crs has no prefix?

[pvgenuchten]

mcf uses a plain number for crs at

pygeometa/sample.yml

Line 54 in 335e1b8

crs: 4326

this probably assumes the epsg: prefix, but what happens if a crs uses a different prefix? like esri: crs:

wouldn't it be better to allow a prefix, and assume 'epsg:' if none is given (backwards compat)

this actually contradicts the schema, which indicates a full uri as default value

pygeometa/pygeometa/schemas/mcf/core.yaml

Line 250 in 4c20962

default: 'http://www.opengis.net/def/crs/OGC/1.3/CRS84'