[infod-wg] minutes INFOD F2F March 30 2005 - minutes INFOD call March 31 2005

[Cecile Madsen]

FYI: Longer note; includes:

1.F2F Meeting minutes Mar 30th: discussion items and to-dos
2.Weekly call minutes Mar 31st


1.INFOD F2F Meeting, at Oracle, on March 30th

Attendees:

Vijay Dialani, Dieter Gawlick, Chris Kantarjiev, Cecile Madsen
Shailendra Mishra, Dmitri Lenkov

Minutes:

* follow-up item from GGF13: reintroduce all of publisher, subscriber,
consumer (identities)
   and publication, subscription, consumption ('artifacts')
      - need for formal definitions (review of existing definitions still
need to be validated, to
        close that issue)

* new use case scenario: support of the 'best' option
      - due to the dynamic nature of publications, publishers, etc., a
subscription
         may need to include information about how to notify consumers of
changes to the
        subscription dependencies (additional publishers, removal of
publishers that occur
        over time, etc.).
      - this includes scenarios where the consumer expects to receive its
messages from the 'best'
        publisher (given some properties) and thus also includes cases
where a choice needs to be
        made between multiple publishers.
      - a similar discussion applies to interfaces other than subscription,
but subscription is the most
        critical one: for ex, allow publishers to pick the 'best'
Disseminator.

* new drawing: the 'INFOD cloud'
      - delimited by Disseminators, which define boundary between outside
and inside the cloud
      - a cloud is defined by a 'Registration manager' (assume 1-1
relationship)
      - Publishers and Consumers are identities outside the cloud.
      - Picture to be sent by Vijay to the infod group. Dieter to include
it in specs (first sections)

* Understanding WS-Eventing relationship with WSN
      - fyis for the INFOD group. Susan will follow-up.

* Complex Event Processing at Disseminator: an example of consumption

* follow-up from GGF13: decomposing Interfaces, for easier consumption by
the community;
   3 levels/stages were proposed:
      - level 1: deliver interfaces for publisher, consumer and operations
for scenarios
         with 0 or 1 disseminator - should be similar to wsn scenarios -
      - level 2: add operational characteristics as needed for propagation
(suppport
        scenarios with 2 Disseminators)
      - level 3: full support of all operational characteristics (for ex,
choice of Disseminators,
        strategy of propagation, etc.)

   It is understood that the line between level 2 and level 3 is blurry.
   More work needed to further clarify it.

* INFOD and Vocabularies - presentation by Dmitry Lenkov
      - Ontologies needed: support scenarios where subscription vocabulary
         is different from publisher's. Mapping of semantics needed.
      - Mapping is not in the INFOD scope but a service needed by INFOD.
         It's a 'black box': INFOD needs to know what is expected from it
to make use of it.
        The more function it will deliver, the more function INFOD will be
able to take
        advantage of.
      - Vocabularies available: sql99, xpath/xml/xquery, rdf/sparcle/owl,
cim, ...
         but no agreed upon standards yet
      - INFOD scenarios a good use case for Vocabularies standards group
(Vijay to follow-up)

* INFOD and Identities - briefly discussed
      - also a black box from INFOD perspective
      - important difference is that standards exist for Identities that
INFOD can make use of now

* Propagation - Shailendra Mishra
      - includes both topology support (directed network explicitly by
users or optimized scenarios
        where system itself generates subscriptions between Disseminators)
and scheduling functions
        (only propagate when time is 'right')
      - policies for propagation are to be defined and included in specs
(Shailendra)
      - dynamic information needs to be queried and updated to support
efficient propagation
        (need to calculate probability that data gets to a particular
Disseminator)
            - Registration manager doesn't contain dynamic data, so keep it
somewhere else
            - this topic leads to network provisioning and end-end quality
of service requirements

* WSDL/UML demo - Vijay
      - Vijay stepped thru installation/demo of Rational Tooling
      - we'll have to first generate the wsdl (and will then get the UML)

* Next Steps/To-Dos:
      - Dieter to get the 'cloud picture' and integrate in the first
sections of the specs doc
      - Vijay to work on security/access mechanims in INFOD
      - Vijay to follow-up with Vocabulary Mgmt work (INFOD a use-case for
that standards' work)
      - Shailendra to provide list of propagation policies
      - Cecile to start with factoring of level 1 (see above) - draft of an
Appendix describing a light
         weight interface for simple scenarios a la wsn
      - Dieter and Cecile to review the level 2/level 3 factoring,
differentiation
      - Chris to generate wsdl from existing interfaces - feedback to
Cecile on 'holes' that may still
         exist in specs
      - Open items (to be worked on after above items have progressed):
         1. investigate interaction between the interfaces and 'black
boxes' described above
         2. investigate support for 'best' functionality described above,
for subscription interface


2.INFOD Call  March 31th

Attendees:
Vijay Dialani, Dieter Gawlick, Chris Kantarjiev, Steve FisherSusan Malaika,
Cecile Madsen

Minutes:

* recap of F2F the day before (see 1st part of this note)

* status of use case scenarios from Susan, Steve
      - finalizing which scenarios to use
      - will contact Arjun Shankar for addt scenario
      - reviewing options: ogsa template or something else

* next F2F meeting in Oxford
      - Interested parties to contact Steve Fisher ASAP

Next call: 9AM Thursday April 7th

INFOD group
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