API Guide > Viewport 2.0 API > Maya Viewport 2.0 API Guide > 6. XML Schema >

# 6.2 XML Schema for Fragment Graphs

The following is an XML schema which defines the XML format used for fragment graphs registered with MFragmentManager. This schema can be used to validate the XML for fragment graph definitions. Valid XML is necessary, but is not a sufficient condition for a fragment graph to function correctly in the Maya fragment shader system.

    <?xml version="1.0"?>
    <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">

     <xs:element name="fragment_graph">
      <xs:complexType>
       <xs:sequence>
        <xs:element name="description" type="xs:string" minOccurs="0" maxOccurs="1" />
        <xs:element name="keyword" type="KeywordType" minOccurs="0" maxOccurs="unbounded" />
        <xs:element name="fragments" type="FragmentListType" />
        <xs:element name="connections" type="ConnectionListType" />
        <xs:element name="properties" type="PropertiesListType" />
        <xs:element name="values" type="ValuesListType" />
        <xs:element name="outputs" type="OutputsListType" />
       </xs:sequence>
       <xs:attribute name="name" type="xs:string" use="required" />
       <xs:attribute name="ref" type="xs:string" use="required" />
       <xs:attribute name="class" type="xs:string" use="required" fixed="FragmentGraph" />
       <xs:attribute name="version" type="xs:float" use="required" />
       <xs:attribute name="feature_level" type="xs:integer" />
      </xs:complexType>
     </xs:element>

     <xs:complexType name="KeywordType">
      <xs:attribute name="value" type="xs:string" use="required" />
     </xs:complexType>

     <xs:complexType name="FragmentListType">
      <xs:choice minOccurs="0" maxOccurs="unbounded">
       <xs:element name="fragment_ref">
        <xs:complexType>
         <xs:attribute name="name" type="xs:string" use="required" />
         <xs:attribute name="ref" type="xs:string" use="required" />
        </xs:complexType>
       </xs:element>
      </xs:choice>
     </xs:complexType>

     <xs:complexType name="ConnectionListType">
      <xs:choice minOccurs="0" maxOccurs="unbounded">
       <xs:element name="connect">
        <xs:complexType>
         <xs:attribute name="from" type="xs:string" use="required" />
         <xs:attribute name="to" type="xs:string" use="required" />
        </xs:complexType>
       </xs:element>
      </xs:choice>
     </xs:complexType>

     <xs:complexType name="PropertiesListType">
      <xs:choice minOccurs="0" maxOccurs="unbounded">
       <xs:element name="float" type="PropertyType" />
       <xs:element name="float2" type="PropertyType" />
       <xs:element name="float3" type="PropertyType" />
       <xs:element name="float4" type="PropertyType" />
       <xs:element name="target" type="PropertyType" />
       <xs:element name="texture1" type="PropertyType" />
       <xs:element name="texture2" type="PropertyType" />
       <xs:element name="texture3" type="PropertyType" />
       <xs:element name="textureCube" type="PropertyType" />
       <xs:element name="world" type="PropertyType" />
       <xs:element name="bool" type="PropertyType" />
       <xs:element name="int" type="PropertyType" />
       <xs:element name="int2" type="PropertyType" />
       <xs:element name="int3" type="PropertyType" />
       <xs:element name="int4" type="PropertyType" />
       <xs:element name="color" type="PropertyType" />
       <xs:element name="colorAlpha" type="PropertyType" />
       <xs:element name="float4x4" type="PropertyType" />
       <xs:element name="string" type="PropertyType" />
       <xs:element name="stringArray" type="PropertyType" />
       <xs:element name="countedObject" type="PropertyType" />
       <xs:element name="object" type="PropertyType" />
       <xs:element name="struct" type="PropertyType" />
       <xs:element name="camera" type="PropertyType" />
       <xs:element name="effectInstance" type="PropertyType" />
       <xs:element name="effectInstanceArray" type="PropertyType" />
       <xs:element name="sampler" type="PropertyType" />
       <xs:element name="simpleMesh" type="PropertyType" />
       <xs:element name="pointStream" type="PropertyType" />
       <xs:element name="lineStream" type="PropertyType" />
       <xs:element name="triStream" type="PropertyType" />
       <xs:element name="undefined" type="PropertyType" />
       <xs:element name="renderer" type="PropertyType" />
       <xs:element name="enum" type="PropertyType" />
      </xs:choice>
     </xs:complexType>

