RE: Improvement of www.schema.org/menu

Ø  Sorry to be pedantic ;-)

That’s not pedantry. Its accuracy. Important.

From: scenicviews.org@gmail.com [mailto:scenicviews.org@gmail.com] On Behalf Of Mark Harrison
Sent: Tuesday, 17 January, 2017 03:58
To: Wes Turner <wes.turner@gmail.com>
Cc: Dan Brickley <danbri@google.com>; Xavier Gonsalves <axv4444@gmail.com>; schema.org Mailing List <public-schemaorg@w3.org>; W3C Web Schemas Task Force <public-vocabs@w3.org>
Subject: Re: Improvement of www.schema.org/menu

Sorry to be pedantic ;-) , but in fact, the SI base unit for mass is the kilogram.
See
https://en.wikipedia.org/wiki/International_System_of_Units#Base_units and http://physics.nist.gov/Pubs/SP330/sp330.pdf (section 2.1.1.2) and
http://www.bipm.org/en/publications/si-brochure/kilogram.html


The gram is the base unit for mass in the old CGS system - but not in the modern SI system.

QUDT will be more useful and more complete when version 2.0 is finally released - and has very useful machine-readable triples for expressing the dimension of each unit (is it a mass, a length, etc.) and conversion factors and offsets between units that belong to the same physical dimension (e.g. to convert between various units of mass or between various units of length).

In GS1 and the GS1 web vocabulary, for the value of http://gs1.org/voc/unitCode we use a string value indicating a Measurement Unit from UN/ECE Recommendation 20 code tables, e.g. GRM for gram, KGM for Kilogram, MGM for milligram and MC for microgram.  A 2005 edition of the code tables is available at http://www.unece.org/fileadmin/DAM/cefact/recommendations/rec20/rec20_rev3_Annex3e.pdf


Personally, I'd much prefer the QUDT approach but industry does currently use the UN/ECE Rec 20 code tables for expressing units of measure, even if some of these UN ECE code strings are completely opaque and non-intuitive, e.g. 28 = kilogram per square metre.





On Mon, Jan 16, 2017 at 4:27 PM, Wes Turner <wes.turner@gmail.com<mailto:wes.turner@gmail.com>> wrote:
http://schema.org/NutritionInformation


http://schema.org/servingSize r: Text
"The serving size, in terms of the number of volume or mass"

Other NutritionInformation attributes have a r:ange of Mass.

- Does this suggest a need for a Volume class?
- Could/should the servingSize range be Quantity?

- Should Quantity have a 'unit' property with r: URL?
  http://schema.org/Quantity


  - QUDT defines URLs for many (powers of) physical units
    - Unfortunately, there are a number of vocabularies for physical units
  - The SI unit for Mass is always g(ram)

...

https://wrdrd.com/docs/consulting/units#rdf-and-units


https://wrdrd.com/docs/consulting/linkedreproducibility#csv-csvw-and-metadata-rows ... "Table with 7 metadata header rows"

On Monday, January 16, 2017, Dan Brickley <danbri@google.com<mailto:danbri@google.com>> wrote:
On 15 January 2017 at 07:42, Xavier Gonsalves <axv4444@gmail.com<mailto:axv4444@gmail.com>> wrote:
> Many have talked and requested about this but w3 seems to avoid it.



> Schema should add more properties under restaurant menus like dish price,
> cuisine, spiciness, dish name, ingredients, veg, nonveg, vegan category,
> description .etc.. so that search engines can implement the following in the
> future:
>
> https://searchenginewatch.com/sew/news/2328869/google-tests-restaurant-menus-in-card-results/

>
> It can be ordered such that these properties can be put on the webpage of
> the URL of the menu.
>
> Please look into it ASAP.

Please comment on the draft at http://webschemas.org/MenuItem in
Github, https://github.com/schemaorg/schemaorg/issues/1288


Dan