Hmm. I think it should only be an exception when
validating. I can't imagine why the user of a non-
validating processor would care if an external reference
existed or not but maybe the parser should have some sort
of warning flag that could be checked after a parse to
signal that situation.
-----Original Message-----
From: Peter A. Volchek [mailto:[EMAIL PROTECTED]]
Sent: Thursday, April 26, 2001 10:10 AM
To: [EMAIL PROTECTED]
Subject: Re: PLEASE HELP: SAX parser errors on validation when
ValScheme=Val_Never?????
Absolutely agree
>but it MUST NOT be an error if the file is
>not found since a non-validating processor is NOT required
>to read the external sub-set.
Lets say, it must not be a critical error, in other words, one should be
able to catch exception and continue parsing.
Sometimes it is desirable to know that dtd is missing.
----- Original Message -----
From: Bil Mason
To: [EMAIL PROTECTED]
Sent: Thursday, April 26, 2001 5:00 PM
Subject: RE: PLEASE HELP: SAX parser errors on validation when
ValScheme=Val_Never?????
Actually, I don't think it's quite that simple. A non-
validating parser is NOT required to read the external
subset at all. Unfortunately, the 1.0 spec. doesn't say it
MUST not, only that "Non-validating processors are required
to check only the document entity, including the entire
internal DTD subset, for well-formedness." (REC-xml-20001006
5.1, para. 4) The problem seems to be that processors are
allowed to read external declarations, but they can NOT use
them to modify the internal sub-set.
At any rate, Chris said "... when I parse an xml doc that
specifies a dtd ...". It sounds to me like he might have
meant he has a document that has a line like this:
<!DOCTYPE foo SYSTEM "foo.dtd">
A non-validating processor is apparently allowed to attempt
to read foo.dtd, but it MUST NOT be an error if the file is
not found since a non-validating processor is NOT required
to read the external sub-set.
-----Original Message-----
From: Erik Rydgren [mailto:[EMAIL PROTECTED]]
Sent: Thursday, April 26, 2001 7:07 AM
To: [EMAIL PROTECTED]
Subject: RE: PLEASE HELP: SAX parser errors on validation when
ValScheme=Val_Never?????
Yes that is the correct behaviour.
The DTD can contain definitions that are needed even when not validating.
/ Erik Rydgren
-----Original Message-----
From: Prior, Chris [mailto:[EMAIL PROTECTED]]
Sent: den 26 april 2001 13:00
To: '[EMAIL PROTECTED]'
Subject: PLEASE HELP: SAX parser errors on validation when
ValScheme=Val_Never?????
Hi all,
I am using the SAX parser and setting validation to Val_Never, yet when I
parse an xml doc that specifies a dtd the parser fails if it cannot find the
dtd!!!
Why is this the case when I am not interested in validating? Surely looking
for the dtd when no validation is required is not correct?
Please help!
Chris
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