Prov-WD: Use Plates as example for Entity

[Ole Streicher]

Hi Mireille,

the proposed change does not describe *how* plates are modeled as
Entities. They are however good examples of physical Entities that we
obviously want to describe -- IMO the best ones when it comes to data
Entities (which are the main purpose of the standard).

Therefore, they should be mentioned as examples in the introduction.

Best regards

Ole

On 10.07.19 12:04, Mireille LOUYS wrote:
> Hi all,
> 
> I would not go in details about Plates modeled as Entities because it is
> a choice the implementer has to decide when they implement the model on
> their kind of data.
> 
> Photographic Plates with multi-exposures could be modeled as collections
> of entities and in this case the concept of Entity best fits the one of
> an Exposure.
> 
> Just leave it to the description of the implementation, which is
> expected to be published soon .
> 
> Remember, implementation description are companion documents to be
> produced during the PR review period .
> 
> Best , Mireille.
> 
> Le 09/07/2019 à 13:07, Ole Streicher a écrit :
>> Hi again,
>>
>> section 2.2.1 "Entity and Collection classes" defines the entity and
>> lists some examples. It also describes non-digital entities (pg.13):
>>
>> "Though the focus is on digital entities in this document, entities can
>> also refer to devices such as instruments or tools, that may be linked
>> to digital entities."
>>
>> Since the current implementations more focus on the provenance of *data*
>> entities instead the provenance of tools or instruments, it would be
>> useful to bring a relevant example here. For physical entities, this
>> would be photo plates, which are entities in our APPLAUSE provenance
>> implementation. It is also unclear what "that may be linked to digital
>> entities" means.
>>
>> Section 1 "Introduction" also has a (different) list here:
>>
>> "In astronomy, such entities are generally datasets composed of
>> VOTables, FITS files, database tables or files containing values
>> (spectra, light curves), any value, logs, documents, or physical objects
>> such as devices or instruments."
>>
>> Photo plates should be added here as well.
>>
>> Both lists should also be harmonized; one can't write "devices or
>> instruments" in one place, and "devices such as instruments" on the
>> other place. IMO we should restrict this to one data and one non-data
>> example.
>>
>> Best regards
>>
>> Ole
>