LOCN and DGGS

Hello,

A while ago we had a thread about Open Location Code
<https://lists.w3.org/Archives/Public/public-locadd/2015Aug/0000.html>,
which is an example of a Discrete Global Grid System (DGGS)
<https://en.wikipedia.org/wiki/Discrete_Global_Grid>. There is an OGC
Standards Working Group dedicated to the topic, the DGGS SWG
<http://www.opengeospatial.org/projects/groups/dggsswg>.

I wonder if the Location Core Vocabulary is already equipped to work with
DGGS references. It is imaginable that people will want to use a DGGS code
to identify a location, perhaps as the only way to locate a thing on Earth.
Could such a code be expressed with LOCN?

The most appropriate property for doing that seems to be the geographic
identifier <https://www.w3.org/ns/locn#rdfs:seeAlso>, for which rdfs:seeAlso
is taken to be the appropriate term. So would rdfs:seeAlso be a good way to
refer to a DGGS location? Two questions come to mind:

   1. I have not studied all DGGS, but in the general case I think a DGGS
   reference consists of a code and an indication of a DGGS scheme, which
   is needed to decipher the code. Does that mean a DGGS reference needs
   two semantic elements? Or is it all right to assume that all DGGS
   references can always be expressed as a single URI (e.g. https
   ://map.what3words.com/monorail.section.trespass)?
   2. Will it be obvious to agents looking voor location data that rdf:
   seeAlso can be used for an indication of location? I mean, rdfs:seeAlso
   is also used for other types of relations (I realise that this is actually
   not only about DGGS, but about the discoverability of location
   information in general, where an unspecific term like rdfs:seeAlso is
   used).

So what do you think?

Greetings,
Frans