Listing 1: Grid service description of the simple
workflow execution Grid service

<wsdl:definitions
xmlns:ogsi="http://www.gridforum.org/namespaces/
2003/03/OGSI"
xmlns:gwsdl="http://www.gridforum.org/namespaces/
2003/03/gridWSDLExtensions"
xmlns:wsdl="http://schemas.xmlsoap.org/wsdl"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:bpel="http://schemas.xmlsoap.org/ws/
2003/03/business-process"
xmlns:wf="http://example.com/workflow"
targetNamespace="http://example.com/workflow ">

<wsdl:types/>

<wsdl:message name="executeWorkflowMsg">
<wsdl:part name="process" element="bpel:process"/>
</wsdl:message>

<gwsdl:portType name="workflowExecutionPortType"
extends="ogsi:GridService">
<wsdl:operation name="executeWorkflow">
<wsdl:input message="executeWorkflowMsg"/>
</wsdl:operation>
</gwsdl:portType>
</wsdl:definitions>

Listing 2: Grid service description with service data declarations
of the simple workflow execution Grid service

<wsdl:definitions
xmlns:ogsi="http://www.gridforum.org/namespaces/
2003/03/OGSI"
xmlns:sd="http://www.gridforum.org/namespaces/
2003/03/serviceData"

xmlns:gwsdl="http://www.gridforum.org/namespaces/
2003/03/gridWSDLExtensions"
xmlns:wsdl="http://schemas.xmlsoap.org/wsdl"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:bpel="http://schemas.xmlsoap.org/ws/
2003/03/business-process"
xmlns:wf ="http://example.com/workflow"
targetNamespace="http://example.com/workflow">

<wsdl:types>
<xsd:schema>
<xsd:complexType name="status">
<xsd:choice>
<xsd:element name="running"/>
<xsd:element name="paused"/>
<xsd:element name="completed"/>
</xsd:choice>
</xsd:complexType>
</xsd:schema>
</wsdl:types>

<wsdl:message name="executeWorkflowMsg">
<wsdl:part name="process" element="bpel:process"/>
</wsdl:message>

<gwsdl:portType name="workflowExecutionPortType"
extends="ogsi:GridService">
<wsdl:operation name="executeWorkflow">
<wsdl:input message="executeWorkflowMsg"/>
</wsdl:operation>

<sd:serviceData name="status" type="wf:status"
minOccurs="1" maxOccurs="1"
mutability="mutable"/>
</gwsdl:portType>
</wsdl:definitions>