Re: [xml] xmllint -valid versus -postvalid

[Daniel Veillard <veillard redhat com>]

On Wed, Dec 08, 2004 at 10:53:32AM -0800, Bob Stayton wrote:
> I have an XML file that uses SYSTEM entities, and it validates when I use
> "xmllint -valid" but that fails validation when I use "xmllint -postvalid".
> I get:
>
> validity error : IDREF attribute linkend references an unknown ID "foo"
>
> The ID being referenced is in a SYSTEM entity that is pulled into the file
> with an entity reference, and the IDREF is in the main file.  If I manually
> resolve all of the entities, then indeed the file is valid with both -valid
> and -postvalid.
>
> So what is the difference between -valid and -postvalid when no XIncludes

  -valid     implements the DTD validation as defined by the XML spec.
  -postvalid run the validation code on an existing tree. If the existing tree
             does not have all the bits needed for the validation you will get
             failures

  only -valid is claimed to be conformant to the XML spec. -postvalid 
may be used if you know the limitations. For example -postvalid may not try to
fetch external parsed entities, because those are fetched at parsing
time and only if required.

Daniel

-- 
Daniel Veillard      | Red Hat Desktop team http://redhat.com/
veillard redhat com  | libxml GNOME XML XSLT toolkit  http://xmlsoft.org/
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