diff --git a/ChangeLog b/ChangeLog
index 6247585e..fe4c8b25 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Jun 15 11:08:34 CEST 2005 Kasimier Buchcik <libxml2-cvs@cazic.net>
+
+	* test/schemas/bug306806_1.xsd test/schemas/bug306806_0.xml:
+	  Added schema tests submitted by Tom Browder (bug #306806).
+
 Tue Jun 14 15:03:22 PDT 2005 William Brack <wbrack@mmm.com.hk>
 
 	* pattern.c: adjusted last change to xmlCompilePathPattern,
diff --git a/test/schemas/bug306806_0.xml b/test/schemas/bug306806_0.xml
new file mode 100644
index 00000000..90c55e1c
--- /dev/null
+++ b/test/schemas/bug306806_0.xml
@@ -0,0 +1,111 @@
+<?xml version = '1.0'?>
+<targetGeometry
+  xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'
+  xsi:noNamespaceSchemaLocation='bug306806_1.xsd'>
+  <!-- type 1 cylinder (original) -->
+  <component name="1502">
+    <description>/all/turbine/r.turbshaft</description>
+    <cylinder name="s.turbshaft">
+      <radius dimension='L' Length='inch'>     1.375 </radius>
+      <length dimension='L' Length='inch'>    30.250 </length>
+      <cyl-transform>
+        <translation dimension='L' Length='inch'>   -13.125     0.000     0.000</translation>
+        <rotation dimension='L' Length='degree'>    -0.000    90.000     0.000</rotation>
+      </cyl-transform>
+      <description>/all/turbine/r.turbshaft/s.turbshaft</description>
+    </cylinder>
+  </component>
+
+<geometryGroup name='g0'>
+  <!-- type 2 cylinder (new, version2) -->
+  <component name="1502">
+    <description>/all/turbine/r.turbshaft</description>
+    <cylinder name="s.turbshaft">
+      <radius dimension='L' Length='inch'>     1.375 </radius>
+      <base1 dimension='L' Length='inch'>  0 0 0 </base1>
+      <base2 dimension='L' Length='inch'>  1.1 1.1 1.1 </base2>
+      <description>/all/turbine/r.turbshaft/s.turbshaft</description>
+    </cylinder>
+  </component>
+
+<geometryGroup name='g1'>
+  <!-- type 2 cylinder (new, version2) -->
+  <component name="1502">
+    <description>/all/turbine/r.turbshaft</description>
+    <cylinder name="s.turbshaft">
+      <radius dimension='L' Length='inch'>     1.375 </radius>
+      <base1 dimension='L' Length='inch'>  0 0 0 </base1>
+      <base2 dimension='L' Length='inch'>  1.1 1.1 1.1 </base2>
+      <description>/all/turbine/r.turbshaft/s.turbshaft</description>
+    </cylinder>
+  </component>
+</geometryGroup>
+
+  <!-- type 2 cylinder (new, version2) -->
+  <component name="1502">
+    <description>/all/turbine/r.turbshaft</description>
+    <cylinder name="s.turbshaft">
+      <radius dimension='L' Length='inch'>     1.375 </radius>
+      <base1 dimension='L' Length='inch'>  0 0 0 </base1>
+      <base2 dimension='L' Length='inch'>  1.1 1.1 1.1 </base2>
+      <description>/all/turbine/r.turbshaft/s.turbshaft</description>
+    </cylinder>
+  </component>
+
+  <!-- type 2 cylinder (new, version2) -->
+  <component name="1502">
+    <description>/all/turbine/r.turbshaft</description>
+    <cylinder name="s.turbshaft">
+      <radius dimension='L' Length='inch'>     1.375 </radius>
+      <base1 dimension='L' Length='inch'>  0 0 0 </base1>
+      <base2 dimension='L' Length='inch'>  1.1 1.1 1.1 </base2>
+      <description>/all/turbine/r.turbshaft/s.turbshaft</description>
+    </cylinder>
+  </component>
+</geometryGroup>
+
+  <!-- type 2 cylinder (new, version2) -->
+  <component name="1502">
+    <description>/all/turbine/r.turbshaft</description>
+    <cylinder name="s.turbshaft">
+      <radius dimension='L' Length='inch'>     1.375 </radius>
+      <base1 dimension='L' Length='inch'>  0 0 0 </base1>
