(r4) Dec2013VOUnitsRFC < IVOA

IVOA Web>IvoaSemantics>VOUnitsRFC>Dec2013VOUnitsRFC (revision 4) (raw view)~~EditAttach~~

---+ VOUnits 1.0 RFC: %RED%2014 January 7 to 2014 February 4%ENDCOLOR%

The [[VOUnitsRFC][last VOUnits RFC]] implied a small collection of document and implementation changes which, it turned out, had consequences more far-reaching than was immediately apparent.  As well, some new participants appeared in the discussion at this point. The result is a set of document and syntax changes which, it has been decided, are substantial enough to warrant a new RFC.

The new version is http://www.ivoa.net/documents/VOUnits/20131224/

The main visible changes in the new version are

   * the appearance of 'quoted units', thus permitting for example =km/'martianDay'= (see the document for discussion; this was the principal syntactic change which ended up necessitating the new version)
   * recognition for unknown functions, so that for example =dBA(ct/s)= includes an unknown function =dBA=; this is explicitly permitted by the standard, though a parser should make available the information that the function is not a recognised one
   * the appearance of binary prefixes (Ki, Mi, ...) on certain units
   * more explicit statements that the indication that units are unknown is the special string =unknown=, and that the indication that a quantity is dimensionless is that the units string is the empty string
   * various textual clarifications to the document.

The editors believe we have accommodated or acknowledged each of the concerns on the original RFC page, either in the document or on that page.  Please feel free to disagree.

We do not believe these are deep changes in principle, so those WG chairs who were happy with the document in its previous incarnation may not need to examine it too closely this time.

Changes are reported in Appendix D of the new version of this proposed recommendation, available below.

Comments from all working groups members are welcome.  Comments should be on this page; discussion should be on the semantics@ivoa.net list.

For comparison, and as a reminder, all comments from the previous iteration are available on the former VOUnitsRFC page.  The previous PR document was [[http://www.ivoa.net/documents/VOUnits/20130724/index.html][1.0-20130724]] (there was also a distributed version [[http://www.ivoa.net/documents/VOUnits/20130922/index.html][PR-1.0.20130922]], and an intermediate Working Group draft, 1.0-20131025, which is attached to this page).  All previous versions are available on the [[http://www.ivoa.net/documents/][IVOA documents page]].

#All WG Review

---++ Comments

---+++ Applications WG (MarkTaylor, PierreFernique)
---+++ Data Access Layer WG (PatrickDowler, FrancoisBonnarel)
---+++ Data Model WG (JesusSalgado, OmarLaurino)
---+++ Grid and Web Sevices WG (AndreSchaaff, AndreasWicenec)
---+++ Registry WG (GretchenGreene, PierreLeSidaner)
---+++ Semantics WG (NormanGray, MireilleLouys)
---+++ Data Curation & Preservation IG (AlbertoAccomazzi, FrancoiseGenova)
---+++ Education IG (MassimoRamella, SudhanshuBarway)
---+++ Knowledge Discovery in Databases IG (GeorgeDjorgovski)
---+++ Theory IG (FranckLePetit, RickWagner)
---+++ Time Domain IG (JohnSwinbank, MikeFitzpatrick)

#TcgReview
---++ Comments from TCG (WG and IG chairs)

<!--
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   * [[%ATTACHURL%/PR-VOUnits-1.0-20131025.pdf][PR-VOUnits-1.0-20131025.pdf]]: Recommendation for Units strings in the virtual Observatory -UPDATE

Attachments

Topic attachments
I	Attachment	History	Action	Size	Date	Who	Comment
pdf	PR-VOUnits-1.0-20131025.pdf	r1	manage	940.9 K	2013-12-05 - 16:53	MireilleLouys	Recommendation for Units strings in the virtual Observatory -UPDATE
pdf	PR-VOUnits-1.0-20131224.pdf	r1	manage	944.2 K	2013-12-24 - 18:29	NormanGray	PR 1.0-20131224

Topic revision: r4 - 2014-01-07 - NormanGray

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