Annex E (normative) OPC Binary Type Description System ToC Previous Next

E.5 OPC Binary XML Schema ToC Previous Next

<?xml version="1.0" encoding="utf-8" ?>
<xs:schema
targetNamespace="http://opcfoundation.org/BinarySchema/"
elementFormDefault="qualified"
xmlns="http://opcfoundation.org/BinarySchema/"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
>
<xs:element name="Documentation">
<xs:complexType mixed="true">
<xs:choice minOccurs="0" maxOccurs="unbounded">
<xs:any minOccurs="0" maxOccurs="unbounded"/>
</xs:choice>
<xs:anyAttribute/>
</xs:complexType>
</xs:element>

<xs:complexType name="ImportDirective">
<xs:attribute name="Namespace" type="xs:string" use="optional" />
<xs:attribute name="Location" type="xs:string" use="optional" />
</xs:complexType>

<xs:simpleType name="ByteOrder">
<xs:restriction base="xs:string">
<xs:enumeration value="BigEndian" />
<xs:enumeration value="LittleEndian" />
</xs:restriction>
</xs:simpleType>

<xs:complexType name="TypeDescription">
<xs:sequence>
<xs:element ref="Documentation" minOccurs="0" maxOccurs="1" />
</xs:sequence>
<xs:attribute name="Name" type="xs:NCName" use="required" />
<xs:attribute name="DefaultByteOrder" type="ByteOrder" use="optional" />
<xs:anyAttribute processContents="lax" />
</xs:complexType>

<xs:complexType name="OpaqueType">
<xs:complexContent>
<xs:extension base="TypeDescription">
<xs:attribute name="LengthInBits" type="xs:int" use="optional" />
<xs:attribute name="ByteOrderSignificant" type="xs:boolean" default="false" />
</xs:extension>
</xs:complexContent>
</xs:complexType>

<xs:complexType name="EnumeratedValue">
<xs:sequence>
<xs:element ref="Documentation"  minOccurs="0" maxOccurs="1" />
</xs:sequence>
<xs:attribute name="Name" type="xs:string" use="optional" />
<xs:attribute name="Value" type="xs:unsignedInt" use="optional" />
</xs:complexType>

<xs:complexType name="EnumeratedType">
<xs:complexContent>
<xs:extension base="OpaqueTypeDescription">
<xs:sequence>
<xs:element name="EnumeratedValue"
type="EnumeratedValueDescription" maxOccurs="unbounded" />
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>

<xs:simpleType name="SwitchOperand">
<xs:restriction base="xs:string">
<xs:enumeration value="Equals" />
<xs:enumeration value="GreaterThan" />
<xs:enumeration value="LessThan" />
<xs:enumeration value="GreaterThanOrEqual" />
<xs:enumeration value="LessThanOrEqual" />
<xs:enumeration value="NotEqual" />
</xs:restriction>
</xs:simpleType>

<xs:complexType name="FieldType">
<xs:sequence>
<xs:element ref="Documentation" minOccurs="0" maxOccurs="1" />
</xs:sequence>
<xs:attribute name="Name" type="xs:string" use="required" />
<xs:attribute name="TypeName" type="xs:QName" use="optional" />
<xs:attribute name="Length" type="xs:unsignedInt" use="optional" />
<xs:attribute name="LengthField" type="xs:string" use="optional" />
<xs:attribute name="IsLengthInBytes" type="xs:boolean" default="false" />
<xs:attribute name="SwitchField" type="xs:string" use="optional" />
<xs:attribute name="SwitchValue" type="xs:unsignedInt" use="optional" />
<xs:attribute name="SwitchOperand" type="SwitchOperand" use="optional" />
<xs:attribute name="Terminator" type="xs:hexBinary" use="optional" />
<xs:anyAttribute processContents="lax" />
</xs:complexType>

<xs:complexType name="StructuredType">
<xs:complexContent>
<xs:extension base="TypeDescription">
<xs:sequence>
<xs:element name="Field" type="FieldType"
minOccurs="0" maxOccurs="unbounded" />
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>

<xs:element name="TypeDictionary">
<xs:complexType>
<xs:sequence>
<xs:element ref="Documentation"  minOccurs="0" maxOccurs="1" />
<xs:element name="Import" type="ImportDirective"
minOccurs="0" maxOccurs="unbounded" />
<xs:choice minOccurs="0" maxOccurs="unbounded">
<xs:element name="OpaqueType" type="OpaqueType" />
<xs:element name="EnumeratedType" type="EnumeratedType" />
<xs:element name="StructuredType" type="StructuredType" />
</xs:choice>
</xs:sequence>
<xs:attribute name="TargetNamespace" type="xs:string" use="required" />
<xs:attribute name="DefaultByteOrder" type="ByteOrder" use="optional" />
</xs:complexType>
</xs:element>

</xs:schema>

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