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Re: [xml-dev] RELAX NG equivalent of <xsd:any processContents="lax">?

I'm not a RELAX NG expert, but I am interested in this question, so maybe 
your or other experts can provide a bit more detail.  What I see at 
http://relaxng.org/tutorial-20011203.html#IDAFLZR gives some of what I 
think people look for in W3C Schema lax validation, but not quite all of 
it.  The difference I think I see is in the case where the attribute that 
does have a declaration (xml:space in the example at the link) gets its 
declaration from a separate schema document (in W3C Schema terms), perhaps 
for a different targetNamespace.  The RELAX NG solution shown seems to 
require that a list of the elements to be validated be provided with the 
<anyName> wildcard in an <except> element.

Consider a SOAP envelope:


There are a variety of ways to acheive different effects using W3C XML 
Schema, but the schema that's officially published by W3C for the envelope 
has the body marked <any processContents="lax"/>. If someone comes along 
and writes a completely separate schema document describing the 
po:purchaseOrder, and passes both schema documents in on the API call to 
the validator, the envelope and the purchaseOrder will be validated 
together, and the overall envelope will be marked invalid if either the 
envelope markup or the purchaseOrder is in error.  As I understand the 
solution proposed above, it would involve modifying the W3C-provided 
envelope schema to list <po:purchaseOrder> in an <except>.

Does RELAX NG have another approach, or is this considered a non-goal? 
Certainly one always has the option of validating the container and the 
payload separately.   Thanks!


Noah Mendelsohn 
IBM Corporation
One Rogers Street
Cambridge, MA 02142

"Radu Cernuta" <radu.cernuta@gmail.com>
02/06/2007 06:49 AM
        To:     "Jeff Lowery" <jlowery@myrio.com>
        cc:     xml-dev@lists.xml.org, (bcc: Noah 
        Subject:        Re: [xml-dev] RELAX NG equivalent of <xsd:any 

For lax validation in RELAX NG you could take a look at the RELAX NG 
Tutorial by James Clark and Murata Makoto. Section 11 (Name Classes) 
handles this issue.



Radu Cernuta

2007/2/6, Jeff Lowery <jlowery@myrio.com>: 
This has got to be a FAQ, but no luck with googling:

Trying to find a shorthand method to validate content using lax 
constraints in RELAX NG.  I want something like this:

namespace foo = "http://www.w3.org/foo";

qux =
    element baz {empty}     # some element 

bar =
    element bar { anyLax* }  #allow baz, bar, anyOtherElement

anyOtherElement =
  element * - foo:*  {        # any elements not in this namespace
    attribute * { text }*,
     | anyOtherElement)*

anyLax = (
        grammar {*}             #all patterns


Don't work, though.

Only examples I've seen enumerate all the grammars by name in the 
schema. Doesn't appear there is wildcard of that type.


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