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Posted to dev@jena.apache.org by "Andy Seaborne (JIRA)" <ji...@apache.org> on 2019/03/13 09:17:00 UTC
[jira] [Updated] (JENA-1679) Effective boolean value for
"NaN"^^xsd:float/xsd:double should be false
[ https://issues.apache.org/jira/browse/JENA-1679?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Andy Seaborne updated JENA-1679:
--------------------------------
Affects Version/s: Jena 3.10.0
Fix Version/s: Jena 3.11.0
> 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
> 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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