How to use property path in graphdb lucene connector

Question

I am creating a graphdb lucene connector having a field that traverses all reachable locatedInside relationships for a node and indexes the labels.

{
      "indexed": true,
      "stored": true,
      "multivalued": true,
      "analyzed": true,
      "fieldName": "Parentlabel",
      "propertyChain": [
        "(<http://ontologies.acme.com/core#locatedInside>+)",
        "http://www.w3.org/2000/01/rdf-schema#label"
      ],
    }

However no vale is indexed for this field. It works fine if i just use one level in property chain

"propertyChain": [
        "http://ontologies.acme.com/core#locatedInside",
        "http://www.w3.org/2000/01/rdf-schema#label"
      ]

Does lucene connector in graphdb not allow using path language

Damyan Ognyanov · Accepted Answer · 2019-02-28 07:32:40Z

0

Yes, propertyChain of the lucene connector does not support SPARQL path expressions.

Reuse what the inferencer provides, e.g. you could either make the http://ontologies.acme.com/core#locatedInside transitive or if that is unfeasable due to some modelling restriction, make it a subproperty of a transitive property and use that within the properyChain definition of the field instead.

answered Feb 28, 2019 at 7:32

Damyan Ognyanov

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