Re: [xml] Entities defined using other entities

[christophe barbe <cbarbe obj-sys com>]

In case somebody else has the same problem,
xmlSubstituteEntitiesDefault() was not helpful but setting
XML_PARSE_NOENT in the third argument of xmlReadFile() did the job.

Thanks,
Christophe

On Wed, 2006-11-22 at 14:29 -0500, christophe barbe wrote:
> xmllint with the -noent option does the right thing.
> Thanks for the help,
> Christophe 
> 
> On Wed, 2006-11-22 at 14:15 -0500, christophe barbe wrote:
> > Thanks Daniel for your answer.
> > 
> > For example if I want to parse:
> > 
> > <?xml version="1.0"?>
> > <!DOCTYPE EXAMPLE SYSTEM "example.dtd" [
> > <!ENTITY xml "Extensible Markup Language">
> > <!ENTITY xml2 "Extensible &xml; Markup Language">
> > ]>
> > <EXAMPLE attr="()&xml;()" attr2="()&xml2;()">
> >    &xml;
> > </EXAMPLE>
> > 
> > xmllint gives me the ouput below. There I can see the 2 entity
> > declarations. I would expect there the definition of xml2 to refer to
> > the first entity. 
> > In my program I tried to set xmlSubstituteEntitiesDefault to 1, but it
> > does not seem to have any effect. And my output looks like:
> > 	<EXAMPLE 
> > 		attr="()Extensible Markup Language;()"
> >  		attr2="()Extensible &xml; Markup Language()">
> >    			Extensible Markup Language
> > 	</EXAMPLE>
> > 
> > $ xmllint --debug test.xml
> >  DOCUMENT
> > version=1.0
> > URL=test.xml
> > standalone=true
> >   DTD(EXAMPLE), SYSTEM example.dtd
> >     ENTITYDECL(xml), internal
> >      content=Extensible Markup Language
> >       TEXT
> >         content=Extensible Markup Language
> >     ENTITYDECL(xml2), internal
> >      content=Extensible &xml; Markup Language
> >       TEXT
> >         content=Extensible
> >       ENTITY_REF(xml)
> >         INTERNAL_GENERAL_ENTITY xml
> >         content=Extensible Markup Language
> >       TEXT
> >         content= Markup Language
> >   ELEMENT EXAMPLE
> >     ATTRIBUTE attr
> >       TEXT
> >         content=()
> >       ENTITY_REF(xml)
> >         INTERNAL_GENERAL_ENTITY xml
> >         content=Extensible Markup Language
> >       TEXT
> >         content=()
> >     ATTRIBUTE attr2
> >       TEXT
> >         content=()
> >       ENTITY_REF(xml2)
> >         INTERNAL_GENERAL_ENTITY xml2
> >         content=Extensible &xml; Markup Language
> >       TEXT
> >         content=()
> >     TEXT compact
> >       content=
> >     ENTITY_REF(xml)
> >       INTERNAL_GENERAL_ENTITY xml
> >       content=Extensible Markup Language
> >     TEXT compact
> >       content=
> > 
> > 
> > 
> > On Wed, 2006-11-22 at 14:04 -0500, Daniel Veillard wrote:
> > > On Wed, Nov 22, 2006 at 12:55:27PM -0500, christophe barbe wrote:
> > > > Hi All,
> > > > 
> > > > I am trying to parse a document with entities using libxml2:
> > > > 
> > > > <?xml version="1.0" encoding="UTF-8"?>
> > > >    <!DOCTYPE schema [
> > > >     <!ENTITY ent1 "abc">
> > > >     <!ENTITY ent2  "&ent1;def">
> > > > ...
> > > > 
> > > > It looks like libxml does not handle the fact that one entity is defined
> > > > in term of another.
> > > > 
> > > > Is it a legal use of entities?
> > > 
> > >   yes
> > > 
> > > > Am I correct in assuming that libxml can not handle this use of
> > > > entities?
> > > 
> > >   no
> > >   
> > > > I am not sure if the internal tree could handle it properly.
> > > 
> > >   I am sure it should be able to handle this properly
> > > 
> > > > The original XML file is a schema included in the following IETF draft:
> > > > 
> > > > http://www.ietf.org/internet-drafts/draft-ietf-simple-xml-patch-ops-02.txt
> > > > 
> > > > The entities are used, as macros, to define the regular expression for
> > > > xpath expressions.
> > > 
> > >   No idea what your problem is. If you have a problem reproduceable with
> > > xmllint please provide them as attachment and describe the problem.
> > > 
> > > Daniel
> > > 
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-- 
Christophe Barbe - Software Engineer
Objective Systems, Inc.
REAL WORLD ASN.1 AND XML SOLUTIONS
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