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Re: substitutionGroup across namespaces

From: Mark Proctor <mproctor@codehaus.org>
Date: Mon, 25 Oct 2004 14:52:19 +0200
Message-ID: <417CF703.4040307@codehaus.org>
To: George Cristian Bina <george@sync.ro>
CC: xmlschema-dev@w3.org

I've resolved the issue. I returned to my original code and property, 
turns out its the array order - rules.xsd must be in the array before 
the other .xsds, is that a bug?

Thanks for your patience and help

Mark
Mark Proctor wrote:

>
> I just tried it doing getResource and toExternalForm which produces 
> the following string:
> jar:file:/D:/java/workspaces/drools/target/drools-java-2.0-beta-18.jar!/META-INF/java.xsd 
> jar:file:/D:/java/workspaces/drools/target/drools-python-2.0-beta-18.jar!/META-INF/python.xsd 
> jar:file:/D:/java/workspaces/drools/target/drools-groovy-2.0-beta-18.jar!/META-INF/groovy.xsd 
> jar:file:/D:/java/workspaces/drools/target/drools-base-2.0-beta-18.jar!/META-INF/rules.xsd 
>
>
> I do this using the following code:
> URL java = cl.getResource( "META-INF/java.xsd" );
> URL python = cl.getResource( "META-INF/python.xsd" );
> URL groovy = cl.getResource( "META-INF/groovy.xsd" );
> URL rules = cl.getResource( "META-INF/rules.xsd" );
> String url = "";
>
> if ( java != null ) url = url + java.toExternalForm() + " ";
> if ( python != null ) url = url + python.toExternalForm() + " ";
> if ( groovy != null ) url = url + groovy.toExternalForm() + " ";
> if ( rules != null ) url = url + rules.toExternalForm();
>
> parser.setProperty( JAXP_SCHEMA_LANGUAGE, W3C_XML_SCHEMA );
> parser.setProperty("http://apache.org/xml/properties/schema/external-schemaLocation", 
> url);
>
> But now I get the following error, like its not finding the xsds at all:
> (jar:file:/D:/java/workspaces/drools/drools-examples/target/drools-examples-2.0-beta-18.jar!/org/drools/examples/fibonacci/fibonacci.java.drl:5,57) 
> : cvc-elt.1: Cannot find the declaration of element 'rule-set'.
>
> Mark
> Mark Proctor wrote:
>
>> I currently use:
>>    private static final String JAXP_SCHEMA_LANGUAGE = 
>> "http://java.sun.com/xml/jaxp/properties/schemaLanguage";
>>    private static final String W3C_XML_SCHEMA       = 
>> "http://www.w3.org/2001/XMLSchema";
>>    private static final String SCHEMA_SOURCE        = 
>> "http://java.sun.com/xml/jaxp/properties/schemaSource";
>> As detailed in the following IBM article:
>> http://www-106.ibm.com/developerworks/xml/library/x-tipvalschm/
>> I do know that our original xsds worked with that property, but that 
>> was where we imported the java namespace into rules.xsd and used choice.
>>
>> I'm looking at xerces and see that it has its own properties as well.
>> http://xml.apache.org/xerces-j/properties.html
>> However using this property I can no longer specify the xsds as an 
>> InputStream, how would I specify urls for  files that are in jars, 
>> which themselves are in the classpath?
>>
>> Regards
>>
>> Mark
>> George Cristian Bina wrote:
>>
>>> Hi Mark,
>>>
>>> Well, the following schemas plus instance are valid(Xerces 2.6.2). I 
>>> do not know what SCHEMA_SOURCE contains in your code line:
>>>
>>> parser.setProperty(SCHEMA_SOURCE,( InputStream[] ) 
>>> schemaList.toArray( new InputStream[0] ) );
>>>
>>> You may try setting a value similar with the one from schemaLocation 
>>> attribute to the 
>>> http://apache.org/xml/properties/schema/external-schemaLocation 
>>> property.
>>>
>>> rules.xsd
>>> =========
>>>
>>> <?xml version="1.0" encoding="UTF-8"?>
>>> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" 
>>> targetNamespace="http://drools.org/rules"