     <xs:complexType name="PropertyType">
      <xs:attribute name="name" type="xs:string" use="required" />
      <xs:attribute name="ref" type="xs:string" use="required" />
      <xs:attribute name="semantic" type="xs:string" />
      <xs:attribute name="flags" type="xs:string" />
     </xs:complexType>

     <xs:complexType name="ValuesListType">
      <xs:choice minOccurs="0" maxOccurs="unbounded">
       <xs:element name="float" type="ValueType" />
       <xs:element name="float2" type="ValueType" />
       <xs:element name="float3" type="ValueType" />
       <xs:element name="float4" type="ValueType" />
       <xs:element name="color" type="ValueType" />
       <xs:element name="colorAlpha" type="ValueType" />
       <xs:element name="bool" type="ValueType" />
       <xs:element name="int" type="ValueType" />
       <xs:element name="int2" type="ValueType" />
       <xs:element name="int3" type="ValueType" />
       <xs:element name="int4" type="ValueType" />
       <xs:element name="float4x4" type="ValueType" />
       <xs:element name="string" type="ValueType" />
      </xs:choice>
     </xs:complexType>

     <xs:complexType name="ValueType">
      <xs:attribute name="name" type="xs:string" use="required" />
      <xs:attribute name="value" type="xs:string" use="required" />
     </xs:complexType>

     <xs:complexType name="OutputsListType">
      <xs:choice minOccurs="0" maxOccurs="unbounded">
       <xs:element name="float" type="OutputType" />
       <xs:element name="float2" type="OutputType" />
       <xs:element name="float3" type="OutputType" />
       <xs:element name="float4" type="OutputType" />
       <xs:element name="target" type="OutputType" />
       <xs:element name="texture1" type="OutputType" />
       <xs:element name="texture2" type="OutputType" />
       <xs:element name="texture3" type="OutputType" />
       <xs:element name="textureCube" type="OutputType" />
       <xs:element name="world" type="OutputType" />
       <xs:element name="bool" type="OutputType" />
       <xs:element name="int" type="OutputType" />
       <xs:element name="int2" type="OutputType" />
       <xs:element name="int3" type="OutputType" />
       <xs:element name="int4" type="OutputType" />
       <xs:element name="color" type="OutputType" />
       <xs:element name="colorAlpha" type="OutputType" />
       <xs:element name="float4x4" type="OutputType" />
       <xs:element name="string" type="OutputType" />
       <xs:element name="stringArray" type="OutputType" />
       <xs:element name="countedObject" type="OutputType" />
       <xs:element name="object" type="OutputType" />
       <xs:element name="struct" type="OutputType" />
       <xs:element name="camera" type="OutputType" />
       <xs:element name="effectInstance" type="OutputType" />
       <xs:element name="effectInstanceArray" type="OutputType" />
       <xs:element name="sampler" type="OutputType" />
       <xs:element name="simpleMesh" type="OutputType" />
       <xs:element name="pointStream" type="OutputType" />
       <xs:element name="lineStream" type="OutputType" />
       <xs:element name="triStream" type="OutputType" />
       <xs:element name="undefined" type="OutputType" />
       <xs:element name="renderer" type="OutputType" />
       <xs:element name="enum" type="OutputType" />
      </xs:choice>
     </xs:complexType>

     <xs:complexType name="OutputType">
      <xs:attribute name="name" type="xs:string" use="required" />
      <xs:attribute name="ref" type="xs:string" use="required" />
     </xs:complexType>

    </xs:schema>