Expressions can have multiple languages associated with them; thus a intersection table is needed between this entity and the WiktionaryZ Languages table. However, this is mainly for the purpose of describing the sub-components of a parent Expression, and since these are modeled separately, does this aggregate attribute need to be accurate?
done, need to document that this table should not be used for describing sub-components of an expression
Date of creation can be range of dates
more cartographic attributes for remote-sensing images
