* Example XML File
{{{
#!xml
<?xml version="1.0" standalone="yes"?>
<scroot:rootNode xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://vsl.cis.udel.edu/ns/tass/tass_ast
                              tass_ast.xsd"
          xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:scroot="http://vsl.cis.udel.edu/ns/tass/tass_ast">
  <id_RootNode>1</id_RootNode>
  <fdn_mainFunction>4</fdn_mainFunction>
  <globalScopeNodes>
    <id_GlobalScopeNodes>2</id_GlobalScopeNodes>
    <child>
      <id_FunctionDeclarationNode>4</id_FunctionDeclarationNode>
      <identifier>
        <id_IdentifierNode>5</id_IdentifierNode>
        <name>test</name>
      </identifier>
      <outputType>
        <id_TypeNode>6</id_TypeNode>
      </outputType>
      <formals>
        <id_FormalVariableDeclarationNodes>7</id_FormalVariableDeclarationNodes>
      </formals>
    </child>
  </globalScopeNodes>
  
</scroot:rootNode>
}}}

 * Schema
{{{
#!xml


<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/tass_ast"
           xmlns:tl="http://vsl.cis.udel.edu/ns/tass/tass_ast"
           xmlns:rtn="http://vsl.cis.udel.edu/ns/tass/RootNode"
           xmlns:astnode="http://vsl.cis.udel.edu/ns/tass/ASTNode"
           xmlns:tyn="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
           xmlns:fdn="http://vsl.cis.udel.edu/ns/tass/declaration/FunctionDeclarationNode"
           xmlns:ben="http://vsl.cis.udel.edu/ns/tass/statement/expression/BindingExpressionNode"
           xmlns:vdn="http://vsl.cis.udel.edu/ns/tass/declaration/VariableDeclarationNode"
           xmlns:vrn="http://vsl.cis.udel.edu/ns/tass/statement/expression/VariableReferenceNode"
           xmlns:ln="http://vsl.cis.udel.edu/ns/tass/LabelNode"
           xmlns:fvn="http://vsl.cis.udel.edu/ns/tass/declaration/FormalVariableDeclarationNode"
           xmlns:stn="http://vsl.cis.udel.edu/ns/tass/statement/StatementNode"
           xmlns:fin="http://vsl.cis.udel.edu/ns/tass/statement/expression/FunctionInvocationNode"
           xmlns:frn="http://vsl.cis.udel.edu/ns/tass/statement/expression/FunctionReferenceNode"
           xmlns:asrn="http://vsl.cis.udel.edu/ns/tass/statement/AssertStatementNode"
           xmlns:on="http://vsl.cis.udel.edu/ns/tass/statement/expression/OperatorNode"
           xmlns:btn="http://vsl.cis.udel.edu/ns/tass/type/BooleanTypeNode"
           xmlns:file="http://vsl.cis.udel.edu/ns/tass/File"
           xmlns:misc="http://vsl.cis.udel.edu/ns/tass/misc"
           xmlns:gvdn="http://vsl.cis.udel.edu/ns/tass/declaration/GlobalVariableDeclarationNode"
           xmlns:lvdn="http://vsl.cis.udel.edu/ns/tass/declaration/LocalVariableDeclarationNode"
           xmlns:bln="http://vsl.cis.udel.edu/ns/tass/statement/BlockNode"
           xmlns:bvn="http://vsl.cis.udel.edu/ns/tass/declaration/BoundVariableDeclarationNode"
           xmlns:trn="http://vsl.cis.udel.edu/ns/tass/type/TypeReferenceNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/RootNode"
             schemaLocation="RootNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/ASTNode"
             schemaLocation="ASTNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/BindingExpressionNode"
             schemaLocation="statement/expression/BindingExpressionNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/RealLiteralNode"
             schemaLocation="statement/expression/RealLiteralNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/type/IntegerTypeNode"
             schemaLocation="type/IntegerTypeNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/type/VoidTypeNode"
            schemaLocation="type/VoidTypeNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/AssignmentNode"
             schemaLocation="statement/expression/AssignmentNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/ReturnNode"
             schemaLocation="statement/ReturnNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/IntegerLiteralNode"
             schemaLocation="statement/expression/IntegerLiteralNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/type/PointerTypeNode"
             schemaLocation="type/PointerTypeNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/FunctionInvocationNode"
             schemaLocation="statement/expression/FunctionInvocationNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/FunctionReferenceNode"
             schemaLocation="statement/expression/FunctionReferenceNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/AssertStatementNode"
             schemaLocation="statement/AssertStatementNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/OperatorNode"
             schemaLocation="statement/expression/OperatorNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/type/BooleanTypeNode"
             schemaLocation="type/BooleanTypeNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/File"
             schemaLocation="File.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/misc"
             schemaLocation="misc.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/declaration/GlobalVariableDeclarationNode"
             schemaLocation="declaration/GlobalVariableDeclarationNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/declaration/LocalVariableDeclarationNode"
             schemaLocation="declaration/LocalVariableDeclarationNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/BlockNode"
             schemaLocation="statement/BlockNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/declaration/BoundVariableDeclarationNode"
             schemaLocation="declaration/BoundVariableDeclarationNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/type/TypeReferenceNode"
             schemaLocation="type/TypeReferenceNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
             schemaLocation="type/TypeNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/SubscriptNode"
             schemaLocation="statement/expression/SubscriptNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/ForLoopNode"
             schemaLocation="statement/ForLoopNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/IncrementNode"
             schemaLocation="statement/expression/IncrementNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/IncrementNode"
             schemaLocation="statement/expression/IncrementNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/type/RealTypeNode"
             schemaLocation="type/RealTypeNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/PragmaNode"
             schemaLocation="statement/PragmaNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/type/ArrayTypeNode"
             schemaLocation="type/ArrayTypeNode.xsd" />

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/type/CompositeTypeNode"
             schemaLocation="type/CompositeTypeNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/TypeDefinitionNode"
             schemaLocation="TypeDefinitionNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/IfThenElseStatementNode"
             schemaLocation="statement/IfThenElseStatementNode.xsd" />


