AAS 197, January 2001
Session 116. Virtual Observatory: Data, Services, Tools and Software
Display, Thursday, January 11, 2001, 9:30-4:00pm, Exhibit Hall

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[116.04] Generating Basic Units with XML

J. Gass, E. Shaya, B. Thomas, J. Blackwell (Astronomical Data Center/GSFC-NASA, RITSS), C. Cheung (Astronomical Data Center/GSFC-NASA)

A fundamental characteristic of any scientific data is its physical units. Unit comparisons and conversions are required in order to understand the meaning of the data and whether or not certain operations on the data are meaningful. For example, only data with equivalent units should be merged.

Intelligent query of distributed systems, such as is envisioned for the NVO, will need to integrate or merge data with mixed conventions of units. It would be desirable to provide a standard process to enable machine understanding of units. We present a solution to this problem using XML entities. Our solution features a flexibility to encompass current unit systems, ease of human use, and interoperability (XML/MathML based) between heterogeneous operating systems.

If you would like more information about this abstract, please follow the link to http://tarantella.gsfc.nasa.gov/xml/XDFhome.html. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

The author(s) of this abstract have provided an email address for comments about the abstract: shaya@xfiles.gsfc.nasa.gov

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