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From: Hans Hagen <pragma@wxs.nl>
Newsgroups: gmane.comp.tex.context
Subject: Re: Re: Re: ConTeXt, XML, multiple attributes evaluation
Date: Wed, 30 Nov 2005 09:36:25 +0100
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Johannes Graumann wrote:

>Hans,
>
>I'm just not getting it ... can't find the appropriate documentation maybe?
>http://www.pragma-ade.nl/general/manuals/example.pdf is all I got and e.g.
>"XMLop" does not show up at all in there ...
>  
>
XMLop{xx} is a shortcut for \XMLpar{list}{xx}{some default}

and as long as the current element is list that will work, so

\defineXMLenvironment[list]
  {here \XMLop{xx} works fine}
  {but here the last element encountered may be another than list}

>I tryed to get this working (just trial and error), but I just don't
>understand ... can you kick me some more into the right direction?
>
>\mapXMLvalue {list:packed} {yes} {packed}
>\mapXMLvalue {list:packed} {no} {unpacked}
>\mapXMLvalue {list:setup}  {\XMLpar{list}{setup}{}} {setup}
>\defineXMLenvironment
>        [list]
>        [packed=no,setup=1]
>        {%
>                \startitemize[%
>                        \XMLval{list:setup}{\XMLop{setup}}{},
>                        \XMLval{list:packed}{\XMLop{packed}}{}
>                ]%
>        }%
>        {\stopitemize}
>
>Likly many a thing doesn't make sense at all - I just don't get it.
>
>Any hint is highly appreciated,
>  
>
This works ok here:

\mapXMLvalue {list:packed} {yes} {packed}
\mapXMLvalue {list:packed} {no} {unpacked}

\defineXMLenvironment
    [list]
    [packed=no,setup=1]
    {\startitemize[\XMLop{setup},\XMLval{list:packed}{\XMLop{packed}}{}]}
    {\stopitemize}

\defineXMLenvironment
    [item]
    {\item}
    {\endgraf}

\starttext

\startXMLdata
<list packed='yes'>
    <item>item one</item>
    <item>item two</item>
</list>
\stopXMLdata

\startXMLdata
<list>
    <item>item one</item>
    <item>item two</item>
</list>
\stopXMLdata

\startXMLdata
<list packed='yes' setup='a'>
    <item>item one</item>
    <item>item two</item>
</list>
\stopXMLdata

\startXMLdata
<list setup='a'>
    <item>item one</item>
    <item>item two</item>
</list>
\stopXMLdata

\stoptext

(it may help to look at the x-* files in the context/base path)

Hans