[sca-bpel] NEW ISSUE: SCA-BPEL XML Namespaces

[Dieter Koenig1 <dieterkoenig@de.ibm.com>]

TARGET: SCA Client and Implementation Model Specification for WS-BPEL -
note that the SCA Assembly Model is also affected.


DESCRIPTION: All SCA assembly model elements have a common namespace
(currently "http://www.osoa.org/xmlns/sca/1.0"; - which will change to an
OASIS namespace - to be clarified with the SCA-Assembly TC and OASIS).

This issue is about two SCA-BPEL areas that sould be separated from the
common namespace.

1. For the SCA extensions (sca:property, sca:multiReference, etc.) in a
WS-BPEL process, there is no point in having these extensions in a common
schema with the SCA assembly model (processes and assemblies are disjoint
artifacts).

2. The XML schema element "serviceReferenceList" introduced in the SCA-BPEL
specification is neither an SCA assembly model nor a BPEL process model
element and should be separated as well.


PROPOSAL: Use separate XML namespaces for SCA and SCA-BPEL, e.g. something
like this:

SCA Assembly Model (to be verified) ==>
http://docs.oasis-open.org/sca/1.1/assembly
WS-BPEL 2.0 extensions for SCA      ==>
http://docs.oasis-open.org/sca/1.1/bpel/process
Data element "serviceReferenceList" ==>
http://docs.oasis-open.org/sca/1.1/bpel/types

The SCA-BPEL TC may resolve this issue by separating these namespaces now,
i.e. by using different prefixes, and aligning the namespace declarations
with the SCA-Assembly TC and OASIS later.


Kind Regards
DK