Re: [xsl] A regular expression for the content of any processing-instruction

[David Carlisle <davidc@xxxxxxxxx>]

On 23/02/2012 14:04, Costello, Roger L. wrote:
> Is it common practice to structure the content of PIs as 
attribute/value pairs?

It wasn't in the old days, XML started a trend I think with pseudo 
attributes in the xml declaration like encoding="utf8" and 
xml-stylesheet carried on the tradition.

In many original uses the PI is used a a hole in to which to drop 
processing instructions in the language used by the processor, so often 
in some completely different non-Tex typesetting language. (In xmltex 
for example you can drop bits of TeX syntax into a PI and they fall 
through into the generated document.

Basically PI's are a distinguished form of comment, just using <? ?> 
instead of <!-- -->.


David

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