Re: [xsl] checking if an attribute exists

[Oskar Werewka <ow5@xxxxxxxxxxxxxx>]

Thank you. It is working now.

> > This i very simple question:
> >
> > <element attribute="...">Value</element>
> >
> > How can I check if the "attribute" attribute is defined?
>
> I'll use the following as an example because it will be easier to discuss
> (i.e. I won't have to talk about the element element or the attribute
> attribute):
>
> <car color="...">Value</car>
>
> If you want to know whether a given car element has a color attribute set,
> then <xsl:if test="@color"></xsl:if> in a template rule for car will check
> for this.

I was fighting test="@color" for one hour, but I was in a wrong node ;->


> If, on the other hand, by "defined" you mean that you want to check whether
> color was declared as an attribute for the car element, you can't, because
> attribute list declarations happen in the DTD, and an XSLT processor has no
> way of knowing what's in the DTD.
>
> The input to an XSLT processor is an in-memory representation of a document
> known as a source tree that was constructed with the help of an XML parser.
> This parser may have looked at the DTD, but once the source tree is created,
> the parser's job is done, and the XSLT processor has no way of knowing what
> effect a DTD may have had on the tree's construction.
>
> Bob DuCharme            www.snee.com/bob             <bob@
> snee.com>      see http://www.snee.com/bob/xsltquickly for
> info on new book "XSLT Quickly" from Manning Publications.
>
>
>
>  XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list



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