Processing instructions (was XSchema: Sections 5.0 and 5.1)
cowan at locke.ccil.org
Fri Sep 25 17:10:54 BST 1998
Michael Kay scripsit:
> I'm designing a document type. Is there any circumstance
> when you would advise me to use a Processing Instruction
> rather than an empty element with attributes? I can't think
> of one myself, but I'm sure the XML designers must have had
> something in mind.
PIs are extremely useful when adding information to documents with
frozen DTDs. For example, the proposed "xml:stylesheet" PI allows you
to attach a stylesheet to any XML document without having to
tamper with the document's DTD (as by adding a STYLE element
I can't see designing a new document type and using PIs, though.
As you say, elements or attributes do the work.
John Cowan http://www.ccil.org/~cowan cowan at ccil.org
You tollerday donsk? N. You tolkatiff scowegian? Nn.
You spigotty anglease? Nnn. You phonio saxo? Nnnn.
Clear all so! 'Tis a Jute.... (Finnegans Wake 16.5)
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