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| Paper: |
CAOM-2.0: The Inevitable Evolution of a Data Model |
| Volume: |
461, Astronomical Data Analysis Software and Systems XXI |
| Page: |
339 |
| Authors: |
Dowler, P. |
| Abstract: |
The Common Archive Observation Model (CAOM) is the core data model used across
all collections at the Canadian Astronomy Data Centre (CADC).
This model supports data discovery via web-based user interfaces and
International Virtual Observatory Alliance (IVOA) compliant Table Access
Protocol (Dowler et al. (2011)), Simple Image Access (Tody et al. (2011)), and
Simple Spectral Access (Tody et al. (2008)) web services. We characterise and
serve a broad range of content using CAOM-1.0 (Dowler et al. (2008)): images, spectra,
datacubes, and time-series from thirteen telescopes (both ground- and space-based).
CAOM-1.0 was designed to balance correctness with practicality: it was a data
model that had to work for the existing and anticipated data at CADC. As with
all data models, there are shortcomings: unanticipated structuring of data
that is hard to describe clearly and unnecessary complexity in applications
that consume the metadata from the model. In CAOM-2.0, we are able to
characterise these new data structures, improve the clarity and usefulness of
the model, and retain the practicality that has made CAOM a success within the
CADC architecture. |
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