Quantity Data Model Work Package

Background Material

• Ray's Presentation at InterOpMay2003DataModel:
  • Slides: powerpoint, HTML
  • XML Schema: VOQuantity.xsd
  • A VOQuantity Metadata Dictionary generated directly from the XSD file using an XSL stylesheet.
• See discussion on dm mail archive with Subject starting with [QUANTITY]
• AIPS++ resources:
  • Tool Reference Manual: follow links to the quanta and measures modules
  • AIPS++ Note 223: Guide to Measures in C++
• Fowler-based approaches (from Gerard Lemson)
  • http://www.martinfowler.com/ap2/quantity.html
  • http://www.cbop.gr.jp/dl/semi/000208/000208_martin02.pdf
  • http://www.joeyoder.com/Research/metadata/Observation/observationmodel.pdf
• Data Models for Spectra: Abstractions for Quantities and Coordinates, by Steve Lowe and Jonathan McDowell
• Ideas on units, by Jonathan McDowell

Modeling Materials