Re: [xml] regular expressions - bug or feature?

[Daniel Veillard <veillard redhat com>]

On Mon, Apr 19, 2004 at 11:21:22AM +0200, Petr Novak wrote:
> Hallo,
> I have one question about regular expressions in RELAX NG schema. I have the 
> follow schema:
>
> <?xml version="1.0" encoding="utf-8"?>
> <grammar xmlns="http://relaxng.org/ns/structure/1.0";
>          datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes";>
>   <start>
>     <element>
>       <name ns="">test</name>
>       <data type="string">
>         <param name="pattern">test(A{0,4})</param>
>       </data>
>     </element>
>   </start>
> </grammar>
>
> So, it would mean that tag 'test' must contain zero or at most four caracters
> 'A'. Bud libxml2 interprets it as a already one incidence. I tested it with
> the follow document:
>
> <?xml version="1.0" encoding="utf-8"?>
> <test xmlns="">test</test> 
>
> Bud xmllint return me:
>
> data_test0.xml:2: element test: Relax-NG validity error : Error validating datatype string
> data_test0.xml:2: element test: Relax-NG validity error : Element test failed to validate content
> data_test0.xml fails to validate
>
> Only if I change test element content to some as a 'A', 'testA'... it works.
> If there is no 0 in the regular expression, it works fine to (e.g., A{1,5}...).
>
> Is this some feature of the regular expression in the RELAX NG or it is the
> bug? I tested it by xmllint from libxml2 2.6.8

  Looks like a bug, can you bugzilla it please ?

   thanks,

Daniel

-- 
Daniel Veillard      | Red Hat Desktop team http://redhat.com/
veillard redhat com  | libxml GNOME XML XSLT toolkit  http://xmlsoft.org/
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