This is a first attempt to see how the various components of NDG may actually be deployed as a working service - please add / change

Components of NDG

• Discovery
• MOLES browse
• DX
• GeoSPlAT
• Vocabulary/term Server
• Delivery Service

Core NDG Services – run by “NDG”

• Discovery web service
  • GUI interface to discovery
  • Runs on SuperGlue?
• MOLES Browse web service
  • BNL thinks not ... this should be a DP thing ...
• Term server
  • Runs on a BODC system

Documentation:

• Configuration

“Central” Dx / GeoSPlAT GUI??

• BNL thinks not ... ... this is a service binding issue really, which dx service is bound to a data object by default should be the "local" one ... but a dx ought to be able to take a uri, and use it anyway ... but that would involve the delivery service ...

Data provider

There are a number of levels of data provider engagement ... beginning with simply providing data behind a delivery service and/or simply providing a directory of data objects available. A full NDG data provider will provide the entire set of services.

Data Provider - Discovery

• Generate D ( how: a full partner will do it from MOLES, others will do it how they like )
• Maintain D in OAI repository
• Make OAI repository

Required Software:

• Dlese database
• For discovery alone there is no requirement for NDG security.

Tools:

Schema:

• D: currently DIF, soon to be ISO19139. Need to consider which flavour(s).

Documentation:

Useful stuff:

• Example D from a variety of sources
• Code repository for generation of DIFs from MySQL / Oracle etc BNL don't think this is the way to go
• HMS - Code repository for generation of DIF from MOLES instead?

How do you get at data found in repository if DP is not also a full data provider?

Data provider – MOLES

• Generate MOLES records
• Maintain MOLES records (in what? Does it matter? BNL: in exist, yes it matters, to deploy browse software need to have it in exist)

Required Software:

• NDG security – all or subset? Just role mapping? Anything?

Tools:

Schema:

• MOLES
• StubB

Documentation:

Useful stuff:

• Example MOLES - of all types from different data centres
• Code repository for generation of MOLES from CSML / standard data formats

Some Questions

• How do you get at data found in MOLES if DP is not also a full data provider?
• Do you have to be discovery provider if you’re a MOLES provider?

Data Provider – Data Server

• Generate CSML instances
• Serve CSML instances to required services
• Deliver Data – by DX and/or simple file access?

Required Software:

• NDG security

Tools:

• CSML Scanner
• CSML Parser

Documentation:

Useful stuff:

• example CSML for a variety of sources

Some Questions

• Do you have to be Discovery and / or MOLES to be full data provider in NDG?
• Do you have to run a local DX to be a full data provider

Data provider – local DX & GeoSPlAT

Required Software:

Tools:

Schema:

Documentation:

Useful stuff:

Data Provider – portal/GUI

• Discovery portal – integrate a discovery search widget into your own data web page
• Browse portal – run a browse interface with your own branding

Required Software:

Tools:

Schema:

Documentation:

Useful stuff: