I'm trying to write a schema that allows me to substitute entensions
for a base type. The schema (included below) defines a StepType and
an AnnouncementSte pType that is an extension of the base type.
Unfortunately, my XML example fails validation. When I omit PromptID,
the Visual Studio Taskpane reads: "The element 'urn:Test:Step' has
incomplete content. Expected 'urn:Test:Promp tID'. An error occurred at
, (11, 7).". If I add in <PromptID></PromptID> into the file, the
validation fails again, but this time with the message: "The active
schema does not support the element 'PromptID'." I've attempted to
add in <lh:PromptID /> with the same result.
Does anyone have any ideas on how I can get this to work in Visual
Studio? I've tried programmaticall y validating the document and that
fails horribly claiming that all elements are invalid.
Schema
-------------------------------------------------
<?xml version="1.0" encoding="utf-8" ?>
<xs:schema targetNamespace ="urn:Test" xmlns:lh="urn:T est"
elementFormDefa ult="qualified"
xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:complexTy pe name="StepType" abstract="true" >
<xs:sequence>
<xs:element name="Type" />
<xs:element name="AssemblyL ocation" />
<xs:element name="Version" />
</xs:sequence>
</xs:complexType>
<xs:complexTy pe name="AnnounceS tepType">
<xs:complexCont ent>
<xs:extension base="lh:StepTy pe">
<xs:sequence>
<xs:element minOccurs="1" maxOccurs="1" name="PromptID"
type="xs:string " />
</xs:sequence>
</xs:extension>
</xs:complexConte nt>
</xs:complexType>
<xs:element name="Module">
<xs:complexType >
<xs:sequence>
<xs:element minOccurs="1" maxOccurs="1" name="Name"
type="xs:string " />
<xs:sequence>
<xs:element minOccurs="1" maxOccurs="unbo unded" name="Step"
type="lh:StepTy pe" />
</xs:sequence>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
XML Sample
-------------------------------------------
<?xml version="1.0" encoding="utf-8"?>
<Module xmlns:lh="urn:T est"
xmlns:xsi="http ://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http ://www.w3.org/2001/XMLSchema" xmlns="urn:Test ">
<Name>Test Module</Name>
<Step xsi:type="Annou nceStepType"
xmlns:xsi="http ://www.w3.org/2001/XMLSchema-instance">
<Type>
</Type>
<AssemblyLocati on>
</AssemblyLocatio n>
<Version>
</Version>
</Step>
</Module>
