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- From: John Cowan <cowan@locke.ccil.org>
- To: XML Dev <xml-dev@ic.ac.uk>
- Date: Tue, 11 May 1999 14:25:03 -0400
roddey@us.ibm.com wrote:
> That's what got me confused in the first place. My original implementation was
> just to ignore ampersands in the original scan of the entity value.
Be sure to greedily expand character references, though; the ability
to define "lt" and the like depends on that ability.
> But, if raw
> ampersands are not allowed, then I'm just asking whether I'm obligated to prove
> that any ampersand is at least provisionally part of a general entity (even if
> it later turns out not to be a legal one) during the scan of the entity value.
BNF rule 9 says that EntityValues can't contain random & except
as part of a well-formed PEReference or Reference, so it's a WF
error (which you must catch) to have them, even if the entity is
never referenced.
All you actually have to do is to ensure that the next character
(if not #, see above) is a NAMESTRT character, and that all characters
until ; are either NAME or NAMESTRT characters. There is no need (and
in fact it is forbidden) to look up the supposed entity name anywhere.
--
John Cowan http://www.ccil.org/~cowan cowan@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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