Semantic Equivalence

In computer metadata, semantic equivalence is a declaration that two data elements from different vocabularies contain data that has similar meaning.

There are three types of semantic equivalence statements:

• Class or concept equivalence: A statement that two high level concepts have similar or equivalent meaning.
• Property or attribute equivalent: A statement that two properties or attributes have similar or equivalent meaning. Effectively, two descriptors or attributes of classes have similar meaning.
• Instance equivalence: A statement that two instances of data are the same or refer to the same instance.

source: Semantic equivalence - Wikipedia