'Re: "Re: [xml] schema patch"'

[Kasimier Buchcik <kbuchcik 4commerce de>]

Hi,

on 6/8/2004 6:21 PM Daniel Veillard wrote:
> On Tue, Jun 08, 2004 at 04:48:25PM +0200, Kasimier Buchcik wrote:
> 
>>Hi,
>>
>>Please find attached a small patch for the w3c xml schema processor.
>>
>>This patch includes the following:
>>
>>1. Added Schema Component Constraint: Derivation Valid
>>   (Restriction, Complex) 4.1 - 4.3
>>2. Added Schema Component Constraint: Derivation Valid (Extension) 1.3
> 
> 
>   Hum, out of curiosity, how did you implement it ?
> My take on this was that I would build a function to check if
> an automata A was a subset of an automata B and then compare 
> the compiled automata at the end of the Schemas compilation process.
> I assume you used a different way

The implemented sections 4.1 - 4.2 (restriction) and 1.3 (extension) 
deal with attribute wildcards only - it's just a tiny piece of code. You 
refer to the validity of derivation of the content model; I'm really 
scared of this one ;-) Please take a look at [1].

>>3. Bugfixed function "xmlSchemaBuildCompleteAttributeWildcard",
>>   since it failed to process more than one <attributeGroup> child.
>>   Changed it as well to allow better reaction on internal errors.
>>4. Added some missing function descriptions.
>>
>>Patch files:
>>
>>xmlerror.h.diff, xmlschemas.c.diff
> 
> 
>   okidoc, applied cleanly :-), I just marked a a context attribute as unused
> to avoid a gcc warning.
> 
> 
>>Problems:
>>
>>1. The range to hold all schema xmlParserErrors in the range lower
>>   to 1800 is exhausted.
> 
> 
>   I'm afraid the only solution is to create another range, the simpler
> is to start at 3000 and add them after XML_HTTP_UNKNOWN_HOST /* 2022 */,
> The good point is that there is still plenty of space for the schemas
> validation runtime error (80 or so),

OK.

>   thanks a lot, this should be in CVS within minutes,

[1] http://www.kohsuke.org/xmlschema/XMLSchemaDOsAndDONTs.html#avoid_complex

Thank you & greetings,

Kasimier