Re: [docbook-apps] Modularization technique

["Bob Foster" <bob@objfac.com>]

From: "Daniel Veillard" <veillard@redhat.com>
> On Mon, Aug 11, 2003 at 06:01:43PM -0700, Bob Stayton wrote:
> > On Mon, Aug 11, 2003 at 07:38:01PM -0500, Bob Foster wrote:
> > > Seems like a more appropriate solution would be to use a validator
that
> > > allows the DTD to be specified outside the document. (And an editor
that
> > > allows same.)
> >
> > Yes, xmllint (included with libxml2) can validate a system entity
> > with an external DTD reference:
>
>   Just be careful that this operation isn't formally defined from
> a standard point of view.

Good point, this had momentarily slipped my mind.

In defense of the approach, if I were running a department where documents
had to be valid before being checked in, I would prefer that they were valid
against a known DTD. The fact that there is no standard way to override a
user's DOCTYPE declaration and as a consequence no way to guarantee that a
document is valid against its (real) definition is often cited as a bug in
XML. Thus we have seen an evolution in "schema" standards, so that a schema
identifier is optional in a document validated against an XML Schema and
cannot be specified at all in a document validated against a RELAX NG
schema.

Nevertheless, you are right about the standard, and that the technique
doesn't allow the use of an internal subset in the "sub-documents".

Bob Foster