  <xs:element name="rootNode" type="rtn:RootNode">

    <xs:unique name="uniqueStatementIds">
      <xs:selector xpath=".//stn:id" />
      <xs:field xpath="." />
    </xs:unique>

    <xs:keyref name="strefs"
               refer="tl:uniqueStatementIds">
      <xs:selector xpath=".//ln:stref" />
      <xs:field xpath="." />
    </xs:keyref>

    <xs:unique name="uniqueFunctionRefs">
      <xs:selector xpath=".//fdn:id" />
      <xs:field xpath="." />
    </xs:unique>

    <xs:keyref name="frefs"
               refer="tl:uniqueFunctionRefs">
      <xs:selector xpath=".//fvn:fref" />
      <xs:field xpath="." />
    </xs:keyref>

    <xs:keyref name="rrefs"
               refer="tl:uniqueFunctionRefs">
      <xs:selector xpath=".//frn:rref" />
      <xs:field xpath="." />
    </xs:keyref>

    <xs:keyref name="rtnFunctionRefs"
               refer="tl:uniqueFunctionRefs">
      <xs:selector xpath=".//rtn:mainFunction" />
      <xs:field xpath="." />
    </xs:keyref>

    <xs:unique name="uniqueVariableRefs">
      <xs:selector xpath=".//vdn:id" />
      <xs:field xpath="." />
    </xs:unique>

    <!--
        Commented out until issues regarding MI in
        GlobalVariableDeclarationNodes are resolved
    <xs:keyref name="vrefs"
               refer="tl:uniqueVariableRefs">
      <xs:selector xpath=".//vrn:vref" />
      <xs:field xpath="." />
    </xs:keyref> -->

    <xs:keyref name="gVariableRefs"
               refer="tl:uniqueVariableRefs">
      <xs:selector xpath=".//gvdn:dref" />
      <xs:field xpath="." />
    </xs:keyref>

    <xs:unique name="uniqueFileRefs">
      <xs:selector xpath=".//file:id" />
      <xs:field xpath="." />
    </xs:unique>

    <xs:keyref name="fileRefs"
               refer="tl:uniqueFileRefs">
      <xs:selector xpath=".//astnode:source" />
      <xs:field xpath="@fileRef" />
    </xs:keyref>

    <xs:unique name="uniqueBlockRefs">
      <xs:selector xpath=".//bln:id" />
      <xs:field xpath="." />
    </xs:unique>

    <xs:keyref name="brefs"
               refer="tl:uniqueBlockRefs">
      <xs:selector xpath=".//lvdn:bref" />
      <xs:field xpath="." />
    </xs:keyref>

    <xs:unique name="uniqueBindingExpressionRefs">
      <xs:selector xpath=".//ben:ubeid" />
      <xs:field xpath="." />
    </xs:unique>

    <xs:keyref name="bindingExpressionrefs"
               refer="tl:uniqueBindingExpressionRefs">
      <xs:selector xpath=".//bvn:beref" />
      <xs:field xpath="." />
    </xs:keyref>

    <xs:unique name="uniqueTypeIds">
      <xs:selector xpath=".//tyn:id" />
      <xs:field xpath="." />
    </xs:unique>

    <xs:keyref name="uniqueTypeRefs"
               refer="tl:uniqueTypeIds">
      <xs:selector xpath=".//trn:typeRef" />
      <xs:field xpath="." />
    </xs:keyref>

  </xs:element>

</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/ASTNode"
           xmlns:astnode="http://vsl.cis.udel.edu/ns/tass/ASTNode"
           xmlns:misc="http://vsl.cis.udel.edu/ns/tass/misc"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/misc"
             schemaLocation="misc.xsd" />
  
  <xs:complexType name="ASTNode">
    <xs:sequence>
      <xs:element name="source"
                  type="misc:Source"
                  minOccurs="0"
                  maxOccurs="1" />
    </xs:sequence>
  </xs:complexType>
  
</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/TypeDefinitionNode"
           xmlns:gsn="http://vsl.cis.udel.edu/ns/tass/GlobalScopeNode"
           xmlns:idn="http://vsl.cis.udel.edu/ns/tass/IdentifierNode"
           xmlns:tyn="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/GlobalScopeNode"
             schemaLocation="GlobalScopeNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/IdentifierNode"
             schemaLocation="IdentifierNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
             schemaLocation="type/TypeNode.xsd" />

  <xs:complexType name="TypeDefinitionNode">
    <xs:complexContent>
      <xs:extension base="gsn:GlobalScopeNode">
        <xs:sequence>
          <xs:element name="identifier"
                      type="idn:IdentifierNode" />
          <xs:element name="type"
                      type="tyn:TypeNode" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/type/CompositeTypeNode"
           xmlns:ctn="http://vsl.cis.udel.edu/ns/tass/type/CompositeTypeNode"
           xmlns:idn="http://vsl.cis.udel.edu/ns/tass/IdentifierNode"
           xmlns:tn="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
           xmlns:astnode="http://vsl.cis.udel.edu/ns/tass/ASTNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/ASTNode"
             schemaLocation="../ASTNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
             schemaLocation="TypeNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/IdentifierNode"
             schemaLocation="../IdentifierNode.xsd" />

  <xs:complexType name="CompositeTypeNode">
    <xs:complexContent>
      <xs:extension base="tn:TypeNode">
        <xs:sequence>
          <xs:element name="name"
                      type="idn:IdentifierNode" />
          <xs:element name="fields"
                      type="ctn:Fields" />
          <xs:element name="isUnion"
                      minOccurs="0"
                      type="xs:boolean"
                      default="false" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

  <xs:complexType name="Fields">
    <xs:complexContent>
      <xs:extension base="astnode:ASTNode">
        <xs:sequence>
          <xs:element name="child"
                      type="ctn:Field"
                      minOccurs="0"
                      maxOccurs="unbounded" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

