Definition: Used to link a newer version or 'snapshot' of a business object (source) to an older version or 'snapshot' of the same business object (target).
\n*Usage:*The identifier of the Act should be the same for both source and target. If the identifiers are distinct, RPLC should be used instead.
\nName from source to target = "modifiesPrior"
\nName from target to source = "modifiesByNew"
\nhttp://terminology.hl7.org/CodeSystem/v3-ActRelationshipType
where concept is-a MOD