Why not PIs for namespace declarations?
Clark C. Evans
clark.evans at manhattanproject.com
Thu Dec 23 21:32:13 GMT 1999
On Thu, 23 Dec 1999, David Brownell wrote:
> > On Thu, 23 Dec 1999, Andrew Layman wrote:
> > > Clark Evans asks why PIs are not the mechanism for namespace declaration.
> > > That option was extensively debated during the design process (see the
> > > archives for details). The short answer is that PIs do not have tree scope,
> > > so are unsuitable for modular document construction.
> Bad short answer; see below.
Oh ya! Stupid me. Very sorry.
content ::= (element | CharData | Reference | CDSect | PI | Comment)
> What you're suggesting is that PIs be lexically scoped.
> (That's what Andrew seems to mean by "tree" scope.)
> And in fact, there's nothing in the world preventing the
> definition of a particular PI from using lexical scope.
> One doesn't need all PIs to work that way; only one.
> > <parent>
> > <child>
> > <?pi?>
> > <grandchild/>
> > <!-- pi's scope ends here -->
> > </child>
> > </parent>
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