  <xs:complexType name="Field">
    <xs:complexContent>
      <xs:extension base="astnode:ASTNode">
        <xs:sequence>
          <xs:element name="left"
                      type="idn:IdentifierNode" />
          <xs:element name="right"
                      type="tn:TypeNode" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

</xs:schema>


<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/type/IntegerTypeNode"
           xmlns:itn="http://vsl.cis.udel.edu/ns/tass/type/IntegerTypeNode"
           xmlns:tn="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
             schemaLocation="TypeNode.xsd" />

  <xs:simpleType name="IntType">
    <xs:restriction base="xs:string">
      <xs:enumeration value="CHAR" />
      <xs:enumeration value="SHORT" />
      <xs:enumeration value="INT" />
      <xs:enumeration value="LONG" />
      <xs:enumeration value="LONGLONG" />
    </xs:restriction>
  </xs:simpleType>

  <xs:complexType name="IntegerTypeNode">
    <xs:complexContent>
      <xs:extension base="tn:TypeNode">
        <xs:attribute name="intType" type="itn:IntType" default="INT" />
        <xs:attribute name="isSigned" type="xs:boolean" default="true" />
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
           xmlns:szn="http://vsl.cis.udel.edu/ns/tass/SizeableNode"
           xmlns:misc="http://vsl.cis.udel.edu/ns/tass/misc"
           xmlns:tyn="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/SizeableNode"
             schemaLocation="../SizeableNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/misc"
             schemaLocation="../misc.xsd" />

  <xs:complexType name="TypeNode">
    <xs:complexContent>
      <xs:extension base="szn:SizeableNode">
        <xs:sequence>
          <xs:element name="id"
                      type="misc:Guid"
                      minOccurs="0"
                      maxOccurs="1" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/type/PointerTypeNode"
           xmlns:ptn="http://vsl.cis.udel.edu/ns/tass/type/PointerTypeNode"
           xmlns:tn="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
             schemaLocation="TypeNode.xsd" />

  <xs:complexType name="PointerTypeNode">
    <xs:complexContent>
      <xs:extension base="tn:TypeNode">
        <xs:sequence>
          <xs:element name="baseType" type="tn:TypeNode" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/type/TypeReferenceNode"
           xmlns:astnode="http://vsl.cis.udel.edu/ns/tass/ASTNode"
           xmlns:idn="http://vsl.cis.udel.edu/ns/tass/IdentifierNode"
           xmlns:trn="http://vsl.cis.udel.edu/ns/tass/type/TypeReferenceNode"
           xmlns:misc="http://vsl.cis.udel.edu/ns/tass/misc"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/IdentifierNode"
             schemaLocation="../IdentifierNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/misc"
             schemaLocation="../misc.xsd" />

  <xs:complexType name="TypeReferenceNode">
    <xs:complexContent>
      <xs:extension base="idn:IdentifierNode">
        <xs:attribute name="typeRef" type="misc:Guid" />
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/type/VoidTypeNode"
           xmlns:vtn="http://vsl.cis.udel.edu/ns/tass/type/VoidTypeNode"
           xmlns:tn="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
             schemaLocation="TypeNode.xsd" />

  <xs:complexType name="VoidTypeNode">
    <xs:complexContent>
      <xs:extension base="tn:TypeNode" />
    </xs:complexContent>
  </xs:complexType>
</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/type/ArrayTypeNode"
           xmlns:atn="http://vsl.cis.udel.edu/ns/tass/type/ArrayTypeNode"
           xmlns:tn="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
           xmlns:en="http://vsl.cis.udel.edu/ns/tass/statement/expression/ExpressionNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
             schemaLocation="TypeNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/ExpressionNode"
             schemaLocation="../statement/expression/ExpressionNode.xsd" />


  <xs:complexType name="ArrayTypeNode">
    <xs:complexContent>
      <xs:extension base="tn:TypeNode">
        <xs:sequence>
          <xs:element name="elementType"
                      type="tn:TypeNode" />
          <xs:element name="extent"
                      type="en:ExpressionNode"
                      minOccurs="0" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/type/BooleanTypeNode"
           xmlns:btn="http://vsl.cis.udel.edu/ns/tass/type/BooleanTypeNode"
           xmlns:tn="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
             schemaLocation="TypeNode.xsd" />

  <xs:complexType name="BooleanTypeNode">
    <xs:complexContent>
      <xs:extension base="tn:TypeNode" />
    </xs:complexContent>
  </xs:complexType>
</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/type/RealTypeNode"
           xmlns:rtn="http://vsl.cis.udel.edu/ns/tass/type/RealTypeNode"
           xmlns:tn="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
             schemaLocation="TypeNode.xsd" />

  <xs:simpleType name="FloatType">
    <xs:restriction base="xs:string">
      <xs:enumeration value="FLOAT" />
      <xs:enumeration value="DOUBLE" />
      <xs:enumeration value="LONG" />
    </xs:restriction>
  </xs:simpleType>


  <xs:complexType name="RealTypeNode">
    <xs:complexContent>
      <xs:extension base="tn:TypeNode">
        <xs:attribute name="floatType" type="rtn:FloatType" default="DOUBLE" />
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/GlobalScopeNode"
           xmlns:astnode="http://vsl.cis.udel.edu/ns/tass/ASTNode"
           xmlns:gsn="http://vsl.cis.udel.edu/ns/tass/GlobalScopeNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/ASTNode"
             schemaLocation="ASTNode.xsd" />

  <xs:complexType name="GlobalScopeNode" abstract="true">
    <xs:complexContent>
      <xs:extension base="astnode:ASTNode" />
    </xs:complexContent>
  </xs:complexType>

  <xs:complexType name="GlobalScopeNodes">
    <xs:complexContent>
      <xs:extension base="astnode:ASTNode">
        <xs:sequence>
          <xs:element name="child"
                      type="gsn:GlobalScopeNode"
                      minOccurs="0"
                      maxOccurs="unbounded" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/LabelNode"
           xmlns:ln="http://vsl.cis.udel.edu/ns/tass/LabelNode"
           xmlns:astnode="http://vsl.cis.udel.edu/ns/tass/ASTNode"
           xmlns:idn="http://vsl.cis.udel.edu/ns/tass/IdentifierNode"
           xmlns:misc="http://vsl.cis.udel.edu/ns/tass/misc"
           elementFormDefault="qualified">
           
