[infod-wg] Fw: Terms for addition to Glossary.

Wed Sep 21 18:33:46 CDT 2005

Comments in bold green below.

Thks,
Cecile

Cecile Madsen
Websphere II Replication,  DB2 II Replication,  DB2 DataPropagator
IBM Silicon Valley Lab
(408) 463 2578
madsen at us.ibm.com

             Chris Kantarjiev                                              
             <chris.kantarjiev                                             
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                                       [infod-wg] Fw: Terms for addition   
             09/21/2005 03:08          to Glossary.                        
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FYI. Also Can you post it to infod list?
Regards,
Vijay
(Sorry, I missed that this was only to me until just now!)

Vijay Dialani wrote:

Hi All,
Please find the additions to glossary. Once approved the terms will be
updated to the document.
Regards,
Vijay

Publisher        A content provider that advertises and publishes its
contents in accordance to the subscription rules.

Consumer        A recipient of published contents. The contents are
obtained as a result of evaluation of a subscription against a single or
multiple publications.

Subscriber        An intermediary used to establish and control (typo) the
flow of publications (by means of subscription rules) - between a
publisher/set of publishers and a consumer.
      -> We got rid of 'publications' in the specs...

Broker        A message routing intermediary for publishers and consumers,
used for match making the list of publication types and subscriptions.
            -> we got rid of publication types in the specs...
            -> don't we want to call this 'disseminator' ?

Propagator        A component that retains (manages ?) publications
produced for a subscription. It also provides the access mechanism for a
deferred consumption.
            ->... purpose of retaining publications: ensure target data
rules are satisfied (consistency, etc.)

Continuous Query        Unlike normal queries that evaluate the state as of
a snapshot in time, continuous queries evaluate the expression for a period
of time. Continuous queries produce incremental results as the data becomes
available.

Pushing        A propagation mechanism in which the communication is
initiated by the publisher of data/publications.

Pulling        A propagation mechanism in which the communication is
initiated by the consumer of data/publications.

Polling        A propagation mechanism in which the consumer/publisher
initiates the communication to validate the “state” of the recipients.

Action        In Event-Condition-Action paradigm, an action denotes the
declarative statement that needs to be executed when a certain condition is
met by the published event.
      -> do we still need this ?

Event Correlation
Content        A content based correlation verifies a prescribed condition
against the contents of two messages produced either by the same publisher
or different publishers.

Event Correlation
Creation        A correlation that verifies a prescribed condition against
the publication types of two or more publications/messages.

Type System        An enumeration that defines the list of acceptable value
domains, their value ranges and binary representation in a digital system.

Language        A common shared expression list used to specify a list of
principles (tokens) and the operations permitted on these tokens.

Registry        A repository of resource advertisement used primarily for
match making between resource providers and resource consumers.

History        A persistent and temporal record of previously encountered
publications/messages.

Latest queries        A causally ordered list of most recent queries
processed by the entity.

Mediation        A match making mechanism used for filtering resource
advertisements in accordance to resource queries.
            -> filtering and augmenting (look up, transforms, etc.)

Primary and Secondary Producers: Where is it used in the document?
            -> if i remember correctly, secondary producers were introduced
for the equivalent of wsn publishers: they only publish to a disseminator,
never to consumers.

Profile(typo)        Resource description of an entity.

Demand Driven Publishing  A publication mechanism in which publications are
made available only if there exists a set of consumers for that
publication.

Targeted Publishing        A publication mechanism in which a publisher
commences to publish the contents in response to demand from consumers.

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