Request for changes for the GLUE XSD rendering

Extensible Service, Endpoint, and/or Domain

This change would enable the applications to define their own services without modifying the original schema - using the glue2 as schema library. Therefore the derived services will not only be limited to storage or compute (as included in the original schema) but can be virtualization, (meta-)data, accounting, map-reduce or other domain specific services.

In order to support such extensions some of the normative changes (see below) can be incorporated into the glue2 schema:

GLUE2.xsd

<element name="Service" type="glue:ServiceBase_t" abstract="true" /> <element name="Endpoint" type="glue:EndpointBase_t" abstract="true" />

<element name="Services"> <complexType> <sequence> <element ref="glue2:Service" maxOccurs="unbounded" minOccurs="0"></element> </sequence> </complexType> </element>

Target Application Schema (arbitrary example)

<complexType name="AccountingService_t"> <complexContent> <extension base="service:Service_t"> <sequence> <element name="Usage" type="integer"></element> </sequence> </extension> </complexContent> </complexType>

<complexType name="AccountingServiceEndpoint_t"> <complexContent> <extension base="service:ServiceEndpoint_t"> <sequence> <element name="Protocol" type="string"></element> </sequence> </extension> </complexContent> </complexType>