Templates not working without TermType

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
65/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Quiet
Tech stack
java
Domain
data

Research direction

Start by reproducing the minimal JSONPath and RML mapping example from the issue, then locate the code that handles rml:template values when rml:termType is absent. Done means the typeless template produces the expected canonical RDF/XSD value instead of omitting the triple, while the explicitly literal case remains unchanged.

Written by the indexing model from the issue text.

Description

When using rml:template to construct an expression value without a corresponding rml:termType, the triples in question are missing from the output, except when they result in a well-formed HTTP URI. According to the RML spec however, any resulting string (not NULL) needs to be mapped to its canonical RDF/XSD form.

Minimal example:

:mapping a rml:TriplesMap ;
  rml:logicalSource [
    # JSONPath root iterator over { "key": "value" }
  ] ;
  rml:subjectMap [ rml:termType rml:BlankNode ] ;
  rml:predicateObjectMap [
    rml:predicate <urn:example:typeless> ;
    rml:objectMap [ rml:template "key" ] ;
  ], [
    rml:predicate <urn:example:typed> ;
    rml:objectMap [ 
      rml:termType rml:Literal ;
      rml:template "key" 
    ] ;
  ] .

Output:

_:Blank1 <urn:example:typed> "key" .
Dominant language
Java
Stars
3
Forks
1
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