+      <base2 dimension='L' Length='inch'>  1.1 1.1 1.1 </base2>
+      <description>/all/turbine/r.turbshaft/s.turbshaft</description>
+    </cylinder>
+  </component>
+
+  <!-- type 2 cylinder (new, version2) -->
+  <component name="1502">
+    <description>/all/turbine/r.turbshaft</description>
+    <cylinder name="s.turbshaft">
+      <radius dimension='L' Length='inch'>     1.375 </radius>
+      <base1 dimension='L' Length='inch'>  0 0 0 </base1>
+      <base2 dimension='L' Length='inch'>  1.1 1.1 1.1 </base2>
+      <description>/all/turbine/r.turbshaft/s.turbshaft</description>
+    </cylinder>
+  </component>
+
+  <!-- type 2 cylinder (new, version2) -->
+  <component name="1502">
+    <description>/all/turbine/r.turbshaft</description>
+    <cylinder name="s.turbshaft">
+      <radius dimension='L' Length='inch'>     1.375 </radius>
+      <base1 dimension='L' Length='inch'>  0 0 0 </base1>
+      <base2 dimension='L' Length='inch'>  1.1 1.1 1.1 </base2>
+      <description>/all/turbine/r.turbshaft/s.turbshaft</description>
+    </cylinder>
+  </component>
+
+  <!-- type 2 cylinder (new, version2) -->
+  <component name="1502">
+    <description>/all/turbine/r.turbshaft</description>
+    <cylinder name="s.turbshaft">
+      <radius dimension='L' Length='inch'>     1.375 </radius>
+      <base1 dimension='L' Length='inch'>  0 0 0 </base1>
+      <base2 dimension='L' Length='inch'>  1.1 1.1 1.1 </base2>
+      <description>/all/turbine/r.turbshaft/s.turbshaft</description>
+    </cylinder>
+  </component>
+
+</targetGeometry>
diff --git a/test/schemas/bug306806_1.xsd b/test/schemas/bug306806_1.xsd
new file mode 100644
index 00000000..edc805d5
--- /dev/null
+++ b/test/schemas/bug306806_1.xsd
@@ -0,0 +1,544 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified">
+  <xs:element name="targetGeometry">
+    <xs:complexType>
+      <xs:group minOccurs="0" maxOccurs="unbounded" ref="geometry-element"/>
+    </xs:complexType>
+  </xs:element>
+  <xs:element name="geometryGroup" type="geometryGroup-content"/>
+  <xs:complexType name="geometryGroup-content">
+    <xs:group maxOccurs="unbounded" ref="geometry-element"/>
+    <xs:attribute name="name" use="required" type="xs:token"/>
+  </xs:complexType>
+  <xs:group name="geometry-element">
+    <xs:sequence>
+      <xs:choice minOccurs="0" maxOccurs="unbounded">
+        <xs:element ref="component"/>
+        <xs:element ref="geometryGroup"/>
+      </xs:choice>
+    </xs:sequence>
+  </xs:group>
+  <xs:element name="component">
+    <xs:complexType>
+      <xs:sequence>
+        <xs:element minOccurs="0" ref="description"/>
+        <xs:choice minOccurs="0" maxOccurs="unbounded">
+          <xs:element ref="cylinder"/>
+          <xs:element ref="ellipsoid"/>
+          <xs:element ref="faceSet"/>
+          <xs:element ref="tube"/>
+          <xs:element ref="sphere"/>
+          <xs:element ref="box"/>
+          <xs:element ref="extrusion"/>
+        </xs:choice>
+      </xs:sequence>
+      <xs:attributeGroup ref="name-attribute"/>
+    </xs:complexType>
+  </xs:element>
+  <xs:element name="translation">
+    <xs:complexType>
+      <xs:simpleContent>
+        <xs:extension base="three-doubles-list">
+          <xs:attributeGroup ref="dimension-attribute"/>
+          <xs:attributeGroup ref="Length-attribute"/>
+        </xs:extension>
+      </xs:simpleContent>
+    </xs:complexType>
+  </xs:element>
+  <xs:element name="rotation">
+    <xs:complexType>
+      <xs:simpleContent>
+        <xs:extension base="three-doubles-list">
