XmlValidatingRe ader

[Bernhard Felkel]

I have troubles validating XML files with key/keyref constraints.

Here´s my schema:
<?xml version="1.0" encoding="utf-8"?>
<xsd:schema xmlns:xsd="http ://www.w3.org/2001/XMLSchema"
xmlns:transNS=" http://Festo.Common.Tr anslation"
xmlns="http://Festo.Common.Tr anslation"
targetNamespace ="http://Festo.Common.Tr anslation"
elementFormDefa ult="qualified" attributeFormDe fault="unqualif ied"
version="1.0.1" >
<xsd:simpleTy pe name="stVersion Syntax">
<xsd:restrictio n base="xsd:strin g">
<xsd:pattern value="V[0-9]+\.[0-9]+\.[0-9]+"/>
<!-- e.g. V1.0.0, checked -->
</xsd:restriction >
</xsd:simpleType>
<xsd:element name="Translati onTable" type="ctTransla tionTable">
<xsd:key name="LangKey">
<xsd:selector xpath="transNS: Language"/>
<xsd:field xpath="@ID"/>
</xsd:key>
<xsd:keyref name="LangKeyRe f" refer="transNS: LangKey">
<xsd:selector xpath="transNS: Item/Translation"/>
<xsd:field xpath="@Languag e"/>
</xsd:keyref>
</xsd:element>
<xsd:complexTyp e name="ctTransla tionItem">
<xsd:sequence >
<xsd:element name="Translati on" type="ctTransla tion"
maxOccurs="unbo unded"/>
<xsd:element name="Parameter " type="ctParamet er" minOccurs="0"
maxOccurs="unbo unded"/>
</xsd:sequence>
<xsd:attribut e name="ID" type="xsd:strin g" use="required"/>
<!-- word to translate -->
</xsd:complexType >
<xsd:complexTyp e name="ctTransla tionTable">
<xsd:sequence >
<!-- general file information -->
<xsd:element name="Language" type="ctLanguag e" minOccurs="0"
maxOccurs="unbo unded"/>
<xsd:element name="Item" type="ctTransla tionItem" minOccurs="0"
maxOccurs="unbo unded">
<xsd:key name="TransKey" >
<xsd:selector xpath="./Translation"/>
<xsd:field xpath="@Languag e"/>
</xsd:key>
</xsd:element>
</xsd:sequence>
<xsd:attribut e name="Version" type="stVersion Syntax"/>
<!-- version of the file -->
</xsd:complexType >
<xsd:complexTyp e name="ctTransla tion">
<xsd:attribut e name="Language" type="xsd:strin g" use="required"/>
<xsd:attribut e name="Content" type="xsd:strin g" use="required"/>
</xsd:complexType >
<xsd:complexTyp e name="ctParamet er">
<xsd:attribut e name="Index" type="xsd:int" use="required"/>
<xsd:attribut e name="Ref" type="xsd:strin g" use="required"/>
</xsd:complexType >
<xsd:complexTyp e name="ctLanguag e">
<xsd:attribut e name="ID" type="xsd:strin g" use="required"/>
<xsd:attribut e name="Descripti on" type="xsd:strin g" use="required"/>
</xsd:complexType >
</xsd:schema>

I define a key for the Languages and a keyref for each Translation item.
Here´s my XML-File:
<?xml version="1.0" encoding="UTF-8"?>
<TranslationTab le xmlns="http://Festo.Common.Tr anslation"
xmlns:xsi="http ://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocat ion="http://Festo.Common.Tr anslation
S:\Festo\Packag es\Common\Festo .Common.Transla tion\XmlTransla tionTable.xsd">
<Language Description="En glish" ID="EN"/>
<Item ID="Zero point">
<Translation Language="EN" Content="Zero point"/>
<Translation Language="DE" Content="Nullpu nkt"/>
</Item>
</TranslationTabl e>

The Translation Item references the language "DE" which is not a member of
the languages. So, this must lead to a validation error but it does not!
A duplicate key is handled correctly while a missing keyref is not.
What´s interesting to me is that, if there is no namespace defined,
validation works fine.

