Jim Truher was kind enough to write up some information on getting the most out of PowerShell’s extended type system by showing you how to create your own custom modifications. I modified his starting schema just a bit to make it more Visual Studio friendly (added targetNamespace attribute). Copy the following schema text into a file called something like PowerShellTypeData.xsd and then save that file into the <VS8_INSTALLDIR>\Xml\Schemas diretory. After that when you create a new XML file and type in the first ‘xmlns=" you will get a drop down list of namespace which should contain the targetNamespace used below. After that you will get Intellisense support in the XML editor in VS 2005:
<?xml version="1.0" encoding="utf-8" ?>
<xs:schema
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:vs="http://schemas.microsoft.com/Visual-Studio-Intellisense"
xmlns:pstd="http://schemas.microsoft.com/PowerShell/TypeData/2007/04"
targetNamespace="http://schemas.microsoft.com/PowerShell/TypeData/2007/04"
elementFormDefault="qualified"
attributeFormDefault="unqualified"
vs:friendlyname="PowerShell Type Data"
vs:ishtmlschema="false">
<xs:element name="Name" type="xs:string" />
<xs:complexType name="NoteProperty">
<xs:all>
<xs:element ref="pstd:Name" />
<xs:element name="Value" type="xs:string" />
</xs:all>
</xs:complexType>
<xs:complexType name="AliasProperty">
<xs:all>
<xs:element ref="pstd:Name" />
<xs:element name="ReferencedMemberName" type="xs:string" />
</xs:all>
</xs:complexType>
<xs:complexType name="ScriptMethod">
<xs:all>
<xs:element ref="pstd:Name" />
<xs:element name="Script" type="xs:string" />
</xs:all>
</xs:complexType>
<xs:complexType name="ScriptProperty">
<xs:sequence>
<xs:element ref="pstd:Name" minOccurs="1" maxOccurs="1" />
<xs:element name="GetScriptBlock" type="xs:string" minOccurs="0" maxOccurs="1" />
<xs:element name="SetScriptBlock" type="xs:string" minOccurs="0" maxOccurs="1" />
</xs:sequence>
</xs:complexType>
<xs:complexType name="CodeReference">
<xs:all>
<xs:element name="TypeName"/>
<xs:element name="MethodName"/>
</xs:all>
</xs:complexType>
<xs:complexType name="CodeMethod">
<xs:sequence>
<xs:element name="Name" type="xs:string"/>
<xs:element name="CodeReference" type="pstd:CodeReference"/>
</xs:sequence>
</xs:complexType>
<xs:complexType name="CodeProperty">
<xs:all>
<xs:element name="Name" type="xs:string" />
<xs:element name="GetCodeReference" type="pstd:CodeReference" minOccurs="0" maxOccurs="1" />
<xs:element name="SetCodeReference" type="pstd:CodeReference" minOccurs="0" maxOccurs="1" />
</xs:all>
</xs:complexType>
<xs:complexType name="PropertySet">
<xs:sequence>
<xs:element ref="pstd:Name" />
<xs:element name="ReferencedProperties" />
</xs:sequence>
</xs:complexType>
<xs:complexType name="Members">
<xs:sequence>
<xs:choice maxOccurs="unbounded">
<xs:element name="NoteProperty" type="pstd:NoteProperty" />
<xs:element name="AliasProperty" type="pstd:AliasProperty" />
<xs:element name="ScriptProperty" type="pstd:ScriptProperty" />
<xs:element name="CodeProperty" type="pstd:CodeProperty" />
<xs:element name="ScriptMethod" type="pstd:ScriptMethod" />
<xs:element name="CodeMethod" type="pstd:CodeMethod" />
<xs:element name="MemberSet" type="pstd:MemberSet" />
<xs:element name="PropertySet" type="pstd:PropertySet" />
</xs:choice>
</xs:sequence>
</xs:complexType>
<xs:complexType name="MemberSet">
<xs:all>
<xs:element name="Name" type="xs:string"/>
<xs:element name="Members" type="pstd:Members" />
</xs:all>
</xs:complexType>
<xs:element name="Types">
<xs:complexType>
<xs:sequence>
<xs:element name="Type" maxOccurs="unbounded">
<xs:complexType>
<xs:sequence>
<xs:element name="Name" type="xs:string" />
<xs:element name="Members" type="pstd:Members" />
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