+          <xs:attributeGroup ref="dimension-attribute"/>
+          <xs:attributeGroup ref="Length-attribute"/>
+        </xs:extension>
+      </xs:simpleContent>
+    </xs:complexType>
+  </xs:element>
+  <xs:element name="about">
+    <xs:complexType>
+      <xs:simpleContent>
+        <xs:extension base="three-doubles-list">
+          <xs:attributeGroup ref="dimension-attribute"/>
+          <xs:attributeGroup ref="Length-attribute"/>
+        </xs:extension>
+      </xs:simpleContent>
+    </xs:complexType>
+  </xs:element>
+  <xs:element name="length">
+    <xs:complexType>
+      <xs:simpleContent>
+        <xs:restriction base="xs:anyType">
+          <xs:simpleType>
+            <xs:restriction base="xs:double">
+              <xs:minExclusive value="0"/>
+            </xs:restriction>
+          </xs:simpleType>
+          <xs:attributeGroup ref="dimension-attribute"/>
+          <xs:attributeGroup ref="Length-attribute"/>
+        </xs:restriction>
+      </xs:simpleContent>
+    </xs:complexType>
+  </xs:element>
+  <xs:element name="radius">
+    <xs:complexType>
+      <xs:simpleContent>
+        <xs:restriction base="xs:anyType">
+          <xs:simpleType>
+            <xs:restriction base="xs:double">
+              <xs:minExclusive value="0"/>
+            </xs:restriction>
+          </xs:simpleType>
+          <xs:attributeGroup ref="dimension-attribute"/>
+          <xs:attributeGroup ref="Length-attribute"/>
+        </xs:restriction>
+      </xs:simpleContent>
+    </xs:complexType>
+  </xs:element>
+  <xs:element name="base1">
+    <xs:complexType>
+      <xs:simpleContent>
+        <xs:extension base="three-doubles-list">
+          <xs:attributeGroup ref="dimension-attribute"/>
+          <xs:attributeGroup ref="Length-attribute"/>
+        </xs:extension>
+      </xs:simpleContent>
+    </xs:complexType>
+  </xs:element>
+  <xs:element name="base2">
+    <xs:complexType>
+      <xs:simpleContent>
+        <xs:extension base="three-doubles-list">
+          <xs:attributeGroup ref="dimension-attribute"/>
+          <xs:attributeGroup ref="Length-attribute"/>
+        </xs:extension>
+      </xs:simpleContent>
+    </xs:complexType>
+  </xs:element>
+  <xs:element name="transform">
+    <xs:complexType>
+      <xs:sequence>
+        <xs:element minOccurs="0" ref="translation"/>
+        <xs:element minOccurs="0" ref="rotation"/>
+        <xs:element minOccurs="0" ref="about"/>
+      </xs:sequence>
+    </xs:complexType>
+  </xs:element>
+  <xs:element name="cyl-transform">
+    <xs:complexType>
+      <xs:sequence>
+        <xs:element ref="translation"/>
+        <xs:element minOccurs="0" ref="rotation"/>
+        <xs:element minOccurs="0" ref="about"/>
+      </xs:sequence>
+    </xs:complexType>
+  </xs:element>
+  <xs:element name="cylinder">
+    <xs:complexType>
+      <xs:choice minOccurs="0" maxOccurs="unbounded">
+        <xs:element ref="radius"/>
+        <xs:choice>
+          <xs:choice>
+            <xs:element ref="length"/>
+            <xs:element ref="cyl-transform"/>
+          </xs:choice>
+          <xs:choice>
+            <xs:element ref="base1"/>
+            <xs:element ref="base2"/>
+            <xs:element minOccurs="0" maxOccurs="unbounded" ref="transform"/>
+          </xs:choice>
+        </xs:choice>
+        <xs:element ref="description"/>
+        <xs:element ref="vMaterial"/>
+      </xs:choice>
+      <xs:attributeGroup ref="name-attribute"/>
+    </xs:complexType>
+  </xs:element>
+  <xs:element name="ellipsoid">
+    <xs:complexType>
