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Subject: Issue - 305 - Remove query language in favor of expression language for <to>

This issue has been added to the wsbpel issue list with a status of "received". The status will be changed to "open" if a motion to open the issue is proposed and that motion is approved by the TC. A motion could also be proposed to close it without further consideration. Otherwise it will remain as "received".

The issues list is posted as a Technical Committee document to the OASIS WSBPEL TC pages on a regular basis. The current edition, as a TC document, is the most recent version of the document entitled in the "Issues" folder of the WSBPEL TC document list - the next posting as a TC document will include this issue. The list editor's working copy, which will normally include an issue when it is announced, is available at this constant URL.

Issue - 305 - Remove query language in favor of expression language for <to>

Status: received
Date added: 21 Jul 2006
Date submitted: 21 July 2006
Submitter: Chris Keller
Description: In the BPEL 1.1 spec queries had a context. The context for the query was either provided by the propertyAlias or a copy operation component (<from> or <to>). The differences between expressions and queries in 1.1 was clear queries had a context and expressions did not.

This has changed in the WS-BPEL 2.0 spec. Queries still have a context when used as part of propertyAlias but not as part of a copy operation component. Other than the separate configuration of a query language there is no discernable difference between queries and expressions in a WS-BPEL 2.0 process so why have both?

The proposal includes the following changes:

  1. remove queryLanguage from <process>
  2. replace queryLanguage in <to> with expressionLanguage

The propertyAlias will retain its queryLanguage since it provides a context for the query to execute.
Changes: 21 Jul 2006 - new issue

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