[jira] [Created] (JENA-2005) SPARQL does not correctly handle xsd:decimal datatypes

["Steve Baskauf (Jira)" <ji...@apache.org>]

Steve Baskauf created JENA-2005:
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             Summary: SPARQL does not correctly handle xsd:decimal datatypes
                 Key: JENA-2005
                 URL: https://issues.apache.org/jira/browse/JENA-2005
             Project: Apache Jena
          Issue Type: Bug
          Components: Fuseki
    Affects Versions: Jena 3.16.0
            Reporter: Steve Baskauf


In performing a federated query at the Wikidata Query Service ([https://query.wikidata.org/sparql),] I bound the object of the triple:

 

<http://www.wikidata.org/entity/Q97446840>  <http://www.wikidata.org/prop/direct/P2896>  "4"^^xsd:decimal.

 

as it was provided by the SERVICE endpoint. I also bound the value of the triple:

 

<http://www.wikidata.org/entity/Q97446840>  <http://www.wikidata.org/prop/direct/P2896>  "4.0"^^xsd:decimal.

 

which was present in the local dataset. (The value was originally loaded from Turtle as the number 4.0 (not a datatyped literal).

When I performed a MINUS operation between the bound values from the SERVICE endpoint and the bound values from the local triplestore, this value should have been removed from the result set because according to the XML schema Recommendation [https://www.w3.org/TR/xmlschema-2/#decimal] both "4" and "4.0" are valid lexical representations ("If the fractional part is zero, the period and following zero(es) can be omitted.") of the same decimal number. However, Fuseki did not recognize the two values as identical, which is an error.



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