Schema.org mappings

See https://schema.org/Dataset and https://developers.google.com/search/docs/data-types/dataset

schema.org	required?	BALD
description	required
name	required
citation	recommended
identifier	recommended
keywords	recommended
license	recommended
sameAs	recommended
spatialCoverage	recommended
temporalCoverage	recommended
variableMeasured	recommended
version	recommended
url	recommended