Re: ConTeXt, XML, multiple attributes evaluation

[Richard Gabriel <rgabriel@kerio.com>]

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Thanks, Hans! One's still learning...
  
  R.
  
  _____  

From: Hans Hagen [mailto:pragma@wxs.nl]
To: mailing list for ConTeXt users [mailto:ntg-context@ntg.nl]
Cc: graumann@its.caltech.edu
Sent: Tue, 29 Nov 2005 10:52:14 +0100
Subject: Re: [NTG-context] ConTeXt, XML, multiple attributes evaluation

Richard Gabriel wrote:

> Hello Johannes,
>
> I consider your first \XMLifequalelse command a bit strange. This 
> command is intented to be used if you want to convert the attribute 
> values into something else (e.g. "yes" into "packed").
> If you need the unmodified parameter value, simply use \XMLpar.
> So e.g.:
>
> \startitemize[ \XMLpar{list}{setup}{}, 
> \XMLifequalelse{list}{packed}{yes}{packed}{unpacked} ]
>
> Of course "setup" should be a required attribute of <list> (in your 
> DTD), otherwise it would lead to something like \startitemize[,packed] 
> which obviously wouldn't work at all.
> If it's not the case, I'd use \doifXMLparelse:
>
> \doifXMLparelse{list}{setup}{%
>   \startitemize[ \XMLpar{list}{setup}{}, 
> \XMLifequalelse{list}{packed}{yes}{packed}{unpacked} ]%
> }{%
>   \startitemize[1, \XMLifequalelse{list}{packed}{yes}{packed}{unpacked} ]
> }
>
>
> -Richard
>
>
>     ------------------------------------------------------------------------
>     *From:* Johannes Graumann [mailto:graumann@caltech.edu]
>     *To:* ntg-context@ntg.nl
>     *Sent:* Tue, 29 Nov 2005 05:30:25 +0100
>     *Subject:* [NTG-context] ConTeXt, XML, multiple attributes evaluation
>
>     Hello again,
>
>     Another one:
>     I'm trying to expand
>     >\defineXMLenvironment [list]%
>     > {%
>     > \expanded{%
>     > \startitemize%
>     > [%
>     > \XMLifequalelse{list}{packed}{yes}{packed}{unpacked}%
>     > ]%
>     > }%
>     > }%
>     > {\stopitemize}
>
>     which can deal with things like
>     ><list packed="yes">
>     > <item>
>     > </item>
>     ></list>
>
>     To something able to deal with multiple attributes (a "setup"
>     statement for
>     now):
>     ><list packed="yes" setup="n">
>     > <item>
>     > </item>
>     ></list>
>
>     I have tryed multiple incarnations of
>     >\defineXMLenvironment [list]%
>     > {%
>     > \expanded{%
>     > \startitemize%
>     > [%
>     > \XMLifequalelse{list}{setup}{n}{n}{},%
>     > \XMLifequalelse{list}{packed}{yes}{packed}{unpacked}%
>     > ]%
>     > }%
>     > }%
>     > {\stopitemize}
>
>     but this doesn't work ...
>
>     Can anybody give me any pointers here?
>

a convenient way is to use the remapper:

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

and then:

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

no fuzzy testing involved, just expansion (fast and clean)

Hans
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