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/ASTNode"
             schemaLocation="ASTNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/IdentifierNode"
             schemaLocation="IdentifierNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/misc"
             schemaLocation="misc.xsd" />

  <xs:complexType name="LabelNode">
    <xs:complexContent>
      <xs:extension base="astnode:ASTNode">
        <xs:sequence>
          <xs:element name="identifier"
                      type="idn:IdentifierNode" />
          <xs:element name="stref"
                      type="misc:Guid" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

  <xs:complexType name="LabelNodes">
    <xs:complexContent>
      <xs:extension base="astnode:ASTNode">
        <xs:sequence>
          <xs:element name="child"
                      type="ln:LabelNode" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
</xs:schema>


<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/declaration/FormalVariableDeclarationNode"
           xmlns:fvn="http://vsl.cis.udel.edu/ns/tass/declaration/FormalVariableDeclarationNode"
           xmlns:vdn="http://vsl.cis.udel.edu/ns/tass/declaration/VariableDeclarationNode"
           xmlns:misc="http://vsl.cis.udel.edu/ns/tass/misc"
           xmlns:astnode="http://vsl.cis.udel.edu/ns/tass/ASTNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/declaration/VariableDeclarationNode"
             schemaLocation="VariableDeclarationNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/misc"
             schemaLocation="../misc.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/ASTNode"
             schemaLocation="../ASTNode.xsd" />

  <xs:complexType name="FormalVariableDeclarationNode">
    <xs:complexContent>
      <xs:extension base="vdn:VariableDeclarationNode">
        <xs:sequence>
          <xs:element name="fref"
                      type="misc:Guid" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

  <xs:complexType name="FormalVariableDeclarationNodes">
    <xs:complexContent>
      <xs:extension base="astnode:ASTNode">
        <xs:sequence>
          <xs:element name="child"
                      type="fvn:FormalVariableDeclarationNode"
                      minOccurs="0"
                      maxOccurs="unbounded" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/declaration/GlobalVariableDeclarationNode"
           xmlns:gsn="http://vsl.cis.udel.edu/ns/tass/GlobalScopeNode"
           xmlns:vdn="http://vsl.cis.udel.edu/ns/tass/declaration/VariableDeclarationNode"
           xmlns:gvdn="http://vsl.cis.udel.edu/ns/tass/declaration/GlobalVariableDeclarationNode"
           xmlns:astnode="http://vsl.cis.udel.edu/ns/tass/ASTNode"
           xmlns:idn="http://vsl.cis.udel.edu/ns/tass/IdentifierNode"
           xmlns:tyn="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
           xmlns:exn="http://vsl.cis.udel.edu/ns/tass/statement/expression/ExpressionNode"
           xmlns:misc="http://vsl.cis.udel.edu/ns/tass/misc"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/ASTNode"
             schemaLocation="../ASTNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/IdentifierNode"
             schemaLocation="../IdentifierNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/ExpressionNode"
             schemaLocation="../statement/expression/ExpressionNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
             schemaLocation="../type/TypeNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/misc"
             schemaLocation="../misc.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/declaration/VariableDeclarationNode"
             schemaLocation="VariableDeclarationNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/GlobalScopeNode"
             schemaLocation="../GlobalScopeNode.xsd" />

  <xs:complexType name="GlobalVariableDeclarationNode">
    <xs:complexContent>
      <xs:extension base="gsn:GlobalScopeNode">
        <xs:sequence>
          <xs:element name="id"
                      type="misc:Guid"
                      minOccurs="0" />
          <xs:element name="name"
                      type="idn:IdentifierNode" />
          <xs:element name="type"
                      type="tyn:TypeNode" />
          <xs:element name="initializer"
                      type="exn:ExpressionNode"
                      minOccurs="0"
                      maxOccurs="1" />
          <xs:element name="isConst"
                      minOccurs="0" />
          <xs:element name="isVolatile"
                      minOccurs="0" />
          <xs:element name="isRestict"
                      minOccurs="0" />
          <xs:element name="storageClass"
                      type="vdn:StorageClass"
                      minOccurs="0"
                      maxOccurs="1" />
          <xs:element name="dref"
                      type="misc:Guid"
                      minOccurs="0" />
          <xs:element name="isDefinition"
                      minOccurs="0" />
          <xs:element name="isInput"
                      minOccurs="0" />
          <xs:element name="isOutput"
                      minOccurs="0" />
          <xs:element name="isShared"
                      minOccurs="0" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

  <xs:complexType name="GlobalVariableDeclarationNodes">
    <xs:complexContent>
      <xs:extension base="astnode:ASTNode">
        <xs:sequence>
          <xs:element name="child"
                      type="gvdn:GlobalVariableDeclarationNode"
                      minOccurs="0"
                      maxOccurs="unbounded" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/declaration/VariableDeclarationNode"
           xmlns:vdn="http://vsl.cis.udel.edu/ns/tass/declaration/VariableDeclarationNode"
           xmlns:astnode="http://vsl.cis.udel.edu/ns/tass/ASTNode"
           xmlns:idn="http://vsl.cis.udel.edu/ns/tass/IdentifierNode"
           xmlns:tyn="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
           xmlns:exn="http://vsl.cis.udel.edu/ns/tass/statement/expression/ExpressionNode"
           xmlns:misc="http://vsl.cis.udel.edu/ns/tass/misc"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/ASTNode"
             schemaLocation="../ASTNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/IdentifierNode"
             schemaLocation="../IdentifierNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/ExpressionNode"
             schemaLocation="../statement/expression/ExpressionNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
             schemaLocation="../type/TypeNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/misc"
             schemaLocation="../misc.xsd" />

