PITarget uniqueness

Peter Stark stark at uplanet.com
Sat Apr 17 20:48:19 BST 1999


> -----Original Message-----
> From: owner-xml-dev at ic.ac.uk [mailto:owner-xml-dev at ic.ac.uk]On Behalf Of
> John Cowan
> Sent: Friday, April 09, 1999 12:32 PM
> To: XML Dev
> Subject: Re: PITarget uniqueness
>
>
> James Tauber wrote:
> > PI targets can be associated with a URI using the NOTATION
> mechanism. This
> > is so much like the namespace mechanism that I'd really like it
> if the two
> > were merged and the PI target made arbitrary.
>
> I have a new SAX parser filter in the planning stages called PIEngine.
> It will take three actions w.r.t. PIs, selectable by mode switches:
>
> 	notation resolution: replace any PI target with the URI
> 	declared in the corresponding notation declaration, provided
> 	there is one.
>
> 	character references: convert numeric character references
> 	in PI data to the corresponding characters
>
> 	pseudo-elements: decode PIs as if they contained attributes
> 	(a bare name is interpreted as name="name", as in SGML)
> 	and pass them as empty elements with "?" prefixed to the name.

Interesting.

Shouldn't the pseudo-element have an end-tag, so that both the start and the
end of the data to which the PI applies, can be marked? For example, in the
eXtensible Protocol, the 'xp'-pseudo-element has :

<?xp >
...
<?xp / ?>

I believe this can be useful for other PI elements as well.

Peter


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