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Is there any legitimate case for processing based on a specificnamespace prefix?

Hi Folks,

Recall that a namespace prefix may be anything.

For example, by convention 'xsl' is used as the prefix for the XSLT namespace, but I could equally well use 'foo' or 'bar' as the prefix.

Is there ever a time when it is okay to create an XML application that checks for a specific prefix, e.g.,

    If the prefix is 'foo' then
            do A, B, C
           do X, Y, Z

It seems to me that such code would be very brittle and very unwise.

But perhaps there are legitimate cases where this is okay.

If so, would you provide a concrete example please?


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