  <xs:simpleType name="StorageClass">
    <xs:restriction base="xs:string">
      <xs:enumeration value="EXTERNAL" />
      <xs:enumeration value="AUTO" />
      <xs:enumeration value="STATIC" />
      <xs:enumeration value="REGISTER" />
    </xs:restriction>
  </xs:simpleType>

  <xs:complexType name="VariableDeclarationNode" abstract="true">
    <xs:complexContent>
      <xs:extension base="astnode:ASTNode">
        <xs:sequence>
          <xs:element name="id"
                      type="misc:Guid"
                      minOccurs="0" />
          <xs:element name="name"
                      type="idn:IdentifierNode" />
          <xs:element name="type"
                      type="tyn:TypeNode" />
          <xs:element name="initializer"
                      type="exn:ExpressionNode"
                      minOccurs="0"
                      maxOccurs="1" />
          <xs:element name="isConst"
                      minOccurs="0" />
          <xs:element name="isVolatile"
                      minOccurs="0" />
          <xs:element name="isRestict"
                      minOccurs="0" />
          <xs:element name="storageClass"
                      type="vdn:StorageClass"
                      minOccurs="0" 
                      maxOccurs="1" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

  <xs:complexType name="VariableDeclarationNodes">
    <xs:complexContent>
      <xs:extension base="astnode:ASTNode">
        <xs:sequence>
          <xs:element name="child"
                      type="vdn:VariableDeclarationNode"
                      minOccurs="0"
                      maxOccurs="unbounded" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/declaration/BoundVariableDeclarationNode"
           xmlns:bvn="http://vsl.cis.udel.edu/ns/tass/declaration/BoundVariableDeclarationNode"
           xmlns:vdn="http://vsl.cis.udel.edu/ns/tass/declaration/VariableDeclarationNode"
           xmlns:misc="http://vsl.cis.udel.edu/ns/tass/misc"
           xmlns:astnode="http://vsl.cis.udel.edu/ns/tass/ASTNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/declaration/VariableDeclarationNode"
             schemaLocation="VariableDeclarationNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/misc"
             schemaLocation="../misc.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/ASTNode"
             schemaLocation="../ASTNode.xsd" />

  <xs:complexType name="BoundVariableDeclarationNode">
    <xs:complexContent>
      <xs:extension base="vdn:VariableDeclarationNode">
        <xs:sequence>
          <xs:element name="beref"
                      type="misc:Guid" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

  <xs:complexType name="BoundVariableDeclarationNodes">
    <xs:complexContent>
      <xs:extension base="astnode:ASTNode">
        <xs:sequence>
          <xs:element name="child"
                      type="bvn:BoundVariableDeclarationNode"
                      minOccurs="0"
                      maxOccurs="unbounded" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/declaration/FunctionDeclarationNode"
           xmlns:fdn="http://vsl.cis.udel.edu/ns/tass/declaration/FunctionDeclarationNode"
           xmlns:gsn="http://vsl.cis.udel.edu/ns/tass/GlobalScopeNode"
           xmlns:idn="http://vsl.cis.udel.edu/ns/tass/IdentifierNode"
           xmlns:tyn="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
           xmlns:fvn="http://vsl.cis.udel.edu/ns/tass/declaration/FormalVariableDeclarationNode"
           xmlns:bln="http://vsl.cis.udel.edu/ns/tass/statement/BlockNode"
           xmlns:misc="http://vsl.cis.udel.edu/ns/tass/misc"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/GlobalScopeNode"
             schemaLocation="../GlobalScopeNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/IdentifierNode"
             schemaLocation="../IdentifierNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/BlockNode"
             schemaLocation="../statement/BlockNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
             schemaLocation="../type/TypeNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/declaration/FormalVariableDeclarationNode"
             schemaLocation="FormalVariableDeclarationNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/misc"
             schemaLocation="../misc.xsd" />
  
  <xs:complexType name="FunctionDeclarationNode">
    <xs:complexContent>
      <xs:extension base="gsn:GlobalScopeNode">
        <xs:sequence>
          <xs:element name="id"
                      type="misc:Guid"
                      minOccurs="0" />
          <xs:element name="name"
                      type="idn:IdentifierNode" />
          <xs:element name="outputType"
                      type="tyn:TypeNode" />
          <xs:element name="formals"
                      type="fvn:FormalVariableDeclarationNodes" />
          <xs:choice minOccurs="0">
            <xs:element name="fref"
                        type="misc:Guid" />
            <xs:element name="body"
                        type="bln:BlockNode" />
          </xs:choice>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/declaration/LocalVariableDeclarationNode"
           xmlns:vdn="http://vsl.cis.udel.edu/ns/tass/declaration/VariableDeclarationNode"
           xmlns:lvdn="http://vsl.cis.udel.edu/ns/tass/declaration/LocalVariableDeclarationNode"
           xmlns:astnode="http://vsl.cis.udel.edu/ns/tass/ASTNode"
           xmlns:idn="http://vsl.cis.udel.edu/ns/tass/IdentifierNode"
           xmlns:tyn="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
           xmlns:exn="http://vsl.cis.udel.edu/ns/tass/statement/expression/ExpressionNode"
           xmlns:misc="http://vsl.cis.udel.edu/ns/tass/misc"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/ASTNode"
             schemaLocation="../ASTNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/IdentifierNode"
             schemaLocation="../IdentifierNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/ExpressionNode"
             schemaLocation="../statement/expression/ExpressionNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
             schemaLocation="../type/TypeNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/misc"
             schemaLocation="../misc.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/declaration/VariableDeclarationNode"
             schemaLocation="VariableDeclarationNode.xsd" />

  <xs:complexType name="LocalVariableDeclarationNode">
    <xs:complexContent>
      <xs:extension base="vdn:VariableDeclarationNode">
        <xs:sequence>
          <xs:element name="bref"
                      type="misc:Guid" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

  <xs:complexType name="LocalVariableDeclarationNodes">
    <xs:complexContent>
      <xs:extension base="astnode:ASTNode">
        <xs:sequence>
          <xs:element name="child"
                      type="lvdn:LocalVariableDeclarationNode"
                      minOccurs="0"
                      maxOccurs="unbounded" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/SizeableNode"
           xmlns:astnode="http://vsl.cis.udel.edu/ns/tass/ASTNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/ASTNode"
             schemaLocation="ASTNode.xsd" />