Here´s my C# code snipped which validates the xml file:
m_SchemaCollect ion = new XmlSchemaCollec tion();
XmlTextReader xsdReader = new
XmlTextReader(t ypeof(Translati onTable).Assemb ly.GetManifestR esourceStream(" Festo.Common.Tr anslation.XmlTr anslationTable. xsd"));
m_SchemaCollect ion.Add(m_XmlNa mespace, xsdReader);
xsdReader.Close ();

StreamReader s= System.IO.File. OpenText(sTrans lationTableFile );
string xmlFrag = s.ReadToEnd();
NameTable nt = new NameTable();
XmlNamespaceMan ager nsmgr = new XmlNamespaceMan ager(nt);
XmlParserContex t context = new XmlParserContex t(null, nsmgr, null,
XmlSpace.None);
xmlValidatingRe ader = new XmlValidatingRe ader(xmlFrag,
XmlNodeType.Ele ment, context);
xmlValidatingRe ader.Schemas.Ad d(m_SchemaColle ction);
xmlValidatingRe ader.Validation Type=Validation Type.Schema;
xmlValidatingRe ader.Validation EventHandler+=n ew
ValidationEvent Handler(transVa lidator_Validat ionEventHandler ); //PLEASE ADD A
VALIDATION HANDLER
while (xmlValidatingR eader.Read()){} //Loop through elements
//f you reach here without hitting validations, you are OK
MessageBox.Show ("DONE");
s.Close();

I validated the XML with both, the XMLSpy and the Sun-Xml Validator and both
detected the missing keyref!

What´s going wrong here?
Thank´s for your help in advance
Bernhard

[Stan Kitsis [MSFT]]

You need to specify transNS prefix in ALL XPath expressions. In the schema
below, you only do it in a few places. When I updated the rest of the
expressions, system.xml generated the following errors:
- The identity constraint 'http://Festo.Common.Tr anslation:LangK ey'
validation has failed. Either a key is missing or the existing key has an
empty node.
- The identity constraint 'http://Festo.Common.Tr anslation:Trans Key'
validation has failed. Either a key is missing or the existing key has an
empty node.
- The identity constraint 'http://Festo.Common.Tr anslation:Trans Key'
validation has failed. Either a key is missing or the existing key has an
empty node.

--
Stan Kitsis
Program Manager, XML Technologies
Microsoft Corporation

This posting is provided "AS IS" with no warranties, and confers no rights.
Use of included script samples are subject to the terms specified at
http://www.microsoft.com/info/cpyright.htm
"Bernhard Felkel" <Bernhard Fe****@discussi ons.microsoft.c om> wrote in
message news:7F******** *************** ***********@mic rosoft.com...

I have troubles validating XML files with key/keyref constraints.

