LOCODE Identifiers for countries

[Fak3]

Currently locode identifiers of countries have this structure:
https://service.unece.org/trade/uncefact/vocabulary/unlocode-au/#AU
https://service.unece.org/trade/uncefact/vocabulary/unlocode-ru/#RU

Notice the duplication of two-letter code in the full url. This is a bit of nuisance for humans. In the json-ld data payload the most radable way to reference some country is to use just two letters, potentially prefixed, like this: unlocode:AU. While the current full url structure would require to use unlocode:au/#AU

Another drawbavck is that it is not possible to get the list of all country identifiers on single well-known page. The linked-data way suggests that you should be able to dereference https://service.unece.org/trade/uncefact/vocabulary/unlocode to get a list.

We could adjust our hierarchy of unlocode http namespaces to address the issues mentioned above.

[AP-G]

I think this issue must be solved in alignment to #11. Without a no final solution for that issue, the others cannot be solved finally as well.

[Fak3]

Related to #34

[VladimirAlexiev]

Related:

• use # or / rather than /#  uncefact/spec-jsonld#25 : /# is not good, use just one separator
• UN LOCODE namespaces uncefact/spec-jsonld#27 : similar: there should be just one namespace unlocode not split by country: unlocode_au
• use ontologically meaningful classes uncefact/spec-jsonld#29 : this class is not very meaningful semantically