+      <xs:choice minOccurs="0" maxOccurs="unbounded">
+        <xs:element name="radius">
+          <xs:complexType>
+            <xs:simpleContent>
+              <xs:extension base="three-doubles-list">
+                <xs:attributeGroup ref="length-attribute"/>
+              </xs:extension>
+            </xs:simpleContent>
+          </xs:complexType>
+        </xs:element>
+        <xs:element ref="vMaterial"/>
+        <xs:element ref="transform"/>
+      </xs:choice>
+      <xs:attributeGroup ref="name-attribute"/>
+    </xs:complexType>
+  </xs:element>
+  <xs:element name="faceSet">
+    <xs:complexType>
+      <xs:choice minOccurs="0" maxOccurs="unbounded">
+        <xs:element ref="description"/>
+        <xs:element ref="vertex_normals"/>
+        <xs:element ref="vertices"/>
+        <xs:element ref="facets"/>
+        <xs:group ref="optional-content"/>
+      </xs:choice>
+      <xs:attribute name="name" type="xs:token"/>
+    </xs:complexType>
+  </xs:element>
+  <xs:element name="facets" type="facets-content"/>
+  <xs:simpleType name="facets-content">
+    <xs:restriction base="integer-list"/>
+  </xs:simpleType>
+  <xs:element name="vertex_normals" type="vertex_normals-content"/>
+  <xs:complexType name="vertex_normals-content">
+    <xs:simpleContent>
+      <xs:restriction base="xs:anyType">
+        <xs:simpleType>
+          <xs:restriction>
+            <xs:simpleType>
+              <xs:list>
+                <xs:simpleType>
+                  <xs:union>
+                    <xs:simpleType>
+                      <xs:union memberTypes="xs:double xs:double xs:double"/>
+                    </xs:simpleType>
+                    <xs:simpleType>
+                      <xs:union memberTypes="xs:double xs:double xs:double"/>
+                    </xs:simpleType>
+                    <xs:simpleType>
+                      <xs:union memberTypes="xs:double xs:double xs:double"/>
+                    </xs:simpleType>
+                    <xs:simpleType>
+                      <xs:union memberTypes="xs:double xs:double xs:double"/>
+                    </xs:simpleType>
+                  </xs:union>
+                </xs:simpleType>
+              </xs:list>
+            </xs:simpleType>
+            <xs:minLength value="9"/>
+          </xs:restriction>
+        </xs:simpleType>
+        <xs:attributeGroup ref="length-attribute"/>
+      </xs:restriction>
+    </xs:simpleContent>
+  </xs:complexType>
+  <xs:element name="vertices" type="vertices-content"/>
+  <xs:complexType name="vertices-content">
+    <xs:simpleContent>
+      <xs:restriction base="xs:anyType">
+        <xs:simpleType>
+          <xs:restriction>
+            <xs:simpleType>
+              <xs:list>
+                <xs:simpleType>
+                  <xs:union>
+                    <xs:simpleType>
+                      <xs:union memberTypes="xs:double xs:double xs:double"/>
+                    </xs:simpleType>
+                    <xs:simpleType>
+                      <xs:union memberTypes="xs:double xs:double xs:double"/>
+                    </xs:simpleType>
+                    <xs:simpleType>
+                      <xs:union memberTypes="xs:double xs:double xs:double"/>
+                    </xs:simpleType>
+                    <xs:simpleType>
+                      <xs:union memberTypes="xs:double xs:double xs:double"/>
+                    </xs:simpleType>
+                  </xs:union>
+                </xs:simpleType>
+              </xs:list>
+            </xs:simpleType>
+            <xs:minLength value="9"/>
+          </xs:restriction>
