RE: [wsbpel] Issue - 90 - Proposal to vote

["Kristofer Agren" <kagren@pakalert.com>]

By using an XPath function, unless the BPEL implementation can thoroughly
validate the XPath expressions, you loose the benefit of static analysis and
the business process may fail at run time, for example because the external
document is not valid or the location may be wrong. 

Regards,

Kristofer

-----Original Message-----
From: Edwin Khodabakchian [mailto:edwink@collaxa.com] 
Sent: Monday, April 26, 2004 3:25 PM
To: 'Martin Chapman'; 'Dieter Koenig1'; 'Kristofer Agren'
Cc: wsbpel@lists.oasis-open.org
Subject: RE: [wsbpel] Issue - 90 - Proposal to vote

+1. Specially given that it is fairly straight forward to create an XPATH
function to emulate this functionality. -Edwin

-----Original Message-----
From: Martin Chapman [mailto:martin.chapman@oracle.com] 
Sent: Monday, April 26, 2004 10:55 AM
To: 'Dieter Koenig1'; 'Kristofer Agren'
Cc: wsbpel@lists.oasis-open.org
Subject: RE: [wsbpel] Issue - 90 - Proposal to vote

+1

>-----Original Message-----
>From: Dieter Koenig1 [mailto:dieterkoenig@de.ibm.com] 
>Sent: 26 April 2004 08:46
>To: Kristofer Agren
>Cc: wsbpel@lists.oasis-open.org
>Subject: Re: [wsbpel] Issue - 90 - Proposal to vote
>
>
>
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>
>Kristofer, the use case for having an external document that 
>is part of the business process is not clear to me. Why is 
>this not a literal residing inside of the process definition. 
>In addition, such document references would create a new 
>problem as I see no obvious way of recognizing changes of the 
>external artifacts. Kind Regards DK
>
>
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>             "Kristofer Agren"                                 
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>             <kagren@pakalert.                                 
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>             23.04.2004 04:49                                  
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>                                       [wsbpel] Issue - 90 - 
>Proposal to   
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>Hello all,
>
>Here is a proposal to vote for issue 90 (
>http://www.choreology.com/external/WS_BPEL_issues_list.html#Issue90):
>
>-----------------
>Proposed solution:
>
>Introduce a new form of the <from> element:
>
><from location="document-location" query="queryString"?/>
>
>The query attribute has the same semantics as the normal query 
>attribute on the <from> element, i.e. it must be an absolute 
>location path and select exactly one node. If no query is 
>specified, the root node of the XML document is selected. The 
>document-location is a URL (as defined in RFC
>2396) that refers to an XML document, and in the case that the 
>XML document is not valid and/or a single node cannot be 
>returned, a selectionFailure fault should be thrown by a 
>compliant implementation. The document that is retrieved from 
>the URL is considered static in the same way the business 
>process definition is considered static during execution. 
>Furthermore, the external document is considered part of the 
>business processes that reference it, and conversely, the 
>business process definition should not be considered complete 
>or valid without the external document. A change in the 
>external document should be treated in the same way as a 
>change in the business process definition.
>
>This <from> form can be used in conjunction with all the <to> forms.
>-----------------
>
>Regards,
>
>Kristofer Agren
>


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