Last modified 17 years ago Last modified on 10/03/05 12:35:34

Karen's Historical Notes

The link to Karen's notes is throwing a server error, so here's what I got from's Wayback Machine.



Rick and I talked about on what level we should describe data: e.g., a
single data set or a collection of data set.

Different data archives organize their data differently. The
searchable unit can be either a single FITS data set or a collection
of them.

One possible senario is to describe data at a level searchable by its
archive, with the archive specific information encaptulated as a field
in the XML meta-data desription to facilitate query
translation. Alternatively, the XML meta-data description can
incorporate the organizational structure of different data archives.


Report on DM from NVO project

UML object-oriented data modeling language


service model: 
  resource registration
  resource discovery

usage scenario
 100 questions for the NVO


GridPP the grid for uk particle physics, useful links to recommended

AML (astromical markup language) Damien Guillaume

Level of service registration:
- entire data archive
- individual data set

What is the pros and cons of either approach? -- plan to read Ninja


What can a data archive do? 
- storage
- basic data search depending on database organization
- data analysis? require computing resources
the first two items already exist. the last item may not.

from the original proposal:
data archive
- geographically distributed
- diversely organized
- provide individually tailored access services

data interoperability: translation among
- data descriptions 
- data format
-> determine the semantics of XML representation

access interoperability: translation among
- different search engines
-> reformulate XML search into source-specific search

The NVO approach:
ask some questions and see what we need to solve these problems 
-> identify service units, perhaps also data models.

Service Discover Service:
hierarchical structure

query distributed video database 

Fri, 24 May 2002 about 11 AM