No problem, I'm sure it will be quite useful for other readers. Will you post the working schema?
Thanks, Cezar > -----Original Message----- > From: Erik van Zijst [mailto:[EMAIL PROTECTED] > Sent: Friday, March 10, 2006 11:06 AM > To: [email protected] > Subject: Re: off-topic: substitutiongroups and inheritance > > Nevermind, I think I solved it. > > I missed the substitution group relation between the abstract types and > the head. I just added substitutionGroup="shape" to fgshape and bgshape > and now it works. > I guess I just missed it as I was relying too much on inheritance. I > probably figured the hierarchy alone was enough for <eraseShape> to > accept <cloud>, as you would expect in OOP, so I didn't bother to apply > them to the abstract types. > > Thanks for being my rubber duck ;) > Erik > > > Erik van Zijst wrote: > > Let me apologize in advance for the fact that this question is not > > directly a xmlbeans issue. Instead, it's something I ran into several > > times while using xmlbeans. I know I'd better take it to a decent xml > > forum, but with all the expertise here, let me give it a try > nevertheless. > > > > > > I'm having trouble translating my object inheritance models to xmlschema > > and have illustrated this in the attached example xsd and xml. > > > > In my example I have a canvas for drawing a new painting and the xsd > > contains the instructions for drawing this painting. According to > > instructor Bob, a painting constists of two basic parts: background and > > foreground. An object is either a background or foreground object. > > In the final stage, Bob removes objects that turned out ugly. This can > > be any type of object. > > > > The schema defines an abstract type "shape" which "fgshape" and gbshape" > > inherit from. It uses substitutiongroups with head "shape". > > <drawBackground> only accepts background shapes, <drawForeground> only > > accepts foreground shapes, while <eraseShapes> accepts everything. > > > > The problem is that the painting as defined in painting.xml is not valid > > according to the schema, because <eraseShapes> expects an element of > > type <shape>, rather than <cloud> or its substitutiongroup <fgshape>. > > The error xmlbeans gives is: > > Validation error at line: 12: Expected element > > '[EMAIL PROTECTED]://prutser.cx/schemas/painting' instead of > > '[EMAIL PROTECTED]://prutser.cx/schemas/painting' here in element > > [EMAIL PROTECTED]://prutser.cx/schemas/painting > > > > In an OO programming language this is not a problem. Cloud extends > > fgshape, while fgshape extends shape, so you'll have no problem passing > > a cloud instance to eraseShapes. > > > > How does one tackle this problem? Am I using substitutionGroups > > incorrectly? I do want to be able to use the names of the concrete > > elements, rather than <shape type="cloud" color="white" > > cloudtype="cumulunimbus"/> if that's possible. > > > > Erik van Zijst > > > > > > ------------------------------------------------------------------------ > > > > <?xml version="1.0" encoding="UTF-8"?> > > <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"; > > targetNamespace="http://prutser.cx/schemas/painting"; > > xmlns="http://prutser.cx/schemas/painting"; > > xmlns:tns="http://prutser.cx/schemas/painting"; > > xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";> > > > > <xs:element name="painting"> > > <xs:complexType> > > <xs:sequence> > > <xs:element ref="drawBackground"/> > > <xs:element ref="drawForeground"/> > > <xs:element ref="eraseShapes"/> > > </xs:sequence> > > </xs:complexType> > > </xs:element> > > > > <xs:element name="drawBackground"> > > <xs:complexType> > > <xs:sequence> > > <xs:element ref="bgshape" minOccurs="1" > maxOccurs="unbounded"/> > > </xs:sequence> > > </xs:complexType> > > </xs:element> > > > > <xs:element name="drawForeground"> > > <xs:complexType> > > <xs:sequence> > > <xs:element ref="fgshape" minOccurs="1" > maxOccurs="unbounded"/> > > </xs:sequence> > > </xs:complexType> > > </xs:element> > > > > <xs:element name="eraseShapes"> > > <xs:complexType> > > <xs:sequence> > > <xs:element ref="shape" minOccurs="1" > maxOccurs="unbounded"/> > > </xs:sequence> > > </xs:complexType> > > </xs:element> > > > > <xs:element name="shape" type="shape-type" abstract="true"/> > > <xs:complexType name="shape-type" abstract="true"> > > <xs:attribute name="color" type="xs:string" use="required"/> > > <xs:attribute name="preferredBrush" type="xs:string" > use="optional"/> > > </xs:complexType> > > > > <xs:element name="bgshape" type="bgshape-type" abstract="true"/> > > <xs:complexType name="bgshape-type" abstract="true"> > > <xs:complexContent> > > <xs:extension base="shape-type"/> > > </xs:complexContent> > > </xs:complexType> > > > > <xs:element name="cloud" type="cloud-type" > substitutionGroup="bgshape"/> > > <xs:complexType name="cloud-type"> > > <xs:complexContent> > > <xs:extension base="bgshape-type"> > > <xs:attribute name="cloudtype" type="xs:string" > use="required"/> > > </xs:extension> > > </xs:complexContent> > > </xs:complexType> > > > > <xs:element name="fgshape" type="fgshape-type" abstract="true"/> > > <xs:complexType name="fgshape-type" abstract="true"> > > <xs:complexContent> > > <xs:extension base="shape-type"/> > > </xs:complexContent> > > </xs:complexType> > > > > <xs:element name="tree" type="tree-type" > substitutionGroup="fgshape"/> > > <xs:complexType name="tree-type"> > > <xs:complexContent> > > <xs:extension base="fgshape-type"> > > <xs:attribute name="height" type="xs:int" > use="optional"/> > > </xs:extension> > > </xs:complexContent> > > </xs:complexType> > > > > </xs:schema> > > > > > > ------------------------------------------------------------------------ > > > > <?xml version="1.0" encoding="UTF-8"?> > > <painting xmlns="http://prutser.cx/schemas/painting"; > > xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";> > > > > <drawBackground> > > <cloud color="white" cloudtype="cumulunimbus"/> > > </drawBackground> > > <drawForeground> > > <tree color="green" height="22"/> > > </drawForeground> > > <eraseShapes> > > <cloud color="white" cloudtype="cumulunimbus"/> > > </eraseShapes> > > </painting> > > > > > > ------------------------------------------------------------------------ > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] _______________________________________________________________________ Notice: This email message, together with any attachments, may contain information of BEA Systems, Inc., its subsidiaries and affiliated entities, that may be confidential, proprietary, copyrighted and/or legally privileged, and is intended solely for the use of the individual or entity named in this message. 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