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XML-L  November 2005

XML-L November 2005

Subject:

xsd namespace problem with 2 level substitution groups

From:

sreedevi crk <[log in to unmask]>

Reply-To:

General discussion of Extensible Markup Language <[log in to unmask]>

Date:

Wed, 16 Nov 2005 19:42:17 -0800

Content-Type:

text/plain

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text/plain (106 lines)

Hi all
 
I am currently working on a project based on MDA architecture, wherein a different group maintains information data model and creates xml schemas and gives to my group. Basically everyone in the company is new to xml/xsd world. 
We are trying to solve the problem of validating instance documents of the substitution groups (with abstract elements and complex types) which is more than one level deep. 
 
Details and the xsds are as follows:
  A.1) I tried using abstract complex type/element with substitution groups that are two levels deep.
A.2) But I am unable to validate the calling xsds instance document.
The 3 xsds and the xml file code is below. The files related to A.1 are Participation.xsd and Commons3202.xsd.
The files related to A.2 are VitalSigns3203.xsd and VitalSigns3203.xml.
  Participation.xsd has a complex abstract type. It is imported and a referenced as the data type of an abstract element in Commons3202.xsd. 
Commons3202.xsd is imported to VitalSigns3203.xsd.
  The validation of xml file generated from VitalSigns3203.xsd fails giving the below error:
cvc-complex-type.2.4.a: Invalid content was found starting with element 'signature String'. One of '{"Participation":signatureText}' is expected.
The above error is reproducible in xmlspy, stylus, xerces and jaxp 1.1
  In further investigation I found more info. regarding this problem: The error occurs when each xsd has a different namespace and thus has problem with import statements. 
It works fine when all the xsds are in the same namespace and when include statement is used. 
But I want to avoid name collisions by using different namespaces. 
Thus any input in this regard is highly appreciated.
  Any help in this regard at the earliest is highly appreciated.
   
  The code of each xsd file is as follows:
************************************************** ******************
Paticipation.xsd:
************************************************** ******************
<?xml version="1.0" encoding="ISO-8859-1"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:PARTICIPATION="Participation" targetNamespace="Participation">
<!-- ================================================= -->
<!-- Package: Participation -->
<!-- ================================================= -->
<!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->
<!-- Class: <<ST>> SignatureString -->
<!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->
<xs:element name="signatureString" type="PARTICIPATION:SignatureString" substitutionGroup="PARTICIPATION:signatureText"/>
<xs:complexType name="SignatureString">
<xs:complexContent>
<xs:extension base="PARTICIPATION:SignatureText">
<xs:attribute name="value" type="xs:string" use="required"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
<!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->
<!-- Class: SignatureText -->
<!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->
<xs:element name="signatureText" type="PARTICIPATION:SignatureText" abstract="true"/>
<xs:complexType name="SignatureText" abstract="true"/>
</xs:schema>
************************************************** *********************
Common3202.xsd:
************************************************** *********************
<?xml version="1.0" encoding="ISO-8859-1"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:CM3202="Common3202" xmlns:PARTICIPATION="Participation" targetNamespace="Common3202">
<xs:import namespace="Participation" schemaLocation="Datatypes3203/RDT/Participation.xsd"/>
<!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->
<!-- Class: <<Participation>> PractitionerParticipation -->
<!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->
<xs:element name="practitionerParticipation" type="CM3202:PractitionerParticipation" abstract="true"/>
<xs:complexType name="PractitionerParticipation" abstract="true">
<xs:sequence>
<!--xs:element name="signatureText" type="PARTICIPATION:SignatureText" minOccurs="0"/-->
<xs:element ref="PARTICIPATION:signatureText"/>
</xs:sequence>
</xs:complexType>
<!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->
<!-- Class: <<Participation>> Author -->
<!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->
<xs:element name="author" type="CM3202:Author" substitutionGroup="CM3202 ractitionerParticipation"/>
<xs:complexType name="Author">
<xs:complexContent>
<xs:extension base="CM3202:PractitionerParticipation"/>
</xs:complexContent>
</xs:complexType>
  </xs:schema>
************************************************** ******************
VitalSigns3203.xsd
************************************************** *****************
<?xml version="1.0" encoding="ISO-8859-1"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:VS3203="VitalSigns3203" xmlns:CM3202="Common3202" targetNamespace="VitalSigns3203">
<xs:import namespace="Common3202" schemaLocation="Common3202.xsd"/>
<!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->
<!-- Class: <<Observation>> VitalSignsObservationEvent -->
<!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->
<xs:element name="vitalSignsObservationEvent" type="VS3203:VitalSignsObservationEvent"/>
<xs:complexType name="VitalSignsObservationEvent">
<xs:sequence>
<xs:element name="author" type="CM3202:Author" minOccurs="0">
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:schema>
  ************************************************** ******************
VitalSigns3203.xml
************************************************** *****************
<?xml version="1.0" encoding="UTF-8"?>
<!--Sample XML file generated by XMLSpy v2005 rel. 3 U (http://www.altova.com)-->
<VS3203:vitalSignsObservationEvent xmlns:VS3203="VitalSigns3203" xmlns:CM3202="Common3202" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="VitalSigns3203:\DOCUME~1\vhaislkondas\MYDOCU~1\VHIM3200\VitalSigns3203.xsd">
<CM3202:author>
<signatureString value="String"/> //shows ERROR at this line.
</CM3202:author>
</VS3203:vitalSignsObservationEvent>
 


		
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