[Korea-chapter] [Consortium] [X3D] minutes from Web3D Korea chapter meeting

[Richard F. Puk]

Hi --

The current draft seems to address all of the problems that I know about. If
not, I need specifics. To answer Mike's question, the SEDRIS-related EDCS
standard specifies codes and labels for standard units based on the SI (ISO
41). The current 3.3 spec provides explicit support for those SI unit
categories used by X3D and allows other SI units to be specified as
metadata. It also allows arbitrary units to be specified. This might be
useful if I am modeling a virtual world (some remote planet for example)
that wants to use its own units.

Please describe those aspects of the current 3.3 specification that are
unclear or need fixing.

  -- Dick

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> -----Original Message-----
> From: consortium-bounces at web3d.org [mailto:consortium-
> bounces at web3d.org] On Behalf Of Michael Aratow
> Sent: Monday, December 07, 2009 9:19 AM
> To: Alan Hudson
> Cc: korea-chapter at web3d.org; Web3D Consortium Members; KAIST-NPS
> collaboration; X3D Graphics member mailing list
> Subject: Re: [Consortium] [X3D] minutes from Web3D Korea chapter
> meeting
> 
> Are there not multiple examples of precedent for the units problem?
> Did
> SEDRIS address this challenge?
> 
> Thanks,
> 
> Mike
> 
> Alan Hudson wrote:
> > Don Brutzman wrote:
> >> 1.  We had a very productive meeting of the Web3D Korea chapter
> >> in Seoul Korea, Monday 7 December
> >>
> >> Attendees:
> >>
> >>     Dr. Myeong Won Lee, Suwon University, Chapter organizer
> >>     Dr. Kwanhee Yoo, Chungbuk National University
> >>     Dr. Hae-Jimn Kim, Korea Standards Association (KSA) and
> >>         ___ University
> >>     Dr. Gun Lee, Electronics and Telecommunication Research
> >>         Institute (ETRI)
> >>     Dr. Byounghyun Yoo, MIT Singapore Alliance
> >>     Pranveer Singh, Korea Advanced Institute of Science and
> >>         Technology (KAIST)
> >>     ___, Chapter secretary
> >>     Dr. Don Brutzman, Naval Postgraduate School (NPS) and
> >>         member Web3D Consortium Board of Directors (BoD)
> >>
> >> Minutes recorded by myself with periodic detailed review by the
> group.
> >>
> >> 2.  Units proposal, Myeong Won Lee
> >>
> >> Dr. Lee showed her classic example with a bacterium and a larger
> >> cell, demonstrated in her Units browser.  This showed that the
> >> concepts can work satisfactorily.  The video of the demo will be
> >> placed online in the Korea Chapter document directory.
> >>
> >> Sh has also made an X3D schema extension to validate the new
> construct,
> >> tested in Eclipse and X3D-Edit.
> >>
> >> There are 2 approaches to Unit grammar checks, details shown in
> slides.
> >> The second approach, which explicitly declares each type of unit
> (rather
> >> than multiple name and value pairs) seems preferable since it will
> >> enable
> >> X3D DTD or Schema checking of valid content.
> >
> >
> >
> > I don't see how specifying a unit name and conversionFactor is any
> > easier to validate then specifying an enumeration value for a unit.
> > Both can be validated by a schema.
> >
> > We want some way to specify an arbitrary units conversion instead of
> > enunciating everything.
> >
> > How about 2 ways to specify this.  One that uses an enum and one that
> > use an arbitrary conversion.  That way we can convert content from
> > other languages that have arbitrary conversions easily.
> >
> > Just a rough concept here
> >
> > ENUMERATED_UNITS Inches
> > FLEXIBLE_UNITS Inches 0.0254
> >
> > Maybe something like that?
> >
> >
> 
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