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Subject: RE: [wsbpel] Issue 11 - Proposal For Vote
I would better understand your position if you were also proposing to
remove the "copy" operation from the language.
Why leave a "copy" operation with grossly crippled functionality?
Ugo
> -----Original Message-----
> From: Satish Thatte [mailto:satisht@microsoft.com]
> Sent: Sunday, April 03, 2005 10:06 PM
> To: Ugo Corda; ygoland@bea.com
> Cc: wsbpel@lists.oasis-open.org
> Subject: RE: [wsbpel] Issue 11 - Proposal For Vote
>
>
> Regardless of language, I still don't understand why it is
> useful to add a small subset of the DOM API in BPEL statement
> form. While I understand the desire for completeness, we
> need to recognize that BPEL is in fact not a complete
> language. This seems to me like a (very) partial solution to
> the problem of XML data manipulation in processes, which in
> fact is outside our scope and hence its solution is best left
> outside the language. Web service invocations already act as
> completely general XML transducers in principle and we will
> have enough extensibility to invent new transducers using
> other technologies.
>
> ________________________________
>
> From: Ugo Corda [mailto:UCorda@SeeBeyond.com]
> Sent: Thu 3/31/2005 2:37 PM
> To: ygoland@bea.com
> Cc: wsbpel@lists.oasis-open.org
> Subject: RE: [wsbpel] Issue 11 - Proposal For Vote
>
>
>
> Well, let's look, for example, at the latest version of this
> section 14.3 paragraph (from the resolution to issue 103):
>
> "The from-spec and to-spec MUST yield a node-set that
> contains exactly one node. If the from-spec or to-spec
> selects zero nodes or more than one node during execution,
> then the standard fault bpws:selectionFailure MUST be thrown
> by a compliant implementation".
>
> I don't see any generic infoset terminology in that paragraph either.
>
> Ugo
>
> > -----Original Message-----
> > From: Yaron Y. Goland [mailto:ygoland@bea.com]
> > Sent: Thursday, March 31, 2005 1:53 PM
> > To: Ugo Corda
> > Cc: wsbpel@lists.oasis-open.org
> > Subject: Re: [wsbpel] Issue 11 - Proposal For Vote
> >
> >
> > This proposal does not use infoset terminology. In fact,
> the proposal
> > looks to be XPATH specific. Defining issue 11 in terms of XPATH
> > semantics would mean that the issue 11 features could change in
> > functionality based on which expression languages were used as the
> > source or destination. Minimally a proposal to resolve this issue
> > should be written using generic infoset terminology so that issue 11
> > behavior
> > will be consistent regardless of expression language.
> >
> > Thanks,
> >
> > Yaron
> >
> > Ugo Corda wrote:
> > > I have been working on a resolution of this issue with a few TC
> > > members who are interested in a type of resolution like the
> > one that
> > > Danny presented a few months ago. Please find our current
> proposal
> > > attached.
> > >
> > > Regards,
> > > Ugo
> > >
> > >
> > >
> > >
> >
> ----------------------------------------------------------------------
> > > --
> > >
> > >
> > > Issue 11 - Proposal
> > >
> > >
> > > 1. Append
> > >
> > > Syntax:
> > > <bpel:assign>
> > > <bpel:append>
> > > <bpel:from ... />
> > > <bpel:to ... />
> > > </bpel:append>
> > > </bpel:assign>
> > >
> > > The from-spec within <append> yields a single node or a
> > node set. Note
> > > that the
> > > from-spec of <bpel:copy> still MUST yield ONLY one node.
> > The node set will be
> > > processed in document order (unless an alternative order is
> > specified in the
> > > underlying query language). If the from-spec yields atomic
> > values (e.g.
> > > numbers), those atomic values can be converted to text
> > nodes, when needed. If
> > > the from-spec yields zero node, "bpel:selectionFailure"
> > fault MUST be thrown. If
> > > the from-spec yields an attribute node, then
> > "bpel:selectionFailure" fault MUST
> > > be thrown.
> > >
> > > {{ Background context note on XPath 1.0 and XSLT 1.0: the
> > selected set
> > > of nodes
> > > by XPath 1.0 in XSLT 1.0 is processed in document order.
