Extended ODF schema

[Michael Stahl]

On 07.02.23 23:39, Regina Henschel wrote:
> Hi Laurent,
> 
> This is all without warranty, I am not an expert on rng.
> 
> Laurent Balland schrieb am 07.02.2023 um 21:50:
>> Hello,
>>
>> I'm trying to modify 
>> schema/libreoffice/OpenDocument-v1.3+libreoffice-schema.rng to add a 
>> new attribute to number:text
>>
>> I added:
>>
>>    <rng:define name="number-text" combine="interleave">
>>      <rng:ref name="number-text-attlist"/>
>>    </rng:define>
>>
>>    <rng:define name="number-text-attlist">
>>      <rng:interleave>
>>        <rng:optional>
>>          <rng:attribute name="loext:blank-width-char">
>>            <rng:ref name="string"/>
>>          </rng:attribute>
>>        </rng:optional>
>>      </rng:interleave>
>>    </rng:define>
>>
>> But I got the following error: 
>> .../schema/libreoffice/OpenDocument-v1.3+libreoffice-schema.rng[7078,43]: Fatal: <attribute> is grouped and that group is repeated
>>
>> The line number corresponds to nothing, and if I move the upper code 
>> on a different place in the file, the error is always at this unknown 
>> 7078th line. >
>> Any idea about what I could try?
> 
> The line 7078 belongs to <rng:element name="number:date-style">
> That can have several <rng:ref name="number-text-with-fillchar"/>.
> Such is in line 7427. It can have several <rng:ref name="number-text"/>.
> Currently all together resolves to several <rng:element 
> name="number:text"> and  <rng:element name="number:fill-character">. So 
> currently <number:date-style> element can have several child elements 
> <number:text>. That is no problem, because several child elements with 
> the same name are possible.
> 
> Now you introduce an attribute into <rng:ref name="number-text"/>. That 
> means, that when resolving it for <number:date-style> element this would 
> get several attributes with the same name. And that is not possible.
> 
> You need to look, to which element your new attribute belongs.

if it should go on the numer:text element, it needs to be a child of its 
rng:element - currently it's not extensible (via "combine" feature):

   <rng:define name="number-text">
     <rng:element name="number:text">
       <rng:text/>
     </rng:element>
   </rng:define>

so you have to override it - at the start of the libreoffice schema 
there is an rng:include, paste the above into this include element and 
adapt it - this will override what is in the included file.