WSD WG Attributes Task Force
9 Jun 2003
Attendees
Present:
Steve Graham GGF Philippe Le Hégaret W3CJonathan Marsh WSD Chair (Microsoft)
William Vambenepe Hewlett-Packard Umit Yalcinalp Oracle David Snelling GGF Regrets:
Chair: Steve Graham
Scribe: Philippe
Contents
- Previous Minutes
- Review of Action Items
- Presentation of
ServiceData
- Next Steps
- Summary of Action Items
<Philippe> Participants: Steve, William, Philippe, Dave
<sgg2> Dave's name
is David Snelling, co-chair of the OGSI working group
in GGF
<Philippe> http://www.w3.org/2003/Talks/0609-ogsi-serviceData/
Previous
Minutes:
http://lists.w3.org/Archives/Public/public-ws-desc-state/2003Jun/att-0006/minutes-06-03.htm
... (minutes approved)
Review of Action Items:
... 2003-06-02: Steve to check
IP restrictions with OGSI
Steve:
... the
chairman, chairman of the GGF, agreed to post a message to the mailing list.
... GGF does not have IP claims.
... Steve will follow-up with the chairman to make
sure this happens
... *done*
... 2003-06-02: Steve to find a CORBA IDL expert
Steve:
...
Jeffrey Frey (IBM) will make the presentation on Corba
attributes
... Umit
might have a Corba expert and bring him to the call
as well
... *done*
... 2003-06-02: Steve to get requirements from OGSI
... *ongoing*
... 2003-06-02: William to get requirements from the management prospective
... *ongoing*
Presentation of ServiceData:
------------------------------
... http://www.w3.org/2003/Talks/0609-ogsi-serviceData/
... http://www.w3.org/2003/Talks/0609-ogsi-serviceData/slide2-0.html
... [...]
... http://www.w3.org/2003/Talks/0609-ogsi-serviceData/slide3-0.html
... http://www.w3.org/2003/Talks/0609-ogsi-serviceData/slide4-0.html
... William: is there a machine
readable to know dynamic state data elements or is it only at runtime?
... Steve: only at runtime.
... ... you would need some extensions to describe them.
... Steve: there is a way to say
that a data element is nillable. another
technic for time constraints, ...
... nillable -> no value (data element is not
available)
... Dave: you can also use minOccurs
... http://www.w3.org/2003/Talks/0609-ogsi-serviceData/slide5-0.html
... example of querying accross multiple data
elements
... http://www.w3.org/2003/Talks/0609-ogsi-serviceData/slide6-0.html
... (gwsdl is an interim solution, waiting for WSDL
1.2)
... http://www.w3.org/2003/Talks/0609-ogsi-serviceData/slide7-0.html
... http://www.w3.org/2003/Talks/0609-ogsi-serviceData/slide8-0.html
... Jonathan: how do I get the XML
back? is it a message?
... Steve: yes...
... Jonathan: if I want to receive
them over a particular binding, how does it work? at
the communication level, can you distinguish service data and operations?
... Steve: you map them to
operations in fact.
... ... the way it comes back is a property of the binding.
... Jonathan: "why can't you
just use operations to do this?"
... Steve: cf
slide 20
... http://www.w3.org/2003/Talks/0609-ogsi-serviceData/slide20-0.html
... William: with this solution, you
won't know what are the state attributes.
... Umit: you would need extra metadata.
... Jonathan: yes, you can do that
in schema for example.
... Steve: the tf
will help finding the best solution...
... Jonathan: if we just want to
have a get/set and a list of properties. it is kind of
similar to wsdl as a whole.
... if we were only using REST, we would only use 4
operations. here, we just want predefined get/set.
... Steve: the query system is one
of the best benefits to me.
... if it is not model in the interface, we need to
understand where that should be model then
... agree that it seems an incongruity...
... http://www.w3.org/2003/Talks/0609-ogsi-serviceData/slide9-0.html
... http://www.w3.org/2003/Talks/0609-ogsi-serviceData/slide10-0.html
... extendable: the set of values will grow...
... mutable: the set of values can change each time
... http://www.w3.org/2003/Talks/0609-ogsi-serviceData/slide11-0.html
... http://www.w3.org/2003/Talks/0609-ogsi-serviceData/slide12-0.html
... find serviceData on interface and serviceData names
... Umit: pretty much like properties and
values.
... Steve: you can model
relationship between service data elements
... Steve: in OGSI
, we have the notion of grid service reference, and your service data
element are typed as such.
... (cf locator, factoryLocator
ServiceData element in OGSI GridService porttype)
... http://www.w3.org/2003/Talks/0609-ogsi-serviceData/slide13-0.html
... http://www.w3.org/2003/Talks/0609-ogsi-serviceData/slide14-0.html
... within OGSI, all services implement the grid
service portType.
... Philippe: cannot map findServiceData cannot be mapped to HTTP GEt because it takes an expression
... for attributes, you would like to set attributes using http post, and get
them using http post
... http://www.w3.org/2003/Talks/0609-ogsi-serviceData/slide15-0.html
... Steve: you would need an xpath expression to do advanced query (<80 and > 60)
... didn't make it in OGSI 1.0
... http://www.w3.org/2003/Talks/0609-ogsi-serviceData/slide16-0.html
... http://www.w3.org/2003/Talks/0609-ogsi-serviceData/slide17-0.html
... http://www.w3.org/2003/Talks/0609-ogsi-serviceData/slide18-0.html
... William: slide 18 is just an
example, i.e. not part of the proposal?
... Steve: correct
... ---
Next
Steps:
... requirements
from management
... next week: requirements or webDAV
... (William will try to get the requirements by Wednesday)
... [meeting adjourned]
Summary of
Action Items
No new action items taken.
$Date: 2002/02/19