Re: [xsl] copy attributes, except some

Hi Wendell,

True. The thing that still bothers me with this is that since nodes and 
content are compared, a variable like $excepted-attributes has to be 
defined for every attribute group, for every tree/subtree that may get 
copied which is getting to be quite an overhead here.  The situation is 
more or less the same for the attribute() approach. Comparing attribute 
names is really what I require but is trickier in a namespace safe way.
Consequently, by first declaring a variable with a "dummy" set of 
attributes to exclude, like
   <xsl:variable name="dummy-attributes"><xx name1="" name2="" name3="" 
name4=""/></xsl:variable>
I can now declare:
   <xsl:variable name="excepted-attributes" 
select="$dummy-attributes//@*/node-name(.)"/>
and later use:
   <xsl:copy-of select="@*[not(node-name(.) = $excepted-attributes)]"/>
on as many trees as I need, bringing the variable overhead down to two 
per excepted attribute set, independently of the number of tree/subtree 
that need copying, which is a lot in this case.
Also note that the example here copies attributes from the context node 
which implies, especially with many trees/subtrees and many excluded 
attributes that you would want to use a lot of <xsl:for-each 
select="$this-tree-or-subtree"> elements to set those context nodes.  
With an attribute name-based approach one can also spare most of these 
context setting instructions, just simply using the tree variable 
reference once, per tree. Again, it seems, quite a saving in a setting 
with many trees/subtrees.
The solution still does not seem perfectly elegant, especially as it is 
a little twisted, but it seems like the best possible, and it works.
Mind you, in a context where elements can have dynamic attribute sets 
from a wide potential range, from multiple namespaces, which I think 
should be casual with XML, it may be interesting to consider how this 
could be made more elegant.
It works for now and I thank you, and everyone who contributed, for the 
insight.
Cheers,
ac


> ac,
>
> At 02:37 AM 10/29/2009, you wrote:
> > Hi,
> >
> > Sorry for noise again, but David did provide a possibly better option 
> > as in:
> > <xsl:copy-of select="@* except (attribute(name1), attribute(name2), 
> > attribute(name3), attribute(name4))"/>
> Also (syntax errors aside), if you wanted to drive this from the top:
>
> <xsl:variable name="excepted-attributes" select="//@name1 | //@name2 | 
> //@name3"/>
> ... and then ...
>
> <xsl:copy-of select="@* except $excepted-attributes"/>
>
> Cheers,
> Wendell
>
>
> ======================================================================
> Wendell Piez                            
> mailto:wapiez(_at_)mulberrytech(_dot_)com
> Mulberry Technologies, Inc.                http://www.mulberrytech.com
> 17 West Jefferson Street                    Direct Phone: 301/315-9635
> Suite 207                                          Phone: 301/315-9631
> Rockville, MD  20850                                 Fax: 301/315-8285
> ----------------------------------------------------------------------
>   Mulberry Technologies: A Consultancy Specializing in SGML and XML
> ======================================================================
>
>
> --~------------------------------------------------------------------
> XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list
> To unsubscribe, go to: http://lists.mulberrytech.com/xsl-list/
> or e-mail: <mailto:xsl-list-unsubscribe(_at_)lists(_dot_)mulberrytech(_dot_)com>
> --~--
--~------------------------------------------------------------------
XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list
To unsubscribe, go to: http://lists.mulberrytech.com/xsl-list/
or e-mail: <mailto:xsl-list-unsubscribe(_at_)lists(_dot_)mulberrytech(_dot_)com>
--~--