Here´s my schema:
<?xml version="1.0" encoding="utf-8"?>
<xsd:schema xmlns:xsd="http ://www.w3.org/2001/XMLSchema"
xmlns:transNS=" http://Festo.Common.Tr anslation"
xmlns="http://Festo.Common.Tr anslation"
targetNamespace ="http://Festo.Common.Tr anslation"
elementFormDefa ult="qualified" attributeFormDe fault="unqualif ied"
version="1.0.1" >
<xsd:simpleTy pe name="stVersion Syntax">
<xsd:restrictio n base="xsd:strin g">
<xsd:pattern value="V[0-9]+\.[0-9]+\.[0-9]+"/>
<!-- e.g. V1.0.0, checked -->
</xsd:restriction >
</xsd:simpleType>
<xsd:element name="Translati onTable" type="ctTransla tionTable">
<xsd:key name="LangKey">
<xsd:selector xpath="transNS: Language"/>
<xsd:field xpath="@ID"/>
</xsd:key>
<xsd:keyref name="LangKeyRe f" refer="transNS: LangKey">
<xsd:selector xpath="transNS: Item/Translation"/>
<xsd:field xpath="@Languag e"/>
</xsd:keyref>
</xsd:element>
<xsd:complexTyp e name="ctTransla tionItem">
<xsd:sequence >
<xsd:element name="Translati on" type="ctTransla tion"
maxOccurs="unbo unded"/>
<xsd:element name="Parameter " type="ctParamet er" minOccurs="0"
maxOccurs="unbo unded"/>
</xsd:sequence>
<xsd:attribut e name="ID" type="xsd:strin g" use="required"/>
<!-- word to translate -->
</xsd:complexType >
<xsd:complexTyp e name="ctTransla tionTable">
<xsd:sequence >
<!-- general file
-->
<xsd:element name="Language" type="ctLanguag e" minOccurs="0"
maxOccurs="unbo unded"/>
<xsd:element name="Item" type="ctTransla tionItem" minOccurs="0"
maxOccurs="unbo unded">
<xsd:key name="TransKey" >
<xsd:selector xpath="./Translation"/>
<xsd:field xpath="@Languag e"/>
</xsd:key>
</xsd:element>
</xsd:sequence>
<xsd:attribut e name="Version" type="stVersion Syntax"/>
<!-- version of the file -->
</xsd:complexType >
<xsd:complexTyp e name="ctTransla tion">
<xsd:attribut e name="Language" type="xsd:strin g" use="required"/>
<xsd:attribut e name="Content" type="xsd:strin g" use="required"/>
</xsd:complexType >
<xsd:complexTyp e name="ctParamet er">
<xsd:attribut e name="Index" type="xsd:int" use="required"/>
<xsd:attribut e name="Ref" type="xsd:strin g" use="required"/>
</xsd:complexType >
<xsd:complexTyp e name="ctLanguag e">
<xsd:attribut e name="ID" type="xsd:strin g" use="required"/>
<xsd:attribut e name="Descripti on" type="xsd:strin g" use="required"/>
</xsd:complexType >
</xsd:schema>

I define a key for the Languages and a keyref for each Translation item.
Here´s my XML-File:
<?xml version="1.0" encoding="UTF-8"?>
<TranslationTab le xmlns="http://Festo.Common.Tr anslation"
xmlns:xsi="http ://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocat ion="http://Festo.Common.Tr anslation
S:\Festo\Packag es\Common\Festo .Common.Transla tion\XmlTransla tionTable.xsd">
<Language Description="En glish" ID="EN"/>
<Item ID="Zero point">
<Translation Language="EN" Content="Zero point"/>
<Translation Language="DE" Content="Nullpu nkt"/>
</Item>
</TranslationTabl e>

The Translation Item references the language "DE" which is not a member of
the languages. So, this must lead to a validation error but it does not!
A duplicate key is handled correctly while a missing keyref is not.
What´s interesting to me is that, if there is no namespace defined,
validation works fine.

Here´s my C# code snipped which validates the xml file:
m_SchemaCollect ion = new XmlSchemaCollec tion();
XmlTextReader xsdReader = new
XmlTextReader(t ypeof(Translati onTable).Assemb ly.GetManifestR esourceStream(" Festo.Common.Tr anslation.XmlTr anslationTable. xsd"));
m_SchemaCollect ion.Add(m_XmlNa mespace, xsdReader);
xsdReader.Close ();

StreamReader s= System.IO.File. OpenText(sTrans lationTableFile );
string xmlFrag = s.ReadToEnd();
NameTable nt = new NameTable();
XmlNamespaceMan ager nsmgr = new XmlNamespaceMan ager(nt);
XmlParserContex t context = new XmlParserContex t(null, nsmgr, null,
XmlSpace.None);
xmlValidatingRe ader = new XmlValidatingRe ader(xmlFrag,
XmlNodeType.Ele ment, context);
xmlValidatingRe ader.Schemas.Ad d(m_SchemaColle ction);
xmlValidatingRe ader.Validation Type=Validation Type.Schema;
xmlValidatingRe ader.Validation EventHandler+=n ew
ValidationEvent Handler(transVa lidator_Validat ionEventHandler ); //PLEASE
ADD A
VALIDATION HANDLER
while (xmlValidatingR eader.Read()){} //Loop through elements
//f you reach here without hitting validations, you are OK
MessageBox.Show ("DONE");
s.Close();

I validated the XML with both, the XMLSpy and the Sun-Xml Validator and
both
detected the missing keyref!

What´s going wrong here?
Thank´s for your help in advance
Bernhard