July 2005 - graap-wg - lists.ogf.org

Telecon. today
by Jim Pruyne 27 Jul '05

27 Jul '05

There will be a telecon today. Usual time (in about half an hour) and numbers: Start Time: 10:00 AM Central US 11:00 AM Eastern US 8:00 AM Pacific US 1700 Germany 1600 UK Midnight Japan Dial in numbers: 866-673-8466 or 702-477-6031 code 8578310. Sorry for the late reminder/confirmation. --- Jim

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Fw: Alternative Approach to Templates and Constraints
by Heiko Ludwig 22 Jul '05

22 Jul '05

Dear GRAAP members, Karl and I had some email discussion since the Wednesday phone call to resolve the template issue. We agreed that both of our more complex proposals are not well enough throught through at the moment and it would be best to stick to a minimal solution, going only slightly beyond what we have in the 1 comments round draft: - A template contains an offer prototype and the creation contraints. - Creation constrains contain a set of items, each of which -- has a location as an XPath -- may have a simpleRestriction (as we had it) or a complex type restriction ( because it's easy) or any#other content to be interpreted as constraint in its domain. This gives us a good standard template functionality and enough space for experimental approaches to templates sitting on top of this standard and potentially being included in the next revision of WS-Agreement. Furthermore, the proposal is easy to implement. If you have comments on this speak up now. I will start changing the schema and text of the spec correspondingly next week. Heiko ----- Heiko Ludwig, Dr. rer. pol. IBM TJ Watson Research Center, PO Box 704, Yorktown, NY, 10598 hludwig(a)us.ibm.com, tel. +1 914 784 7160, mob. +1 646 675 8469 http://www.research.ibm.com/people/h/hludwig/ ----- Forwarded by Heiko Ludwig/Watson/IBM on 07/22/2005 10:29 AM ----- Karl Czajkowski <karlcz(a)univa.com> 07/21/2005 11:28 PM To Heiko Ludwig/Watson/IBM@IBMUS cc Subject Re: Alternative Approach to Templates and Constraints OK. I also wonder if some experiments might be better off in a separate RP from template, but I think the extension idea below is reasonable for "fine tuning" of the model in some domains. Should the Location be fixed to XPath or handled via extensions, e.g. make the normative idiom something like <wsag:Item> <wsag:Location> <wsagext:XPath>/some/path/string</wsagext:XPath> </Location> ? (I made it wsagext so it could go in an any##other defined in the wsag namespace.) karl On Jul 21, Heiko Ludwig modulated: ... > - We keep the existing model of pointers in XPath. Current content is > default. > - Constraint in: > 1. simpleRestriction, the way we have now. that's our minimum. > 2. complexType, because it is the same than simpleRestrictions > and one can identify the root > any#other for experimenting. > > As for the standard, 1 and 2 only apply to existing locations. The > location can be interpreted differently otherwise. > > This way we can keep our proven model, don't have much extension and > implementations can be easily adapted. We also understand the limits. > With the additional any#other we are open for whatever comes to our > minds. > > I hope we can agree on this. > > Heiko -- Karl Czajkowski karlcz(a)univa.com

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Fw: Call today?
by Heiko Ludwig 21 Jul '05

21 Jul '05

Let's use this number for today, as Jim cannot make it. Toll-free dial-in: 1-877-421-0025 Toll dial-in: 1-770-615-1242 Participant passcode: 598600 Heiko ----- Heiko Ludwig, Dr. rer. pol. IBM TJ Watson Research Center, PO Box 704, Yorktown, NY, 10598 hludwig(a)us.ibm.com, tel. +1 914 784 7160, mob. +1 646 675 8469 http://www.research.ibm.com/people/h/hludwig/ ----- Forwarded by Heiko Ludwig/Watson/IBM on 07/20/2005 11:17 AM ----- Heiko Ludwig/Watson/IBM wrote on 07/20/2005 11:05:25 AM: > The call is not activated. Is there a call right now? > > Heiko > > ----- > Heiko Ludwig, Dr. rer. pol. > IBM TJ Watson Research Center, PO Box 704, Yorktown, NY, 10598 > hludwig(a)us.ibm.com, tel. +1 914 784 7160, mob. +1 646 675 8469 > http://www.research.ibm.com/people/h/hludwig/ >

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Re: Fw: Complex Constraints, our call today
by Heiko Ludwig 21 Jul '05

