<xsd:element name="ColorMapEntry"> <xsd:complexType> <xsd:attribute name="color" type="xsd:string" use="required"/> <xsd:attribute name="opacity" type="xsd:double"/> <xsd:attribute name="quantity" type="xsd:double"/> <xsd:attribute name="label" type="xsd:string"/> </xsd:complexType> </xsd:element>