Richard Cyganiak created JENA-1679:
--------------------------------------
Summary: 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
Environment: Tested on Jena 3.9
Reporter: Richard Cyganiak
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}
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
