Python script that converts D2RQ mapping documents to R2RML mapping documents
You can run a conversion by executing the following command:
python D2RQ_to_R2RML.py -i <inputFile> -o <ouptutFile>
With
<inputFile> = The D2RQL mapping document
<outputFile> = The corresponding R2RML mapping document
Non-supported D2R(Q) Classes and Propertes (because they are out-of-scope for R2RML):
d2r:Server
d2rq:Database
| D2RQ | R2RML |
|---|---|
| d2rq:ClassMap | rr:TriplesMap |
| d2rq:PropertyBridge | rr:PredicateObjectMap |
| d2rq:class | rr:class |
| d2rq:uriPattern | rr:template |
| rr:logicalTable (deducted from uriPattern of ClassMap) | |
| d2rq:belongsToClassMap | ~rr:predicateObjectMap (inverse) |
| d2rq:refersToClassMap | |
| d2rq:property | rr:predicate |
| d2rq:properties | rr:predicate .., ..,.. |
| d2rq:dynamicProperty | rr:PredicateMap |
| d2rq:constantValue | rr:constant |
| d2rq:column | rr:column |
| d2rq:uriColumn | rr:column "..." ; rr:termType rr:IRI |
| d2rq:datatype | rr:datatype |
| d2rq:lang | rr:language |
| d2rq:pattern | rr:template "...", rr:termType rr:Literal |
| d2rq:uriColumn | rr:column "...", rr:termType rr:IRI |
| d2rq:refersToClassMap | rr:parentTriplesMap |
| d2rq:join | rr:joinCondition (only if equality) |
| d2rq:condition | rr:joinCondition (only if equality) |
| d2rq:bNodeIdColumns | rr:termType rr:BlankNode (not supported yet) |
| d2rq:Configuration | -- (out of scope for R2RML) |
| d2rq:Database | -- (out of scope for R2RML) |
| d2rq:DownloadMap | -- (out of scope for R2RML) |
| d2rq:AdditionalProperty | -- (schema definition oriented) |
| d2rq:Translation | -- (not supported in R2RML) |
| d2rq:TranslationTable | -- (not supported in R2RML) |
| d2rq:alias | -- (out of scope in R2RML) |
| d2rq:dataStorage | -- (out of scope for R2RML) |
| d2rq:containsDuplicates | -- (out of scope for R2RML) |
| d2rq:classDefinitionLabel | -- (out of scope - schema definition oriented) |
| d2rq:classDefinitionComment | -- (out of scope - schema definition oriented) |
| d2rq:propertyDefinitionLabel | -- (out of scope - schema definition oriented) |
| d2rq:propertyDefinitionComment | -- (out of scope - schema definition oriented) |
| d2rq:sqlExpression | -- (not supported in R2RML) |
| d2rq:uriSqlExpression | -- (not supported in R2RML) |
| d2rq:limit | -- (not supported in R2RML) |
| d2rq:limitInverse | -- (not supported in R2RML) |
| d2rq:orderAsc | -- (out of scope for R2RML) |
| d2rq:orderDesc | -- (out of scope for R2RML) |
| d2rq:valueMaxLength | -- (out of scope for R2RML) |
| d2rq:valueContains | -- (out of scope for R2RML) |
| d2rq:valueRegex | -- (out of scope for R2RML) |
More information about the solution can be found at http://rml.io
This application is developed by Multimedia Lab http://www.mmlab.be
Copyright 2015, Multimedia Lab - Ghent University - iMinds
The RMLProcessor is released under the terms of the MIT license.