From the Data Architecture glossary:
        Data sink: A data resource that receives the data copied by a data transfer mechanism from a source.
        Data Source: A data resource that contains the data to be copied to a sink via a data transfer mechanism.
Informally, Data Architecture, and DMI for that matter, use these terms to denote the end points of a data transfer operation.

A data resource is defined as:
        An entity (and its associated framework) that provides a data access mechanism or can act as a source or sink.
(This is what currently on Grid Forge but source/sink really mean data source/sink).

So, a data resource is the "thing" that both holds data and provides mechanisms for accessing its contents.

Think of a data resource as something like a relational database or a file system as we have had for decades while the Data Architecture defines interfaces (services) that "front" a data resource, making it a participant in the service oriented architecture being defined by OGSA.

Allen Luniewski
IBM Cross Brand Services
IBM Silicon Valley Laboratory
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San Jose, CA 95141

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guru prasad <guru_bn@yahoo.com>
Sent by: ogsa-wg-bounces@ogf.org

07/05/2007 10:54 AM

To
Mario Antonioletti <mario@epcc.ed.ac.uk>, Dave Berry <daveb@nesc.ac.uk>
cc
ogsa-d-wg@ogf.org, ogsa-wg <ogsa-wg@ogf.org>
Subject
Re: [ogsa-wg] [OGSA-D-WG] Definition of "data service"





This brings me to this question: What is the difference between and data source and a data resource?

Is former just the container for data and latter is responsible for managing one or more data sources?

Mario Antonioletti <mario@epcc.ed.ac.uk> wrote:

Hi,

> Currently we're looking at something like the following:
>
> A service that exposes the capabilities or data of one or more
> data resources within a service-oriented architecture.

I think it should be "the capabilities and data" as opposed to "or".
Similarly for the definition below. However, I think the one above
is more succinct and thus gets my vote.

> or
>
> A service that exposes the capabilities of one or more data
> resources within a service-oriented architecture. These capabilities
> might include data access, data transfer or data management.

Mario

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