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In R2RML a graph map always generates an IRI. However in RDF there is no such requirement. See also the draft https://www.w3.org/TR/rdf12-concepts/#dfn-graph-name.
Should RML allow graphs with blan…
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#### What Happens?
When transforming data from a relational database no triples are generated when using the RML terms for the logical source, However, when changing those mappings for using the R2R…
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I was contacted by the chairs of the [Knowledge Graph Construction CG](https://www.w3.org/community/kg-construct/), who would like to create a Working Group. The WG is producing a set of specification…
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For post-processing data I often create some shell-pipe-hacks where I post-process data mapped from ugly CSV files. This is not very portable as its outside the RML mapping language.
Christophe Debru…
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Is anyone aware of any **online** R2RML parsers that I can feed it the example tables (any format - json, csv, anything) and the R2RML rules and see the triples generated?
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### Issue type: :question: Question
Hi. We have some YARRRML mappings that we export as RML for use with a custom RMLMapper implementation.
Now we would like to reuse the mappings as R2RML and fee…
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This issue follows https://github.com/DDMAL/linkedmusic-datalake/issues/104. And it's closely related with https://github.com/DDMAL/linkedmusic-datalake/issues/67
Over time, we have become uncertai…
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### Description
I have set up a conversion from CSV files to RDF, using the latest available versions of DuckDB and its JDBC driver. Using the the ontop CLI, it does not materialize but stalls with…
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If there is more than one join, what is the order of execution? (Remark of @pmaria moved from spec to issues)
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These extension have already been added to [r2rml model extensions](https://github.com/SmartDataAnalytics/r2rml-api-jena/blob/develop/r2rmlx-jena-api/src/main/java/org/aksw/r2rmlx/domain/api/Constrain…