>>>     elementFormDefault="qualified" 
>>> xmlns:rules="http://drools.org/rules">
>>>     <xs:element name="rule-set">
>>>         <xs:complexType>
>>>             <xs:sequence>
>>>                 <xs:element minOccurs="0" maxOccurs="unbounded" 
>>> ref="rules:rule"/>
>>>             </xs:sequence>
>>>             <xs:attribute name="name" use="required" type="xs:string"/>
>>>             <xs:attribute name="description" type="xs:string"/>
>>>         </xs:complexType>
>>>     </xs:element>
>>>     <xs:element name="rule">
>>>         <xs:complexType>
>>>             <xs:sequence>
>>>                 <xs:element name="parameter" maxOccurs="unbounded">
>>>                     <xs:complexType>
>>>                         <xs:sequence>
>>>                             <xs:element ref="rules:class"/>
>>>                         </xs:sequence>
>>>                         <xs:attribute name="identifier" 
>>> use="required" type="xs:string"/>
>>>                     </xs:complexType>
>>>                 </xs:element>
>>>                 <xs:element ref="rules:condition" 
>>> maxOccurs="unbounded"/>
>>>                 <xs:element ref="rules:consequence"/>
>>>             </xs:sequence>
>>>             <xs:attribute name="name" use="required" type="xs:string"/>
>>>             <xs:attribute name="salience" type="xs:integer"/>
>>>             <xs:attribute name="no-loop" type="xs:boolean"/>
>>>             <xs:attribute name="description" type="xs:string"/>
>>>         </xs:complexType>
>>>     </xs:element>
>>>     <xs:element name="class" type="xs:string" abstract="true"/>
>>>     <xs:element name="condition" type="xs:string" abstract="true"/>
>>>     <xs:element name="consequence" type="xs:string" abstract="true"/>
>>> </xs:schema>
>>>
>>> java.xsd
>>> ========
>>>
>>> <?xml version="1.0" encoding="UTF-8"?>
>>> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
>>>     targetNamespace="http://drools.org/semantics/java" 
>>> elementFormDefault="qualified"
>>>     xmlns:java="http://drools.org/semantics/java" 
>>> xmlns:rules="http://drools.org/rules">
>>>     <xs:import namespace="http://drools.org/rules" 
>>> schemaLocation="rules.xsd"/>
>>>     <xs:element name="class" type="xs:string" 
>>> substitutionGroup="rules:class"/>
>>>     <xs:element name="condition" type="xs:string" 
>>> substitutionGroup="rules:condition"/>
>>>     <xs:element name="consequence" type="xs:string" 
>>> substitutionGroup="rules:consequence"/>
>>> </xs:schema>
>>>
>>> sample.xml
>>> ==========
>>>
>>> <?xml version="1.0" encoding="UTF-8"?>
>>> <rule-set name="fibonacci" xmlns="http://drools.org/rules"
>>>     xmlns:java="http://drools.org/semantics/java"
>>>     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
>>> xsi:schemaLocation="http://drools.org/semantics/java java.xsd 
>>> http://drools.org/rules rules.xsd">
>>>     <rule name="Recurse" salience="10">
>>>         <parameter identifier="f">
>>>
>>> <java:class>org.drools.examples.fibonacci.Fibonacci</java:class>
>>>         </parameter>
>>>         <java:condition>f.getValue() == -1</java:condition>
>>>         <java:consequence> System.err.println( "recurse for " + 
>>> f.getSequence() );
>>>             drools.assertObject( new Fibonacci( f.getSequence() - 1 
>>> ) ); </java:consequence>
>>>     </rule>
>>> </rule-set>
>>>
>>> Best Regards,
>>> George
>>> ---------------------------------------------------------------------
>>> George Cristian Bina
>>> <oXygen/> XML Editor, Schema Editor and XSLT Editor/Debugger
>>> http://www.oxygenxml.com
>>>
>>>
>>
>>
>
>
>
>
Received on Monday, 25 October 2004 12:52:53 UTC

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