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http://issues.apache.org/jira/browse/MYFACES-787?page=comments#action_12360155 
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Simon Kitching commented on MYFACES-787:
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No-one seems to object to this proposal. Therefore, unless there is some 
negative feedback here over the next 24 hours, I will implement this by 
creating a "tomahawk-entities" directory, and moving all attribute definitions 
currently in-line in the tomahawk.tld file into files in this new directory.

> defining attributes in tomahawk.tld makes it difficult to subclass tomahawk 
> components
> --------------------------------------------------------------------------------------
>
>          Key: MYFACES-787
>          URL: http://issues.apache.org/jira/browse/MYFACES-787
>      Project: MyFaces
>         Type: Improvement
>     Reporter: Simon Kitching
>  Attachments: html_column_attributes.xml, tomahawk.tld.patch
>
> The tomahawk.tld file uses xml entities to reference some attributes shared 
> between components.
> However the attributes for tomahawk components are defined in-line in the 
> tomahawk.tld file.
> When subclassing a tomahawk component to extend it, all of the text needs to 
> be copied into the tld
> where the derived component is defined - ugly, esp. for things like 
> HtmlColumn that have dozens of
> attributes.
> Attached is a patch to simply move the attributes defined in tomahawk.tld for 
> the HtmlColumn tag
> into an external entity file, thus allowing derived classes to just reference 
> this entity file.
> I'm happy to provide patches to move all defined attributes for other 
> tomahawk components into
> entity files too, though it probably takes more time to apply/commit such 
> patches than it would for
> a MyFaces committer to make this change directly.
> One possible variant on this patch is to move the other entity refs which are 
> used by HtmlColumn
> into the html_column_attributes.xml file, so that the HtmlColumn definition 
> in tomahawk.tld just
> contains one reference. That makes subclassing even easier, and seems 
> sensible. It's a slightly
> more adventurous change, though, so I've submitted the simpler approach as 
> the patch.

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