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Re: Derivation by Restriction and Namespaces - SQC Bug?

From: Martin Bernauer <bernauer@dke.uni-linz.ac.at>
Date: Thu, 3 Jan 2002 10:40:46 +0100
Message-ID: <002201c1943a$edad0dc0$ca3a4e8c@dke.unilinz.ac.at>
To: <xmlschema-dev@w3.org>
Cc: "Jeff Lowery" <jlowery@scenicsoft.com>
I use the latest version of SQC, 1.2.1.003. I have enclosed the reported error
message below.
martin

   ------------------------------------------------------------------------
F:\test>sqc test1b.xsd
Initializing Schema Quality Checker. Please wait ...
SchemaQualityChecker has been initialized
PROCESSING test1b.xsd time : 2002-01-03T10:36:25 ...
test1b.xsd (file 1 of 1) now being read ...
ERROR
 file = file:F:/test/test1b.xsd line 21 column 19
SEVERITY: 1
ERROR TYPE: 2
MESSAGE
TYPE REFINEMENT ERROR (content type incompatible with the content type of the
basetype):
In the definition of complexType http://test1b:RestrictedList, elementOnly
content model (<xs:sequence maxOccurs="1" minOccurs="1">
    <xs:element maxOccurs="1" minOccurs="1" name="entry"
        type="t1b:RestrictedEntry" xmlns:t1b="http://test1b"/>
</xs:sequence>
) is not a restriction of elementOnly content model (<xs:sequence maxOccurs="1"
minOccurs="1">
    <xs:element maxOccurs="1" minOccurs="1" name="entry"
        type="t1a:BasicEntry" xmlns:t1a="http://test1a"/>
</xs:sequence>
), the content type defined by the basetype.
   ------------------------------------------------------------------------

----- Original Message -----
From: "Jeff Lowery" <jlowery@scenicsoft.com>

> Shouldn't get any error.
>
> When I run the example through SQC (version 1.2.004), I don't get the error
> you're seeing. Are you running a newer or older version?
>
> > -----Original Message-----
> > From: Martin Bernauer [mailto:bernauer@dke.uni-linz.ac.at]
> > Sent: Wednesday, January 02, 2002 6:27 AM
> > To: xmlschema-dev@w3.org
> > Subject: Derivation by Restriction and Namespaces - SQC Bug?
> >
> >
> > I have troubles concerning derivation by restriction
> > concerning namespaces. When
> > I derive a new type by restriction and want to put it in
> > another namespace than
> > the one of its base type, SQC from alphaworks [1] detects an error.
> >
> > To illustrate this consider the following example, depicting
> > two schemas. Schema
> > test1a.xsd defines a "BasicEntry" Type and a "BasicList"
> > Type, the contents
> > model of the latter type comprises "entry" elements of type
> > BasicEntry.
> >
> > ----------[begin schema test1a.xsd ]----------
> > <xs:schema targetNamespace="http://test1a"
> > xmlns:t1a="http://test1a" ...>
> >   <xs:complexType name="BasicEntry">
> >     <xs:sequence>
> >       <xs:any/>
> >     </xs:sequence>
> >   </xs:complexType>
> >   <xs:complexType name="BasicList">
> >     <xs:sequence>
> >       <xs:element name="entry" type="t1a:BasicEntry"/>
> >     </xs:sequence>
> >   </xs:complexType>
> > </xs:schema>
> > ----------[end schema test1a.xsd ]----------
> >
> > A second schema, test1b.xsd, derives a new type "RestrictedEntry" from
> > BasicEntry by restriction and a new type "RestrictedList"
> > from BasicList. Notice
> > that the namespace of RestrictedList is http://test1b, while
> > the namespace of
> > BasicList is http://test1a.
> >
> > ----------[begin schema test1b.xsd ]----------
> > <xs:schema targetNamespace="http://test1b" xmlns:t1a="http://test1a"
> > xmlns:t1b="http://test1b" ...>
> >   <xs:import namespace="http://test1a" schemaLocation="test1a.xsd"/>
> >   <xs:complexType name="RestrictedEntry">
> >     <xs:complexContent>
> >       <xs:restriction base="t1a:BasicEntry">
> >         <xs:sequence>
> >           <xs:element name="restrictingElement" type="xs:string"/>
> >         </xs:sequence>
> >       </xs:restriction>
> >     </xs:complexContent>
> >   </xs:complexType>
> >   <xs:complexType name="RestrictedList">
> >     <xs:complexContent>
> >       <xs:restriction base="t1a:BasicList">
> >         <xs:sequence>
> >           <xs:element name="entry" type="t1b:RestrictedEntry"/>
> >         </xs:sequence>
> >       </xs:restriction>
> >     </xs:complexContent>
> >   </xs:complexType>
> > </xs:schema>
> > ----------[end schema test1b.xsd ]----------
> >
> > When validating test1b.xsd, SQC throws an error reporting
> > that the contents
> > model of RestrictedList is not a restriction of BasicList.
> >
> > However, when having all (four) complex type definitions in
> > the same namespace,
> > SQC accepts the schemas. Since the restrictions themselves
> > seem to be valid
> > irrespective of the namespaces this seems to be a bug of SQC
> > for me. Or is the
> > restriction by itself invalid? Any comments on this?
> >
> > Btw XSV (version 2001/11/29) validates test1b.xsd without
> > reporting any
> > problems.
> >
> > Regards, Martin
> >
> > [1] http://www.alphaworks.ibm.com/tech/xmlsqc
> >
> > ps: I wasn't able to post this to the SQC discussion forum,
> > sorry for any
> > inconvienience my posting here may cause, nevertheless it's
> > also an XML Schema
> > specific question.
> >
>
Received on Thursday, 3 January 2002 04:39:06 GMT

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