Reference:
Version: 0.1
Author: Mireille Louys- F. Bonnarel
Date: July 10, 2009

Observation DataModel: Core for data query

Prototype

Observation DataModel: Core for data query

# Preliminary specification

## Overview of the application

This is a very preliminary verstion for the Core Obs Model.

Class diagram : Overview of packages used

This is a general View of the Observation DM.
The Core Obs model will use only a subset of the classes required for the
identified Use-cases, but possibly borrow classes from existing packages like
Characterisation or Spectrum( in white).
Colored packages are currently defined in the DM WG and will be developped
in coordination with this core model effort as well.

Class diagram : ObservationDM (1)

Class diagram for the Core Observation Model . In the Characterisation package only the colored classes will be used .

Description of the SSA protocol:
http://www.ivoa.net/Documents/REC/DAL/SSA-20080201.html

## Summary

It contains the following packages:

- Spectrum
- CharacterisationDM
- SpaceTimeCoordinates
- Photometry
- Provenance

It contains the following classes:

- Observation
- Access
- Mapping
- SpatialMapping
- SpectralMapping
- TemporalMapping
- PolarisationMapping
- AmbientConditions
- FITS_WCS

# Use cases

## Description

The defined use cases are:

- Data retrieval UseCases