Re: Improvement of www.schema.org/menu

On Monday, January 16, 2017, Mark Harrison <mark.harrison@cantab.net> wrote:

> 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.
>

Good catch. I guess that makes standarization on unit specifiers all the
more important.


>
> 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
>

.unit=(unitStr/URI, unit system)


>
> 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.
>
>
- Are there mappings from the UN/ECE codes to labels and URIs?
- Are there mappings from the UN/ECE system to QUDT?


>
>
>
>
> On Mon, Jan 16, 2017 at 4:27 PM, Wes Turner <wes.turner@gmail.com
> <javascript:_e(%7B%7D,'cvml','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
>> <javascript:_e(%7B%7D,'cvml','danbri@google.com');>> wrote:
>>
>>> On 15 January 2017 at 07:42, Xavier Gonsalves <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
>>>
>>>
>