21 Jul '05

Dear GRAAP members, one of the last open issues for the next release of our spec was the semantics of compositors and the use of templates. There were some concerns about using compositors on a template as well as offer/agreement level, potentially introducing semantic ambiguity as to who must or can exercise options. After some discussion since the last call, Toshi, karl and I propose the following, to be discussed in today's call: 1. Compositors have agreement offer-level semantics only. They are not to be interpreted as choices of the initiator. 2. To express more flexibility, we propose to extend the CreationConstraints as follows: Add an attribute "mode" to Location that can be "insert" or "replace". If the value is set to replace, have another attribute "before" with values of positive integers and "end". With those instruments in addition to complex types in creation contraints we can express, for example, the following: ... <wsag:ServiceDescriptionTerm> <ns1:docroot> <ns1:fieldA>myfixedvalue</ns1:fieldB> <ns1:fieldB>default value</ns1:fieldB> </ns1:docroot> </wsag:ServiceDescriptionTerm> ... <CreationConstraints> <Item name="i1"> <Location mode="replace">//ns1:fieldB<Location> <xsd:restriction base="xsd:string"> <xsd:enumeration value="foo"/> <xsd:enumeration value="bar"/> </xsd:restriction> </Item> <Item name="i2"> <Location mode="insert" before="end">//ns1:docroot<Location> <xsd:sequence maxOccurs="128"> <xsd:element ref="ns1:fieldC"/> // You could inline a more complex element here. <xsd:choice minOccurs="0"> // To any fieldB element, we can add more arbitrary input, e.g., file names etc. <xs:element ref=wsgram:FileStageIn minOccurs=0 maxOccurs=unbounded/> </xsd:choice> </xsd:sequence> </Item> </CreationConstraints> Using the added expressivness of the Location element, we can deal with zero or more cardinalities. I propose to use schema for associating the occurrance of one element (fieldC) with another (fieldC). You cannot express this in either the Infoset notation nor the compositors. This way, we achieve a pretty powerful composition semantics, do not replicate expressivness covered by schema and don't need template-level compositors. Talk to you at 11 EST, Heiko ----- Heiko Ludwig, Dr. rer. pol. IBM TJ Watson Research Center, PO Box 704, Yorktown, NY, 10598 hludwig(a)us.ibm.com, tel. +1 914 784 7160, mob. +1 646 675 8469 http://www.research.ibm.com/people/h/hludwig/

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Call today?
by Heiko Ludwig 20 Jul '05

20 Jul '05

The call is not activated. Is there a call right now? Heiko ----- Heiko Ludwig, Dr. rer. pol. IBM TJ Watson Research Center, PO Box 704, Yorktown, NY, 10598 hludwig(a)us.ibm.com, tel. +1 914 784 7160, mob. +1 646 675 8469 http://www.research.ibm.com/people/h/hludwig/

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FYI, WS-Agreement Ontology at U of Georgia
by Heiko Ludwig 19 Jul '05

19 Jul '05

Dear GRAAP members, FYI, I just learned about this WS-Agreement ontology: http://lsdis.cs.uga.edu/projects/meteor-s/modulePages/index.php?page=2 It's interesting to browse. It is part of the Meteor-S project going on at the LSDIS Lab at U. of Georgia, under Amit Sheth: http://lsdis.cs.uga.edu/projects/meteor-s/ Heiko ----- Heiko Ludwig, Dr. rer. pol. IBM TJ Watson Research Center, PO Box 704, Yorktown, NY, 10598 hludwig(a)us.ibm.com, tel. +1 914 784 7160, mob. +1 646 675 8469 http://www.research.ibm.com/people/h/hludwig/

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teleconference on 7/13
by Jim Pruyne 19 Jul '05

19 Jul '05

All, We'll resume our teleconference schedule this week. The times and numbers will be the same as usual: Start Time: 10:00 AM Central US 11:00 AM Eastern US 8:00 AM Pacific US 1700 Germany 1600 UK Midnight Japan Dial in numbers: 866-673-8466 or 702-477-6031 code 8578310. My hope is to re-visit some of the issues raised during our "status" session at GGF, and define a plan for completing the spec. I'd also be interested to hear what people's opinions of GGF14 were. Thanks. --- Jim

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no telecon on 7/6
by Jim Pruyne 06 Jul '05

06 Jul '05

Folks, I'm assuming that most of you are like me, and are still catching up after the week at GGF and the 4th holiday here in the US. So, I'm cancelling our call on the 6th, and we'll resume at the usual time on the 13th. --- Jim

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