[glue-wg] Question about multiplicity in GLUE 2.0 Specification

[David Horat]

Hi Paul,

For me it is a pleasure to help with this document. To hold all the errata
that we find, I have created a wiki page at:
http://forge.gridforum.org/sf/wiki/do/viewPage/projects.glue-wg/wiki/GLUE20Errata

We can hold the information here while we discuss it via email before making
a proper errata document.

Regards,
David

On Wed, Mar 25, 2009 at 12:04 PM, Paul Millar <paul.millar at desy.de> wrote:

> Hi David,
>
> Thanks for looking through the document.
>
> On Tuesday 24 March 2009 15:17:16 David Horat wrote:
> > On GLUE 2.0 Specification v. 2.0 from 3rd March 2009, which is the
> latest,
> > I see that the multiplicity field is specified as '*', '0..*' or '1..*'.
>
> Correct.
>
> > I assume that '*' is the same as '0..*' as this is the standard
> convention.
>
> Your assumption is correct; in fact, the term is defined on page 6.
>
> > Anyway it should be good to concrete it for every field and just have
> > either '0..*' or '1..*'. So, is this specification still open for little
> > changes like this?
>
> The two terms '*' and '0..*' refer to the same concept: zero or more items.
> Using two terms for the same concept is an inconsistency in the document,
> which should be fixed.  I guess this should be recorded in some errata
> document (wiki page, etc) initially.  I'm not sure how documents are
> updated
> within OGF.
>
> From a quick scan through the document I found (only) five places where
> '0..*'
> is used, the remainder are '*'.  Also the term '*' is defined whereas
> '0..*'
> isn't.  So to fix the inconsistency we should change the five occurances of
> the '0..*' term to '*'.
>
> That said, I'm also in favour of '0..*' because to me it's meaning is
> clearer
> and is more in keeping with the other term: '1..*'.  I'm not sure how
> others
> feel about changing '*' to '0..*'.
>
> Cheers,
>
> Paul.
>



-- 
David Horat
Software Engineer specialized in Grid and Web technologies
IT Department – Grid Deployment Group
CERN – European Organization for Nuclear Research » Where the web was born
Phone +41 22 76 77996

http://davidhorat.com/
http://cern.ch/horat
http://www.linkedin.com/in/davidhorat
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