  <xs:complexType name="SizeableNode">
    <xs:complexContent>
      <xs:extension base="astnode:ASTNode" />
    </xs:complexContent>
  </xs:complexType>
</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/misc"
           xmlns:misc="http://vsl.cis.udel.edu/ns/tass/misc"
           elementFormDefault="qualified">

  <xs:simpleType name="Guid">
    <xs:restriction base="xs:integer" />
  </xs:simpleType>

  <xs:complexType name="Source">
    <xs:attribute name="region" type="misc:SourceRegion" use="required" />
    <xs:attribute name="fileRef" type="misc:Guid" use="required" />
  </xs:complexType>

  <xs:simpleType name="SourceRegion">
    <xs:restriction base="xs:string">
      <xs:annotation>
        <xs:documentation xml:lang="en-US">
          This type represents a region of source file and is to be
          parsed as the following:
          [startLine],[startColumn],[endLine],[endColumn]
          It is assumed that: endLine &gt;= startLine
          and if endLine == startLine that endColumn &gt; startColumn
        </xs:documentation>
      </xs:annotation>
      <xs:pattern value="\d+,\d+,\d+,\d+" />
    </xs:restriction>
  </xs:simpleType>
  
</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/IdentifierNode"
           xmlns:astnode="http://vsl.cis.udel.edu/ns/tass/ASTNode"
           xmlns:idn="http://vsl.cis.udel.edu/ns/tass/IdentifierNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/ASTNode"
             schemaLocation="ASTNode.xsd" />

  <xs:complexType name="IdentifierNode">
    <xs:complexContent>
      <xs:extension base="astnode:ASTNode">
        <xs:attribute name="identifier" type="xs:string" />
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           xmlns:file="http://vsl.cis.udel.edu/ns/tass/File"
           xmlns:sqn="http://vsl.cis.udel.edu/ns/tass/SequenceNode"
           xmlns:misc="http://vsl.cis.udel.edu/ns/tass/misc"
           xmlns:astnode="http://vsl.cis.udel.edu/ns/tass/ASTNode"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/File"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/ASTNode"
             schemaLocation="ASTNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/misc"
             schemaLocation="misc.xsd" />
  
  <xs:complexType name="File">
      <xs:sequence>
        <xs:element name="id"
                    type="misc:Guid" />
        <xs:element name="fileName"
                    type="xs:string" />
        <xs:element name="contents"
                    type="xs:string"
                    minOccurs="0" />
      </xs:sequence>
      <xs:attribute name="isSystem"
                    type="xs:boolean"
                    default="false" />
  </xs:complexType>

  <xs:complexType name="Files">
    <xs:complexContent>
      <xs:extension base="astnode:ASTNode">
        <xs:sequence>
          <xs:element name="child"
                      type="file:File"
                      minOccurs="1"
                      maxOccurs="unbounded" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/RootNode"
           xmlns:gsn="http://vsl.cis.udel.edu/ns/tass/GlobalScopeNode"
           xmlns:fdn="http://vsl.cis.udel.edu/ns/tass/declaration/FunctionDeclarationNode"
           xmlns:rtn="http://vsl.cis.udel.edu/ns/tass/RootNode"
           xmlns:file="http://vsl.cis.udel.edu/ns/tass/File"
           xmlns:misc="http://vsl.cis.udel.edu/ns/tass/misc"
           xmlns:astnode="http://vsl.cis.udel.edu/ns/tass/ASTNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/GlobalScopeNode"
             schemaLocation="GlobalScopeNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/declaration/FunctionDeclarationNode"
             schemaLocation="declaration/FunctionDeclarationNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/File"
             schemaLocation="File.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/ASTNode"
             schemaLocation="ASTNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/misc"
             schemaLocation="misc.xsd" />

  <xs:complexType name="RootNode">
    <xs:complexContent>
      <xs:extension base="astnode:ASTNode">
        <xs:sequence>
          <xs:element name="globalScopeNodes"
                      type="gsn:GlobalScopeNodes" />
          <xs:element name="mainFunction"
                      type="misc:Guid"
                      minOccurs="0"
                      maxOccurs="1" />
          <xs:element name="files"
                      type="file:Files" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/statement/IfThenElseStatementNode"
           xmlns:ite="http://vsl.cis.udel.edu/ns/tass/statement/IfThenElseStatementNode"
           xmlns:stn="http://vsl.cis.udel.edu/ns/tass/statement/StatementNode"
           xmlns:exn="http://vsl.cis.udel.edu/ns/tass/statement/expression/ExpressionNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/StatementNode"
             schemaLocation="StatementNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/ExpressionNode"
             schemaLocation="expression/ExpressionNode.xsd" />

  <xs:complexType name="IfThenElseStatementNode">
    <xs:complexContent>
      <xs:extension base="stn:StatementNode">
        <xs:sequence>
          <xs:element name="condition"
                      type="exn:ExpressionNode" />
          <xs:element name="trueBranch"
                      type="stn:StatementNode" />
          <xs:element name="falseBranch"
                      type="stn:StatementNode"
                      minOccurs="0" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/statement/ReturnNode"
           xmlns:stn="http://vsl.cis.udel.edu/ns/tass/statement/StatementNode"
           xmlns:en="http://vsl.cis.udel.edu/ns/tass/statement/expression/ExpressionNode"
           xmlns:rn="http://vsl.cis.udel.edu/ns/tass/statement/ReturnNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/StatementNode"
             schemaLocation="StatementNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/ExpressionNode"
             schemaLocation="expression/ExpressionNode.xsd" />

