[SAGA-RG] SAGA Information System Navigator

[antony.wilson at stfc.ac.uk]

As discussed at OGF29 we are considering proposing an "Information
System Navigator" (ISN) API as a further extension to SAGA.

This API has been designed to add value to the org.ogf.saga.sd package.
Having selected a service with the org.ogf.saga.sd.Discoverer API, this
API provides the means to traverse the information model and retrieve
additional data published about that service. Alternatively it is
possible to start with a selected entity type rather than a service. An
optional filter can be used to restrict the results returned.

This API can be used to navigate any information system that can be
represented as an entity relationship model.

An implementation of this API along with a gLite adapter have very
recently been deployed on WLCG.

See the user guides and javadoc linked from:
http://hepunx.rl.ac.uk/egee/sa3-uk/sd/ to see details of the API.

We have built a web application on top of the SD and ISN APIs, which
allows you to navigate around the GLUE 1 and GLUE 2 information models.
Our test server can be found here http://rgma03.pp.rl.ac.uk/InfoBrowser/


Having gained experience from producing the implementation and adapter
we propose to formalise this as a
specification document that we will put forward as an extension to SAGA.
Is this something that people would like to see go ahead?


Regards
Antony and Steve
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