000
+    10.8900000
+     6.4200000
+     2.7799990
+    71.5000800
+    41.5000000
+     7.4599990
+   262.2510000
+    90.1302500
+  1062.3830000
+    34.4100900
+     2.5100060
+   248.0105000
+    37.0200000
+   226.9205000
+    14.3300100
+    64.5300000
+   375.0009000
+    28.3200000
+    57.4900700
+  1102.7620000
+    54.6300700
+   296.6806000
+   437.9904000
+     6.8100000
+    19.8200000
+   352.7301000
+     2.4100030
+    59.0200500
+     8.9600020
+    11.2500100
+     0.8100013
+     2.6000040
+    89.0300900
+     2.3500040
+     8.3900040
+    35.3600400
+     2.2600010
+     0.3500001
+     1.8900030
+    36.9300100
+     1.1700000
+     7.1700020
+     1.8500010
+  4082.5000000
+   669.7501000
+364501.8000000
+     0.0000000
+     0.0000000
+     0.0000000
+
diff --git a/src/EcologicalNetworks.jl b/src/EcologicalNetworks.jl
index 95bda69c7..6252368dc 100644
--- a/src/EcologicalNetworks.jl
+++ b/src/EcologicalNetworks.jl
@@ -35,7 +35,7 @@ export AbstractEcologicalNetwork,
 
 # Datasets
 include(joinpath(".", "misc/data.jl"))
-export web_of_life, nz_stream_foodweb
+export web_of_life, nz_stream_foodweb, pajek
 
 # Mangal -- only exports `convert` methods
 #using Mangal
diff --git a/src/misc/data.jl b/src/misc/data.jl
index 1995e1480..3ef619a30 100644
--- a/src/misc/data.jl
+++ b/src/misc/data.jl
@@ -43,3 +43,72 @@ function web_of_life()
   infos = [NamedTuple{tuple(names...)}(tuple(wol_infos[i,:]...)) for i in 2:size(wol_infos,1)]
   return infos
 end
+
+function pajek(file)
+    pajek_lines = readlines(file)
+    filter!(line -> !startswith(line, "% "), pajek_lines)
+    FLAG_vertices = false
+    FLAG_arcs = false
+    FLAG_read = false
+    nodes = Dict{Any,Any}()
+    arcs = Any[]
+    for line in pajek_lines
+        if startswith(line, "*network ")
+            FLAG_read = true
+        end
+        if FLAG_read
+            # What are we reading?
+            if startswith(line, "*vertices ")
+                FLAG_vertices = true
+                FLAG_arcs = false
+                continue
+            end
+            if startswith(line, "*arcs ")
+                FLAG_vertices = false
+                FLAG_arcs = true
+                continue
+            end
+            # Reading the line
+            if FLAG_vertices
+                nodematch = match(r"\s+(\d+)\s+\"(.+)\"", line)
+                if typeof(nodematch) <: Nothing
+                    FLAG_vertices = false
+                    FLAG_arcs = true
+                    continue
+                else
+                    nodeid, nodename = nodematch.captures
+                    nodes[nodeid] = nodename
+                end
+            end
+            if FLAG_arcs
+                arcmatch = match(r"\s+(\d+)\s+(\d+)\s+(.+)\s?", line)
+                if typeof(arcmatch) <: Nothing
+                    continue
+                else
+                    nodefrom, nodeto, nodestrength = arcmatch.captures
+                    push!(arcs, (nodefrom, nodeto, nodestrength))
+                end
+            end
+        end
+    end
+    S = length(nodes)
+    A = zeros(Float64, (S, S))
+    U = UnipartiteQuantitativeNetwork(A, String.(collect(values(nodes))))
+    for arc in arcs
+        U[string(nodes[string(arc[1])]), string(nodes[string(arc[2])])] = parse(Float64, arc[3])
+    end
+    return U
+ end
+
+ function pajek()
+    data_path = joinpath(@__DIR__, "../..", "data", "pajek")
+    files = readdir(data_path)
+    filter!(f -> endswith(f, ".paj"), files)
+    networks = Dict{Symbol,UnipartiteQuantitativeNetwork}()
+    for f in files
+       fname = Symbol(first(split(f, ".paj")))
+       fpath = joinpath(data_path, f)
+       networks[fname] = pajek(fpath)
+    end
+    return networks
+ end
diff --git a/test/data.jl b/test/data.jl
index 85abdabd1..90132547d 100644
--- a/test/data.jl
+++ b/test/data.jl
@@ -14,6 +14,7 @@ module TestData
     @test typeof(n) <: AbstractUnipartiteNetwork
   end
 
-
+   p = pajek()
+   @test typeof(p[:Chesapeake]) <: UnipartiteQuantitativeNetwork
 
 end