  <xs:complexType name="ReturnNode">
    <xs:complexContent>
      <xs:extension base="stn:StatementNode">
        <xs:sequence>
          <xs:element name="expression"
                      type="en:ExpressionNode" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/statement/ForLoopNode"
           xmlns:fln="http://vsl.cis.udel.edu/ns/tass/statement/ForLoopNode"
           xmlns:exn="http://vsl.cis.udel.edu/ns/tass/statement/expression/ExpressionNode"
           xmlns:stn="http://vsl.cis.udel.edu/ns/tass/statement/StatementNode"
           xmlns:ln="http://vsl.cis.udel.edu/ns/tass/statement/LoopNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/LoopNode"
             schemaLocation="LoopNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/StatementNode"
             schemaLocation="StatementNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/ExpressionNode"
             schemaLocation="expression/ExpressionNode.xsd" />

  <xs:complexType name="ForLoopNode">
    <xs:complexContent>
      <xs:extension base="ln:LoopNode">
        <xs:sequence>
          <xs:element name="initializer"
                      type="stn:StatementNode" />
          <xs:element name="condition"
                      type="exn:ExpressionNode" />
          <xs:element name="incrementer"
                      type="stn:StatementNode" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/statement/PragmaNode"
           xmlns:pn="http://vsl.cis.udel.edu/ns/tass/statement/PragmaNode"
           xmlns:astnode="http://vsl.cis.udel.edu/ns/tass/ASTNode"
           xmlns:gsn="http://vsl.cis.udel.edu/ns/tass/GlobalScopeNode"
           xmlns:stn="http://vsl.cis.udel.edu/ns/tass/statement/StatementNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/StatementNode"
             schemaLocation="StatementNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/GlobalScopeNode"
             schemaLocation="../GlobalScopeNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/ASTNode"
             schemaLocation="../ASTNode.xsd" />

  <xs:complexType name="PragmaNode">
    <xs:complexContent>
      <xs:extension base="stn:StatementNode">
        <xs:sequence>
          <xs:element name="string"
                      type="xs:string" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

  <xs:complexType name="GlobalPragmaNode">
    <xs:complexContent>
      <xs:extension base="gsn:GlobalScopeNode">
        <xs:sequence>
          <xs:element name="pragmaNode"
                      type="pn:PragmaNode" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

  <xs:complexType name="PragmaNodes">
    <xs:complexContent>
      <xs:extension base="astnode:ASTNode">
        <xs:sequence>
          <xs:element name="child"
                      type="pn:PragmaNode"
                      minOccurs="0"
                      maxOccurs="unbounded" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/LHSExpressionNode"
           xmlns:lhsn="http://vsl.cis.udel.edu/ns/tass/statement/expression/LHSExpressionNode"
           xmlns:pen="http://vsl.cis.udel.edu/ns/tass/statement/expression/PureExpressionNode"
           xmlns:astnode="http://vsl.cis.udel.edu/ns/tass/ASTNode"
           xmlns:vrn="http://vsl.cis.udel.edu/ns/tass/statement/expression/VariableReferenceNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/PureExpressionNode"
             schemaLocation="PureExpressionNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/ASTNode"
             schemaLocation="../../ASTNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/VariableReferenceNode"
             schemaLocation="VariableReferenceNode.xsd" />

  <xs:complexType name="LHSExpressionNode">
    <xs:complexContent>
      <xs:extension base="pen:PureExpressionNode" />
    </xs:complexContent>
  </xs:complexType>

  <xs:complexType name="LHSExpressionNodes">
    <xs:complexContent>
      <xs:extension base="astnode:ASTNode">
        <xs:sequence>
          <xs:element name="child"
                      type="lhsn:LHSExpressionNode"
                      minOccurs="0"
                      maxOccurs="unbounded" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/AssignmentNode"
           xmlns:asn="http://vsl.cis.udel.edu/ns/tass/statement/expression/AssignmentNode"
           xmlns:mdn="http://vsl.cis.udel.edu/ns/tass/statement/expression/ModificationNode"
           xmlns:exn="http://vsl.cis.udel.edu/ns/tass/statement/expression/ExpressionNode"
           xmlns:astnode="http://vsl.cis.udel.edu/ns/tass/ASTNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/ModificationNode"
             schemaLocation="ModificationNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/ExpressionNode"
             schemaLocation="ExpressionNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/ASTNode"
             schemaLocation="../../ASTNode.xsd" />

  <xs:simpleType name="AST_ASSIGNMENT_TYPE">
    <xs:restriction base="xs:string">
      <xs:whiteSpace value="collapse" />
      <xs:enumeration value="SIMPLE" />
      <xs:enumeration value="MULTIPLICATION" />
      <xs:enumeration value="DIVISION" />
      <xs:enumeration value="REMAINDER" />
      <xs:enumeration value="ADDITION" />
      <xs:enumeration value="SUBTRACTION" />
      <xs:enumeration value="LEFT" />
      <xs:enumeration value="RIGHT" />
      <xs:enumeration value="AND" />
      <xs:enumeration value="XOR" />
      <xs:enumeration value="OR" />
    </xs:restriction>
  </xs:simpleType>


  <xs:complexType name="AssignmentNode">
    <xs:complexContent>
      <xs:extension base="mdn:ModificationNode">
        <xs:sequence>
          <xs:element name="assignmentType"
                      type="asn:AST_ASSIGNMENT_TYPE"
                      minOccurs="0" />
          <xs:element name="rhs" type="exn:ExpressionNode" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

  <xs:complexType name="AssignmentNodes">
    <xs:complexContent>
      <xs:extension base="astnode:ASTNode">
        <xs:sequence>
          <xs:element name="child"
                      type="asn:AssignmentNode"
                      minOccurs="0"
                      maxOccurs="unbounded" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/RealLiteralNode"
           xmlns:pen="http://vsl.cis.udel.edu/ns/tass/statement/expression/PureExpressionNode"
           xmlns:en="http://vsl.cis.udel.edu/ns/tass/statement/expression/ExpressionNode"
           xmlns:misc="http://vsl.cis.udel.edu/ns/tass/misc"
           xmlns:astnode="http://vsl.cis.udel.edu/ns/tass/ASTNode"
           xmlns:ln="http://vsl.cis.udel.edu/ns/tass/statement/expression/LiteralNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/ExpressionNode"
             schemaLocation="ExpressionNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/LiteralNode"
             schemaLocation="LiteralNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/misc"
             schemaLocation="../../misc.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/ASTNode"
             schemaLocation="../../ASTNode.xsd" />

