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From: "Reinhard Poetz" <reinhard@apache.org>
To: <users@cocoon.apache.org>
Subject: RE: Simple parameter substitution not working in sub-sitemap?
Date: Wed, 4 Feb 2004 14:33:54 +0100
Message-ID: <000001c3eb23$88ea3920$1e01a8c0@WRPO>
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In-Reply-To: <bvqrrb$lq7$1@sea.gmane.org>
Importance: Normal


From: news [mailto:news@sea.gmane.org]

> > This had nothing to do with setting parameters but with 
> variables in 
> > @type attributes. AFAIK you can't set the type of a 
> pipeline component 
> > (generators, transformers, serializers) using a variable or 
> an input 
> > module.
> > 
> I see now. But it does make sense to have this functionality IMHO.
> 
> Imagine Tuomo's usecase a bit more extended
> 
> <map:match pattern="*.*">
>    <map:generate src="{1}.{2}"/>
>    <map:transform type="{2}"/>
>    <map:serialize type="{2}"/>
> </map:match>
> 
> Using the old syntax this becomes
> 
> <map:match pattern="*.*">
>     <map:select type="parameter">
>       <map:parameter name="parameter-selector-test" value="{2}"/>
> <!-- for each possible file extension you need to have this block -->
>       <map:when test="svg">
>         <map:generate src="{1}.{2}"/>
>         <map:transform type="svg"/>
>         <map:serialize type="svg"/>
>       </map:when>      	
>       <map:when test="video">
>         <map:generate src="{1}.{2}"/>
>         <map:transform type="video"/>
>         <map:serialize type="video"/>
>       </map:when>
>       ......
>     </map:select>
> </map:match>
> 
> Or is there a better way to translate above usecase to sitemap syntax?

Not that I know.
But also don't forget that you can't set default values. 

If it is important for anyone check the archives for the reasons. I
guess this issue hasn't come up the first time. 
If you don't find anything or you're not satisfied with the explanations
you can ask on dev@ for the reasons why  variable substituion is not
allowed in @type attributes.

Best,
Reinhard


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