Re: [xml] xmllint reports non-determinist content model for schema

["Pete Cordell" <petexmldev codalogic com>]

FWIW, the schema looks OK to me and neither Visual Studio or the W3C's XSV 
seem to report an error, so it does look like a libxml2 bug.

And I can't think of another way of expressing what you want that isn't 
truly non-deterministic.

HTH a bit!

Pete Cordell
Codalogic Ltd
Interface XML to C++ the easy way using C++ XML
data binding to convert XSD schemas to C++ classes.
Visit http://codalogic.com/lmx/ or http://www.xml2cpp.com
for more info

----- Original Message ----- 
From: "Johan Corveleyn" <jcorvel gmail com>
To: <xml gnome org>
Sent: Friday, February 24, 2012 1:14 PM
Subject: [xml] xmllint reports non-determinist content model for schema


> Hi,
>
> This is my first post to this list. I searched the mailing list
> archives and bugzilla, but couldn't find the exact issue I'm
> confronted with (if I missed something, please point me to it).
>
> I'm running into a "non-determinist" error with a schema even though I
> don't think it's non-determinist (and both XSV and Xerces agree with
> me; they too have no problem with the schema). I have reduced my
> test-case to a simple example, see below.
>
> Given the following schema:
>
> <?xml version="1.0" encoding="UTF-8"?>
> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema";>
> <xs:element name="rules">
> <xs:complexType>
> <xs:sequence>
> <xs:element name="rule" minOccurs="0" maxOccurs="unbounded"/>
> <xs:sequence minOccurs="0" maxOccurs="1">
> <xs:element name="specialRule" minOccurs="1" maxOccurs="1"/>
> <xs:element name="rule" minOccurs="0" maxOccurs="unbounded"/>
> </xs:sequence>
> </xs:sequence>
> </xs:complexType>
> </xs:element>
> </xs:schema>
>
> xmllint version 20708 complains with "Schemas parser error : local
> complex type: The content model is not determinist."
>
> The intention is to express that there can be any number of "rule"
> elements, and there can be at most one "specialRule" (at any position
> in between, before, or after the "rule"s). So the following xml's are
> all valid:
>
> <?xml version="1.0" encoding="UTF-8"?>
> <rules>
> <rule/>
> <rule/>
> <specialRule/>
> <rule/>
> </rules>
>
> <?xml version="1.0" encoding="UTF-8"?>
> <rules>
> <specialRule/>
> </rules>
>
> <?xml version="1.0" encoding="UTF-8"?>
> <rules>
> <specialRule/>
> <rule/>
> <rule/>
> <rule/>
> </rules>
>
> <?xml version="1.0" encoding="UTF-8"?>
> <rules>
> <rule/>
> <rule/>
> <rule/>
> </rules>
>
> But this one isn't (two specialRules):
>
> <?xml version="1.0" encoding="UTF-8"?>
> <rules>
> <specialRule/>
> <rule/>
> <rule/>
> <specialRule/>
> <rule/>
> </rules>
>
>
>
> Is this a bug in libxml2?
>
> And whether or not it's a bug: any workarounds? Can I write my schema
> in another way to make xmllint succeed, and still express the same
> constraints?
>
> --
> Johan
> _______________________________________________
> xml mailing list, project page  http://xmlsoft.org/
> xml gnome org
> http://mail.gnome.org/mailman/listinfo/xml