  <xs:complexType name="RealLiteralNode">
    <xs:complexContent>
      <xs:extension base="ln:LiteralNode">
        <xs:sequence>
          <xs:element name="realValue"
                      type="xs:double" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/LiteralNode"
           xmlns:pen="http://vsl.cis.udel.edu/ns/tass/statement/expression/PureExpressionNode"
           xmlns:en="http://vsl.cis.udel.edu/ns/tass/statement/expression/ExpressionNode"
           xmlns:misc="http://vsl.cis.udel.edu/ns/tass/misc"
           xmlns:tn="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
           xmlns:idn="http://vsl.cis.udel.edu/ns/tass/IdentifierNode"
           xmlns:astnode="http://vsl.cis.udel.edu/ns/tass/ASTNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/PureExpressionNode"
             schemaLocation="PureExpressionNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/misc"
             schemaLocation="../../misc.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/ASTNode"
             schemaLocation="../../ASTNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/IdentifierNode"
             schemaLocation="../../IdentifierNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/type/TypeNode"
             schemaLocation="../../type/TypeNode.xsd" />

  <xs:complexType name="LiteralNode">
    <xs:complexContent>
      <xs:extension base="pen:PureExpressionNode">
        <xs:sequence>
          <xs:element name="name"
                      type="idn:IdentifierNode"
                      minOccurs="0"
                      maxOccurs="1" />
          <xs:element name="type"
                      type="tn:TypeNode" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/VariableReferenceNode"
           xmlns:stn="http://vsl.cis.udel.edu/ns/tass/statement/StatementNode"
           xmlns:lhsn="http://vsl.cis.udel.edu/ns/tass/statement/expression/LHSExpressionNode"
           xmlns:misc="http://vsl.cis.udel.edu/ns/tass/misc"
           xmlns:vrn="http://vsl.cis.udel.edu/ns/tass/statement/expression/VariableReferenceNode"
           xmlns:idn="http://vsl.cis.udel.edu/ns/tass/IdentifierNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/StatementNode"
             schemaLocation="../StatementNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/ExpressionNode"
             schemaLocation="ExpressionNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/misc"
             schemaLocation="../../misc.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/LHSExpressionNode"
             schemaLocation="LHSExpressionNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/IdentifierNode"
             schemaLocation="../../IdentifierNode.xsd" />

  <xs:complexType name="VariableReferenceNode">
    <xs:complexContent>
      <xs:extension base="lhsn:LHSExpressionNode">
        <xs:sequence>
          <xs:element name="vref"
                      type="misc:Guid" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/IncrementNode"
           xmlns:in="http://vsl.cis.udel.edu/ns/tass/statement/expression/IncrementNode"
           xmlns:mdn="http://vsl.cis.udel.edu/ns/tass/statement/expression/ModificationNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/ModificationNode"
             schemaLocation="ModificationNode.xsd" />

  <xs:complexType name="IncrementNode">
    <xs:complexContent>
      <xs:extension base="mdn:ModificationNode">
        <xs:attribute name="prefix"
                      type="xs:boolean"
                      default="true" />
        <xs:attribute name="increment"
                      type="xs:boolean"
                      default="true" />
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/SubscriptNode"
           xmlns:ssn="http://vsl.cis.udel.edu/ns/tass/statement/expression/SubscriptNode"
           xmlns:exn="http://vsl.cis.udel.edu/ns/tass/statement/expression/ExpressionNode"
           xmlns:lhsn="http://vsl.cis.udel.edu/ns/tass/statement/expression/LHSExpressionNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/LHSExpressionNode"
             schemaLocation="LHSExpressionNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/ExpressionNode"
             schemaLocation="ExpressionNode.xsd" />

  <xs:complexType name="SubscriptNode">
    <xs:complexContent>
      <xs:extension base="lhsn:LHSExpressionNode">
        <xs:sequence>
          <xs:element name="arrayExpression"
                      type="exn:ExpressionNode" />
          <xs:element name="indexExpression"
                      type="exn:ExpressionNode" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/ModificationNode"
           xmlns:mdn="http://vsl.cis.udel.edu/ns/tass/statement/expression/ModificationNode"
           xmlns:lhsn="http://vsl.cis.udel.edu/ns/tass/statement/expression/LHSExpressionNode"
           xmlns:seen="http://vsl.cis.udel.edu/ns/tass/statement/expression/SideEffectExpressionNode"
           xmlns:astnode="http://vsl.cis.udel.edu/ns/tass/ASTNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/LHSExpressionNode"
             schemaLocation="LHSExpressionNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/SideEffectExpressionNode"
             schemaLocation="SideEffectExpressionNode.xsd" />
  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/ASTNode"
             schemaLocation="../../ASTNode.xsd" />

  <xs:complexType name="ModificationNode">
    <xs:complexContent>
      <xs:extension base="seen:SideEffectExpressionNode">
        <xs:sequence>
          <xs:element name="lhs" type="lhsn:LHSExpressionNode" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

  <xs:complexType name="ModificationNodes">
    <xs:complexContent>
      <xs:extension base="astnode:ASTNode">
        <xs:sequence>
          <xs:element name="child"
                      type="mdn:ModificationNode"
                      minOccurs="0"
                      maxOccurs="unbounded" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

</xs:schema>

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://vsl.cis.udel.edu/ns/tass/statement/expression/OperatorNode"
           xmlns:on="http://vsl.cis.udel.edu/ns/tass/statement/expression/OperatorNode"
           xmlns:pen="http://vsl.cis.udel.edu/ns/tass/statement/expression/PureExpressionNode"
           xmlns:exn="http://vsl.cis.udel.edu/ns/tass/statement/expression/ExpressionNode"
           elementFormDefault="qualified">

  <xs:import namespace="http://vsl.cis.udel.edu/ns/tass/statement/e