[jira] [Resolved] (JENA-1679) Effective boolean value for "NaN"^^xsd:float/xsd:double should be false

["Andy Seaborne (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/JENA-1679?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andy Seaborne resolved JENA-1679.
---------------------------------
    Resolution: Fixed

> Effective boolean value for "NaN"^^xsd:float/xsd:double should be false
> -----------------------------------------------------------------------
>
>                 Key: JENA-1679
>                 URL: https://issues.apache.org/jira/browse/JENA-1679
>             Project: Apache Jena
>          Issue Type: Bug
>          Components: ARQ
>    Affects Versions: Jena 3.10.0
>         Environment: Tested on Jena 3.9
>            Reporter: Richard Cyganiak
>            Assignee: Andy Seaborne
>            Priority: Major
>             Fix For: Jena 3.11.0
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> SPARQL 1.1 defines the [effective boolean value|https://www.w3.org/TR/sparql11-query/#ebv
> ] (EBV) of the special numeric value NaN as follows:
> {quote}
> If the argument is a numeric type or a typed literal with a datatype derived from a numeric type, and it has a valid lexical form, the EBV is false if the operand value is NaN or is numerically equal to zero; otherwise the EBV is true.
> {quote}
> Jena however treats it as {{true}}. The following queries both return {{true}} but should return {{false}} (using {{!(!expr))}} to get the EBV):
> {noformat}
> SELECT (!(!"NaN"^^<http://www.w3.org/2001/XMLSchema#double>) AS ?x) WHERE {}
> SELECT (!(!"NaN"^^<http://www.w3.org/2001/XMLSchema#float>) AS ?x) WHERE {}
> {noformat}



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