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Refined set syntax and more #17

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Mar 28, 2016
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Refined set syntax and more #17

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86672fa
Updating data-model-logical.svg
tsandall Mar 24, 2016
d42bf83
Refine set syntax and more
tsandall Mar 24, 2016
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28 changes: 14 additions & 14 deletions docs/CONCEPTS.md
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Original file line number Diff line number Diff line change
Expand Up @@ -86,11 +86,11 @@ Content-Type: text/plain

package opa.examples

violations[] = server :-
server = data.servers[]
server.protocols[] = "http"
server.ports[] = data.ports[i].id
data.ports[i].networks[] = data.networks[j].id
violations[server] :-
server = data.servers[_]
server.protocols[_] = "http"
server.ports[_] = data.ports[i].id
data.ports[i].networks[_] = data.networks[j].id
data.networks[j].public = true
```

Expand Down Expand Up @@ -190,7 +190,7 @@ Conceptually, there are two kinds of documents in OPA:

When defining policies, rules are written which contain expressions that reference documents. The language that rules are written in ("Opalog") lets you reference base documents and virtual documents in exactly the same way.

<img src="https://cdn.rawgit.com/open-policy-agent/opa/9f5f1e6fa68fd0ee627122b9e5c8809519e5bba8/docs/data-model-logical.svg" />
<img src="https://cdn.rawgit.com/open-policy-agent/opa/86672fab147c476cb8e8b0950b6c4fd48b5b2014/docs/data-model-logical.svg" />

## <a name="policies"></a> Policies

Expand Down Expand Up @@ -243,15 +243,15 @@ import data.servers # import the data.servers docume
import data.networks # same but for data.networks
import data.ports # same but for data.ports

violations[] = server :- # a server exists in the violations set if:
server = servers[] # the server exists in the servers collection
server.protocols[] = "http" # and the server has http in its protocols collection
public_servers[] = server # and the server exists in the public_servers collection
violations[server] :- # a server exists in the violations set if:
server = servers[_], # the server exists in the servers collection
server.protocols[_] = "http", # and the server has http in its protocols collection
public_servers[server] # and the server exists in the public_servers set

public_servers[] = server :- # a server exists in the public_servers set if:
server = servers[] # the server exists in the servers collection
server.ports[] = ports[i].id # and the server is connected to a port in the ports collection
ports[i].networks[] = networks[j].id # and the port is connected to a network in the networks collection
public_servers[server] :- # a server exists in the public_servers set if:
server = servers[_], # the server exists in the servers collection
server.ports[_] = ports[i].id, # and the server is connected to a port in the ports collection
ports[i].networks[_] = networks[j].id, # and the port is connected to a network in the networks collection
networks[j].public = true # and the network is public
```

Expand Down
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