question: where is the colon in processing instruction names

John Cowan cowan at
Wed May 19 16:58:44 BST 1999

Arthur Rother wrote:

> The question is, is [colon in PI targets] allowed, and if not, why?
> This is probably discussed allready, but I could not find
> more as the one message mentioned.

Not allowed, because colons are allowed only in element and
attribute names.  There is a note near the end of XML-Namespaces
explaining this.  (Of course they are allowed in vanilla XML 1.0
without namespaces, but they are discouraged, unless you are
experimenting with a namespace mechanism other than XML-Namespaces.)

The mechanism for mapping PI targets to URIs is a notation declaration,
as explained in XML-Rec.

John Cowan		cowan at
	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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