Chris Beer created MARMOTTA-504:
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Summary: LDPath should have a null-coalescing selector
Key: MARMOTTA-504
URL: https://issues.apache.org/jira/browse/MARMOTTA-504
Project: Marmotta
Issue Type: New Feature
Components: LDPath
Reporter: Chris Beer
Several LDPath programs I am working on would benefit from a null-coalescing
selector (where the left-most existing match is returned by the selector), e.g.
when there is a schema-defined titled type, but falling back to a more generic
type would be better than no value at all, e.g.
{code}
name = madsrdf:authoritativeLabel || foaf:name || skos:prefLabel :: xsd:string;
{code}
The existing Union operator does deduplicate values, but in my use cases, the
values are possibly not identical.
Here's a pull request to add the selector:
https://github.com/apache/marmotta/pull/5
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