+        </xs:simpleType>
+        <xs:attributeGroup ref="length-attribute"/>
+      </xs:restriction>
+    </xs:simpleContent>
+  </xs:complexType>
+  <xs:element name="tube" type="tube-content"/>
+  <xs:complexType name="tube-content">
+    <xs:choice minOccurs="0" maxOccurs="unbounded">
+      <xs:element ref="spine"/>
+      <xs:element ref="radius"/>
+      <xs:group ref="optional-content"/>
+    </xs:choice>
+    <xs:attributeGroup ref="name-attribute"/>
+  </xs:complexType>
+  <xs:element name="spine" type="spine-content"/>
+  <xs:complexType name="spine-content">
+    <xs:simpleContent>
+      <xs:restriction base="xs:anyType">
+        <xs:simpleType>
+          <xs:restriction>
+            <xs:simpleType>
+              <xs:list>
+                <xs:simpleType>
+                  <xs:union>
+                    <xs:simpleType>
+                      <xs:union memberTypes="xs:double xs:double xs:double"/>
+                    </xs:simpleType>
+                    <xs:simpleType>
+                      <xs:union memberTypes="xs:double xs:double xs:double"/>
+                    </xs:simpleType>
+                  </xs:union>
+                </xs:simpleType>
+              </xs:list>
+            </xs:simpleType>
+            <xs:minLength value="6"/>
+          </xs:restriction>
+        </xs:simpleType>
+        <xs:attributeGroup ref="length-attribute"/>
+      </xs:restriction>
+    </xs:simpleContent>
+  </xs:complexType>
+  <xs:element name="sphere" type="sphere-content"/>
+  <xs:complexType name="sphere-content">
+    <xs:choice minOccurs="0" maxOccurs="unbounded">
+      <xs:element ref="radius"/>
+      <xs:element ref="position"/>
+    </xs:choice>
+    <xs:attributeGroup ref="name-attribute"/>
+  </xs:complexType>
+  <xs:element name="position" type="position-content"/>
+  <xs:complexType name="position-content">
+    <xs:simpleContent>
+      <xs:extension base="three-doubles-list">
+        <xs:attributeGroup ref="length-attribute"/>
+      </xs:extension>
+    </xs:simpleContent>
+  </xs:complexType>
+  <xs:element name="box" type="box-content"/>
+  <xs:complexType name="box-content">
+    <xs:choice minOccurs="0" maxOccurs="unbounded">
+      <xs:element ref="size"/>
+      <xs:choice>
+        <xs:element ref="position"/>
+        <xs:element ref="transform"/>
+      </xs:choice>
+    </xs:choice>
+    <xs:attributeGroup ref="name-attribute"/>
+  </xs:complexType>
+  <xs:element name="size" type="size-content"/>
+  <xs:complexType name="size-content">
+    <xs:simpleContent>
+      <xs:extension base="three-doubles-list">
+        <xs:attributeGroup ref="length-attribute"/>
+      </xs:extension>
+    </xs:simpleContent>
+  </xs:complexType>
+  <xs:element name="extrusion" type="extrusion-content"/>
+  <xs:complexType name="extrusion-content">
+    <xs:choice minOccurs="0" maxOccurs="unbounded">
+      <xs:element ref="spine"/>
+      <xs:element ref="scale"/>
+      <xs:element ref="crossSection"/>
+      <xs:group ref="optional-content"/>
+    </xs:choice>
+    <xs:attributeGroup ref="name-attribute"/>
+  </xs:complexType>
+  <xs:element name="scale" type="scale-content"/>
+  <xs:simpleType name="scale-content">
+    <xs:restriction>
+      <xs:simpleType>
+        <xs:list>
+          <xs:simpleType>
+            <xs:union memberTypes="xs:double xs:double"/>
+          </xs:simpleType>
+        </xs:list>
+      </xs:simpleType>
+      <xs:minLength value="2"/>
+    </xs:restriction>
+  </xs:simpleType>
+  <xs:element name="crossSection" type="crossSection-content"/>
