On Feb 21, 2011, at 11:37 PM, Hans Hagen wrote:
> On 21-2-2011 8:11, Thomas Schmitz wrote:
>> Hi all,
>>
>> this must be easy, but I don't find the solution. Given an xml structure
>> like this:
>>
>> <X>
>> <A>dog</A>
>> <A><B>cat</B></A>
>> <A><B>mouse</B></A>
>> </X>
>>
>> which \xmlfilter expression do I need to get the first <A> element which
>> has a subelement <B>? I.e., the filter should only return "cat," not
>> "dog" or "mouse." There can be 0 or more elements without <B> before and
>> after the one I want to retrieve.
>>
>> Sorry if this is elementary, but I looked at xml-mkiv.pdf and mk.pdf and
>> couldn't find an answer.
>
> "A/B[1]"
>
Sorry, I guess I wasn't clear enough. Here's a fuller example:
\startbuffer[test]
<A>
<B>cat</B>
<B><C>dog</C></B>
<B><C>mouse</C></B>
<B><C>donkey</C></B>
<B>giraffe</B>
</A>
\stopbuffer
\startxmlsetups xml:testsetups
\xmlsetsetup{\xmldocument}{A|B|C}{xml:*}
\stopxmlsetups
\xmlregistersetup{xml:testsetups}
\startxmlsetups xml:A
\xmlflush{#1}
\stopxmlsetups
\startxmlsetups xml:B
\xmlfilter{#1}{/C[1]/command(xml:C:first)}
\stopxmlsetups
\startxmlsetups xml:C:first
\color[red]{\xmlflush{#1}}
\stopxmlsetups
\startxmlsetups xml:C
\xmlflush{#1}
\stopxmlsetups
\starttext
\xmlprocessbuffer{main}{test}{}
\stoptext
Suppose I want the first <A><B> subelement in red, all the other <A><B>
subelements in blue? Right now, I get all the B's in red.
Thanks, as always
Thomas
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