xmlindex getting attributes and more

xmlindex getting attributes and more

[Hans van der Meer]

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(1) How does one retrieve an attribute from an element collected with  
\xmlindex{node{lpath}{n}?

(2) I don't understand in xml:test \xmlcount{#1}{} giving 1 for an  
answer,
whereas \xmlcount{#1}{*} and \xmlcount{#1}{/abc} yield 2 as is expected.

(3) With the code below \xmlindex starts looping on an empty lpath,  
whereas like \xmltext{} react without problem.
Problem is showed by \xmlindex, \xmlfirst, \xmllast, \xmlall, \xmlconcat
Behaviour is not shown by \xmltext{node}{}, \xmlstripped, \xmlstrip
Is this a bug in \xmlindex's underlying lua?

! TeX capacity exceeded, sorry [text input levels=127].
\xmlindex ...ua {lxml.index("#1","#2",\number #3)}
\@@su:xml:test #1->test:\xmlindex {#1}{}{1}
                                            \par
l.7 }
\xmlindex ...ua {lxml.index("#1","#2",\number #3)}
\@@su:xml:test #1->test:\xmlindex {#1}{}{1}
                                            \par

\startxmlsetups xml:testsetups
	\xmlsetsetup{test}{test|abc}{xml:*}
\stopxmlsetups
\xmlregistersetup{xml:testsetups}

\startxmlsetups xml:test
	test:\xmlindex{#1}{}{1}\par % << empty lpath fails
\stopxmlsetups

\startxmlsetups xml:abc
	abc:\xmlflush{#1}\par
\stopxmlsetups

\starttext
\xmlprocessfile{test}{test.xml}{}
\stoptext

<test>
	<abc>ABC-1</abc>
	<abc>ABC-2</abc>
</test>



Hans van der Meer





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Re: xmlindex getting attributes and more

[Hans Hagen]

On 15-3-2010 22:26, Hans van der Meer wrote:
> (1) How does one retrieve an attribute from an element collected with
> \xmlindex{node{lpath}{n}?
>
> (2) I don't understand in xml:test \xmlcount{#1}{} giving 1 for an answer,
> whereas \xmlcount{#1}{*} and \xmlcount{#1}{/abc} yield 2 as is expected.

because {} is not {*} but basically self

> (3) With the code below \xmlindex starts looping on an empty lpath,
> whereas like \xmltext{} react without problem.
> Problem is showed by \xmlindex, \xmlfirst, \xmllast, \xmlall, \xmlconcat
> Behaviour is not shown by \xmltext{node}{}, \xmlstripped, \xmlstrip
> Is this a bug in \xmlindex's underlying lua?
>
> ! TeX capacity exceeded, sorry [text input levels=127].
> \xmlindex ...ua {lxml.index("#1","#2",\number #3)}
> \@@su:xml:test #1->test:\xmlindex {#1}{}{1}
> \par
> l.7 }
> \xmlindex ...ua {lxml.index("#1","#2",\number #3)}
> \@@su:xml:test #1->test:\xmlindex {#1}{}{1}
> \par
>
> \startxmlsetups xml:testsetups
> \xmlsetsetup{test}{test|abc}{xml:*}
> \stopxmlsetups
> \xmlregistersetup{xml:testsetups}
>
> \startxmlsetups xml:test
> test:\xmlindex{#1}{}{1}\par % << empty lpath fails
> \stopxmlsetups

why do you use xmlindex

in this case you could use \xmlfirst{#1}

or

\xmlfilter{#1}{[position()=1]}

(I will probably rewrite xmlindex as it's a leftover)



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___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________