+  <xs:complexType name="crossSection-content">
+    <xs:simpleContent>
+      <xs:restriction base="xs:anyType">
+        <xs:simpleType>
+          <xs:restriction>
+            <xs:simpleType>
+              <xs:list>
+                <xs:simpleType>
+                  <xs:union>
+                    <xs:simpleType>
+                      <xs:union memberTypes="xs:double xs:double xs:double"/>
+                    </xs:simpleType>
+                    <xs:simpleType>
+                      <xs:union memberTypes="xs:double xs:double xs:double"/>
+                    </xs:simpleType>
+                    <xs:simpleType>
+                      <xs:union memberTypes="xs:double xs:double xs:double"/>
+                    </xs:simpleType>
+                  </xs:union>
+                </xs:simpleType>
+              </xs:list>
+            </xs:simpleType>
+            <xs:minLength value="9"/>
+          </xs:restriction>
+        </xs:simpleType>
+        <xs:attributeGroup ref="length-attribute"/>
+        <xs:attributeGroup ref="closed-attribute"/>
+      </xs:restriction>
+    </xs:simpleContent>
+  </xs:complexType>
+  <xs:attributeGroup name="closed-attribute">
+    <xs:attribute name="closed" use="required" type="xs:boolean"/>
+  </xs:attributeGroup>
+  <xs:group name="optional-content">
+    <xs:annotation>
+      <xs:documentation>global #############</xs:documentation>
+    </xs:annotation>
+    <xs:sequence>
+      <xs:choice minOccurs="0" maxOccurs="unbounded">
+        <xs:element ref="transform"/>
+        <xs:element ref="vMaterial"/>
+      </xs:choice>
+    </xs:sequence>
+  </xs:group>
+  <xs:element name="description" type="xs:string"/>
+  <xs:attributeGroup name="length-attribute">
+    <xs:attributeGroup ref="dimension-attribute"/>
+    <xs:attributeGroup ref="Length-attribute"/>
+  </xs:attributeGroup>
+  <xs:attributeGroup name="dimension-attribute">
+    <xs:attribute name="dimension" use="required">
+      <xs:simpleType>
+        <xs:restriction base="xs:token">
+          <xs:enumeration value="L"/>
+          <xs:enumeration value="F"/>
+          <xs:enumeration value="M"/>
+          <xs:enumeration value="T"/>
+          <xs:enumeration value="F/L"/>
+          <xs:enumeration value="F/LL"/>
+          <xs:enumeration value="F/LLL"/>
+          <xs:enumeration value="F/T"/>
+          <xs:enumeration value="F/TT"/>
+          <xs:enumeration value="F/TTT"/>
+          <xs:enumeration value="L/T"/>
+          <xs:enumeration value="L/TT"/>
+          <xs:enumeration value="LLLLL"/>
+          <xs:enumeration value="D/D"/>
+        </xs:restriction>
+      </xs:simpleType>
+    </xs:attribute>
+  </xs:attributeGroup>
+  <xs:attributeGroup name="Length-attribute">
+    <xs:attribute name="Length" use="required">
+      <xs:simpleType>
+        <xs:restriction base="xs:token">
+          <xs:enumeration value="meter"/>
+          <xs:enumeration value="m"/>
+          <xs:enumeration value="foot"/>
+          <xs:enumeration value="f"/>
+          <xs:enumeration value="inch"/>
+          <xs:enumeration value="in"/>
+          <xs:enumeration value="centimeter"/>
+          <xs:enumeration value="cm"/>
+          <xs:enumeration value="decimeter"/>
+          <xs:enumeration value="dm"/>
+          <xs:enumeration value="millimeter"/>
+          <xs:enumeration value="mm"/>
+          <xs:enumeration value="degree"/>
+        </xs:restriction>
+      </xs:simpleType>
+    </xs:attribute>
+  </xs:attributeGroup>
+  <xs:attributeGroup name="Time-attribute">
+    <xs:attribute name="Time" use="required">