> > Hence, it is feasible
> > > and natural to process the nodes selected by the from-spec
> > in the document order
> > > in <append> and other similar XML data operations. For
> > details, please see
> > > section 5.4 in [XSLT1.0] specification. }}
> > >
> > > The to-spec MUST yield one single element node as the
> > target element
> > > node.
> > > Otherwise, "bpel:selectionFailure" fault will be generated.
> > The to-spec cannot
> > > refer to a partnerLink. The node-set returned by the
> > from-spec will be appended
> > > orderly as child nodes to the target element node.
> > >
> > >
> > > 2. Insert
> > >
> > >
> > > 2.1 insertBefore
> > >
> > > Syntax:
> > > <bpel:assign>
> > > <bpel:insertBefore>
> > > <bpel:from ... />
> > > <bpel:to ... />
> > > </bpel:insertBefore>
> > > </bpel:assign>
> > >
> > > The restriction and semantics of from-spec under insertBefore is
> > > similar to those in the case of <bpel:append>.
> > >
> > > The to-spec under <insertBefore> MUST points to one or more
> > nodes. If
> > > more than
> > > one nodes are returned, the first node will be used as the
> > reference node. The
> > > word "first" here means respect to the order of the node
> > set selected by
> > > to-spec, which is by default in document order, unless an
> > alternative order is
> > > specified in the underlying query language.
> > >
> > > The reference node MUST be an element node. The parent of the
> > > reference node MUST be an element node also. Otherwise,
> > "bpel:selectionFailure" fault will be
> > > generated. The to-spec cannot refer to a partnerLink.
> > >
> > > The node set generated by the from-spec will be inserted
> before the
> > > reference node in the document order (unless an
> alternative order is
> > specified in the
> > > underlying query language).
> > >
> > >
> > > 2.2 insertAfter
> > >
> > >
> > > Syntax:
> > > <bpel:assign>
> > > <bpel:insertAfter>
> > > <bpel:from ... />
> > > <bpel:to ... />
> > > </bpel:insertAfter>
> > > </bpel:assign>
> > >
> > > <insertAfter> is very similar to <insertBefore>. Except:
> > >
> > > * If more than one nodes are returned by the to-spec,
> > the last node will be
> > > used as the reference node. The word "last" here
> > means respect to the
> > > order of the node set selected by to-spec, which is
> > by default in document
> > > order, unless an alternative order is specified in
> > the underlying query
> > > language.
> > > * Instead of inserting nodes before the reference node,
> > the nodes selected
> > > by will be inserted after the reference node in the
> > document order (unless
> > > an alternative order is specified in the underlying
> > query language).
> > > * This operation can also be considered a macro of
> > conditional-switch +
> > > (append or insertBefore).
> > >
> > >
> > > 3. Remove
> > >
> > > Syntax:
> > > <bpel:assign>
> > > <bpel:remove>
> > > <bpel:target ... />
> > > </bpel:append>
> > > </bpel:assign>
> > >
> > > The syntax of "bpel:target" is similar to and a subset of
> > to-spec used
> > > in <copy>
> > > with the "partnerLink" attribute removed. Similarly, XPath
> > 1.0 is used as the
> > > default query language for <target>-spec.
> > >
> > > This <remove> operation remove nodes specified by the
> <target>-spec
> > > from their parent nodes. Nodes specified by <target>-spec MAY be
> > multiple. Nodes being
> > > removed can be: text nodes, attribute nodes and element nodes.
> > >
> > > If the <target>-spec returns zero node, then
> > "bpel:selectionFailure"
> > > fault MUST
> > > be thrown.
> > >
> > >
> > > Reference:
> > >
> > > * [XSLT1.0] http://www.w3.org/TR/xslt
> > >
> > >
> > >
> > > [date: 2005-03-30]
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> >
> ----------------------------------------------------------------------
> > > --
> > >
> > >
> >
> ---------------------------------------------------------------------
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> > > For additional commands, e-mail: wsbpel-help@lists.oasis-open.org
> >
> >
>
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