[jira] [Closed] (JENA-1377) Model.isIsomorphicWith() returns false when language tags case do not match

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

     [ https://issues.apache.org/jira/browse/JENA-1377?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andy Seaborne closed JENA-1377.
-------------------------------

> Model.isIsomorphicWith() returns false when language tags case do not match
> ---------------------------------------------------------------------------
>
>                 Key: JENA-1377
>                 URL: https://issues.apache.org/jira/browse/JENA-1377
>             Project: Apache Jena
>          Issue Type: Wish
>          Components: ARQ, Core
>    Affects Versions: Jena 3.3.0
>         Environment: Linux
>            Reporter: Elie Roux
>            Priority: Minor
>
> Model.isIsomorphicWith() treats language tags in a case-sensitive way, which is against BCP47 spec. It is easily shown with an example:
> {noformat}
>            Model m1 = ModelFactory.createDefaultModel();
>            Resource r = m1.getResource("http://example.com/resource");
>            Property p = m1.getProperty("http://example.com/property");
>            m1.add(r, p, m1.createLiteral("example", "zh-Latn-pinyin")); // canonical
>            Model m2 = ModelFactory.createDefaultModel();
>            r = m2.getResource("http://example.com/resource");
>            p = m2.getProperty("http://example.com/property");
>            m2.add(r, p, m1.createLiteral("example", "zh-latn-pinyin")); // lower case
>            System.out.println(m1.isIsomorphicWith(m2));
> {noformat}
> prints false, while it clearly should print true. Related bug (which is not really a bug per se, just a trigger for this one: https://github.com/jsonld-java/jsonld-java/issues/199
> See also https://issues.apache.org/jira/browse/COMMONSRDF-51 for some consideration of the language tag case.



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