TWiki> IVOA Web>IvoaSemantics>VOUnits-1_0-Next (revision 1)EditAttach

VOUnits next steps

There are no current plans to develop the VOUnits specification. However this page collects a few minor errata and suggestions for future work, which can be addressed if such plans do eventually emerge.

Below is a note of minor fixes already applied (by Norman)

  • The list of 'deprecated by FITS' terms in Table 2 is slightly ambiguous. I've adjusted the text in the repository version of the standard, to clarify that these 'deprecations' derive from Table 4 in the FITS spec (which actually says they're deprecated by the IAU but doesn't take a position on the matter itself).

  • The besselian and tropical years are not mentioned in that list of FITS-deprecated units -- they appeared by acclaim in the on-list discussions, and so ended up in the VOUnits list. I've removed them from the FITS column in the Unity library (which is what generates the document's Table 2); they're still recognised-but-deprecated in VOUnits.

  • The units 'angstrom' and 'ohm' (as unit names) are correctly spelled with a lowercase initial letter, but in both cases their usual unit symbol is a non-ASCII character, so that their all-ASCII version here must be a word. Following the lead of the FITS and CDS standards, and of SI unit-symbols derived from surnames, and disagreeing with the OGIP standard, we have preferred the initial-capital symbol in VOUnits (thus `Angstrom' as the unit symbol, rather than `angstrom').

See volute commit for the document, and unity commit for the library.

-- NormanGray - 2014-10-27


Edit | Attach | Watch | Print version | History: r4 < r3 < r2 < r1 | Backlinks | Raw View | Raw edit | More topic actions...
Topic revision: r1 - 2014-10-27 - NormanGray
 
This site is powered by the TWiki collaboration platform Powered by Perl This site is powered by the TWiki collaboration platformCopyright © 2008-2024 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding TWiki? Send feedback