How to specify type of rel=describes link?

[na9da]

Hi,

I just wanted to check if there is a suggested approach to more precisely specify the type of a rel: describes link similar to the rel: wms field from STAC web-map-links?

For instance, the following binds to the item's WMS/WFS services but a client that wishes to render these on map will need to guess from the URL what the actual type of the service is and how to request it.

ogcapi-records/core/examples/json/record.json

Lines 300 to 309 in c06b998

	{
	"rel": "describes",
	"title": "OGC Web Map Service (WMS)",
	"href": "https://geo.woudc.org/ows?service=WMS&request=GetCapabilities"
	},
	{
	"rel": "describes",
	"title": "OGC Web Feature Service (WFS)",
	"href": "https://geo.woudc.org/ows?service=WFS&request=GetCapabilities"
	},

An additional attribute describing the service type would make the binding more predictable. I guess the definition of the type values itself is out-of-scope of Records API but is there a suggested attribute name for the type? Eg protocol: wms. Or does it make sense to use the STAC definition rel: wms?

Cheers

[m-mohr]

This is a good question. The web map links extension also needs a rewrite as it has several flaws, so an alignment here between STAC and Records would be great.

[pvretano]

Not sure if this helps but OGC handles this slightly differently using link templates ... see here. There is an example that shows how the link template is used. It does not tell you the "type" (i.e. WMS or WFS) per se but gives you all the information necessary to invoke the referenced service to get a response.

[m-mohr]

A type field would be good to have though. I acknowledge that it's hard to define an enum of types though.