+      <xs:simpleType>
+        <xs:restriction base="xs:token">
+          <xs:enumeration value="second"/>
+          <xs:enumeration value="s"/>
+          <xs:enumeration value="sec"/>
+          <xs:enumeration value="minute"/>
+          <xs:enumeration value="min"/>
+          <xs:enumeration value="hour"/>
+          <xs:enumeration value="hr"/>
+        </xs:restriction>
+      </xs:simpleType>
+    </xs:attribute>
+  </xs:attributeGroup>
+  <xs:attributeGroup name="Force-attribute">
+    <xs:attribute name="Force" use="required">
+      <xs:simpleType>
+        <xs:restriction base="xs:token">
+          <xs:enumeration value="newton"/>
+          <xs:enumeration value="n"/>
+          <xs:enumeration value="pound"/>
+          <xs:enumeration value="grain"/>
+        </xs:restriction>
+      </xs:simpleType>
+    </xs:attribute>
+  </xs:attributeGroup>
+  <xs:attributeGroup name="Mass-attribute">
+    <xs:attribute name="Mass" use="required">
+      <xs:simpleType>
+        <xs:restriction base="xs:token">
+          <xs:enumeration value="kilogram"/>
+          <xs:enumeration value="kg"/>
+          <xs:enumeration value="gram"/>
+        </xs:restriction>
+      </xs:simpleType>
+    </xs:attribute>
+  </xs:attributeGroup>
+  <xs:attributeGroup name="Dimensionless-attribute">
+    <xs:attribute name="Dimensionless" use="required">
+      <xs:simpleType>
+        <xs:restriction base="xs:token">
+          <xs:enumeration value="radian"/>
+          <xs:enumeration value="rad"/>
+        </xs:restriction>
+      </xs:simpleType>
+    </xs:attribute>
+  </xs:attributeGroup>
+  <xs:simpleType name="three-doubles-list">
+    <xs:restriction>
+      <xs:simpleType>
+        <xs:list>
+          <xs:simpleType>
+            <xs:union memberTypes="xs:double xs:double xs:double"/>
+          </xs:simpleType>
+        </xs:list>
+      </xs:simpleType>
+      <xs:length value="3"/>
+    </xs:restriction>
+  </xs:simpleType>
+  <xs:simpleType name="integer-list">
+    <xs:restriction>
+      <xs:simpleType>
+        <xs:list>
+          <xs:simpleType>
+            <xs:union memberTypes="xs:integer xs:integer"/>
+          </xs:simpleType>
+        </xs:list>
+      </xs:simpleType>
+      <xs:minLength value="1"/>
+    </xs:restriction>
+  </xs:simpleType>
+  <xs:attributeGroup name="name-attribute">
+    <xs:attribute name="name" use="required" type="xs:token"/>
+  </xs:attributeGroup>
+  <xs:attributeGroup name="description-attribute">
+    <xs:attribute name="description" use="required"/>
+  </xs:attributeGroup>
+  <xs:element name="vMaterial">
+    <xs:complexType>
+      <xs:sequence>
+        <xs:element minOccurs="0" ref="diffuseColor"/>
+        <xs:element minOccurs="0" ref="emissiveColor"/>
+        <xs:element minOccurs="0" ref="specularColor"/>
+        <xs:element minOccurs="0" ref="shininess"/>
+        <xs:element minOccurs="0" ref="transparency"/>
+        <xs:element minOccurs="0" ref="ambientIntensity"/>
+        <xs:element minOccurs="0" ref="DEF"/>
+        <xs:element minOccurs="0" ref="USE"/>
+      </xs:sequence>
+    </xs:complexType>
+  </xs:element>
+  <xs:element name="diffuseColor" type="xs:string"/>
+  <xs:element name="emissiveColor" type="xs:string"/>
+  <xs:element name="specularColor" type="xs:string"/>
+  <xs:element name="shininess" type="xs:string"/>
+  <xs:element name="transparency" type="xs:string"/>
+  <xs:element name="ambientIntensity" type="xs:string"/>
+  <xs:element name="DEF" type="xs:string"/>
+  <xs:element name="USE" type="xs:string"/>
+</xs:schema>