in DCAT implementation allow mapping between value domains

[mhogeweg]

The specific domains for several elements of Project Open Data Metadata Schema v1.1 differ from the typical domains for the corresponding metadata element in ISO or FGDC metadata. Geoportal Server could allow defining a mapping between the values found in the geospatial metadata to values to be used in Project Open Data Metadata Schema v1.1.

For example, FGDC CSDGM records with secclass values “Medium Confidentiality” and “No Confidentiality” are currently mapping to “non-public”.

A suggested approach is to include mapping in dcat-mappings.xml that use a regex to find values in the source metadata and map those to a target value to be included in the output json file.

[pandzel-zz]

dcat-mappings.xml allows to define domain values mappings. For each string field it is possible to include <map from="" to=""/> collection of nodes. Each "from" is a regular expression matching input value (coming from the index) and "to" is output value printed to the DCAT json. Also, "to" might have value of "*" to indicate to pass original input value right to the output. Example:

<field name="accessLevel" index="accessLevel" required="true">
   <map from=".restricted." to="restricted public"/>
   <map from="Medium Confidentiality" to="restricted public"/>
   <map from="No Confidentiality" to="restricted public"/>
   <map from="private|confidential|secret" to="non-public"/>
   <map from=".*" to="public"/>
</field>