Re: [sca-assembly] Extensibility of current Assembly Schema

[Mike Edwards <mike_edwards@uk.ibm.com>]

Luciano,

I don't know whether you want to raise
a formal issue on this topic - your note is not marked "new issue"
so
I can't treat it as such.

I will put it on the agenda for today's
call as a discussion item - it would be great if you could join the call.


Yours,  Mike.

Strategist - Emerging Technologies, SCA & SDO.
Co Chair OASIS SCA Assembly TC.
IBM Hursley Park, Mail Point 146, Winchester, SO21 2JN, Great Britain.
Phone & FAX: +44-1962-818014    Mobile: +44-7802-467431  
Email:  mike_edwards@uk.ibm.com

From:	"Luciano Resende" <luciano_resende@us.ibm.com>
To:	sca-assembly@lists.oasis-open.org
Cc:	"Luciano Resende" <luciano_resende@us.ibm.com>, "Raymond Feng" <rfeng@us.ibm.com>
Date:	04/02/2010 19:17
Subject:	[sca-assembly] Extensibility of current Assembly Schema

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In Apache Tuscany, we make heavy usage
of the extensibility capabilities of the SCA Schema to create new implementation/bindings
or extend existent ones. While trying to move our current implementation
to the latest schema drafts, we have started to hit various issues similar
to the one described in ASSEMBLY-177.
]]

- The CompoentType definition needs to remove the XSD any declaration
- The Callback definition needs to remove the XSD any declaration
- There are issues trying to define new WireFormats and OperationSelectors
and we might need to add similar approach from ASSEMBLY-177 to accommodate
this.

In summary, there is a urgent need to review all the extensibility plug
points for the current schema. After discussing with Raymond Feng, we suggest
that all the places that have both <any> and substitutionGroup be
reviewed, including <implementation>, <binding>, <wireFormat>,
<operationSelector> and we could probably re-open Issue 177 to track
this problem.

Also, to avoid these type of issues in the future, I'd like to suggest
that creation of some dummy schemas that extend the SCA ones utilizing
a different namespace to proactively catch these issues.

http://www.osoa.org/jira/browse/ASSEMBLY-177

- Luciano

Luciano Resende Open Source SOA - Apache Tuscany 4400 N 1st St, San Jose - CA notes: Luciano Resende/Westford/IBM internet IBM: luciano_resende@us.ibm.com internet ASF: lresende@apache.org	Personal blog @ developerWorks : link Apache Tuscany blog: link
Great things are not done by impulse but by a series of small things brought together - Vincent Van Gogh

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