[jira] [Resolved] (JENA-1071) Warnings when using XML 1.0 5th edition codepoints in rdf:ID.

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

     [ https://issues.apache.org/jira/browse/JENA-1071?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andy Seaborne resolved JENA-1071.
---------------------------------
       Resolution: Fixed
         Assignee: Andy Seaborne
    Fix Version/s: Jena 3.1.0

Only {{rdf:ID}} parsing changed.

> Warnings when using XML 1.0 5th edition codepoints in rdf:ID.
> -------------------------------------------------------------
>
>                 Key: JENA-1071
>                 URL: https://issues.apache.org/jira/browse/JENA-1071
>             Project: Apache Jena
>          Issue Type: Bug
>            Reporter: Andy Seaborne
>            Assignee: Andy Seaborne
>            Priority: Minor
>             Fix For: Jena 3.1.0
>
>
> Report on users@ https://pony-poc.apache.org/thread.html/Znx1topkrk8ykbr 
> Workaround: 
> * Use {{rdf:about}}
> * Ignore or disable the warning
> The causing character is [Character U+0370|http://www.fileformat.info/info/unicode/char/0370/index.htm] (Greek Capital Heta). It was added to unicode at version 5.1. https://en.wikipedia.org/wiki/Heta
> Greek letters e.g.  ΑΒ..., (Capital Letters alpha and beta) U+0391 and αβ...  (lower case).
> Jena code {{ParserSupport.checkXMLName}} calls Xerces {{XMLChar.isValidNCName}}.
> Xerces supports "XML 1.0 Fourth Edition" which does not permit U+0370.
> Java8 also only supports XML 1.0 fourth edition.
> Both Xerces 2.11.0 (Jena since 2.10.1) and Java8 support XML 1.1 with {{XML11Char.isXML11ValidNCName}} which does include this character.
> Jena could "upgrade" to using the XML11Char for the additional checks it performs.  This is not XML11 support.
> Uses of {{XMLChar}}:
> * {{BaseXMLWriter.java}}
> * {{ParserSupport.java}}
> * {{Unparser.java}}
> * {{PrefixMappingImpl}} -- URI splitting?
> * {{Util}} - controls URI splitting
> * {{schemagen}}



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