Antonio,
At 02:06 PM 1/27/2005, you wrote:
This is waht is called a "identity transform" used when one wants to
transform a tree to another with small changes in it (am i correct?)
Close.
An identity transform works to transform an input tree into a copy of itself.
There are two ways of accomplishing this: by simply copying the whole tree
(xsl:copy-of select="/"), and by traversing the tree one node at a time in
the usual way (<xsl:apply-templates/>), copying it as you go.
The latter version is the more useful one, since it also allows you to
match particular nodes to modify them, instead of simply copying them.
Accordingly it's what is usually meant in the literature as "the identity
transform". An example of such a transform appears by that name in the XSLT
1.0 Recommendation [http://www.w3.org/TR/xslt, section 7.5], and its single
template is sometimes called "the identity template".
Since they're not quite exactly identity transforms themselves, I call
modifications of this useful stylesheet (i.e., that use the identity
template for most nodes, and override it for some) "near-identity
transforms" (so I don't have to say "a modified version of the identity
transform" all the time :-).
Cheers,
Wendell
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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
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