Semantic Units of the PREMIS Data Dictionary

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in the OWL Ontology ver. 1 is defined as:
FunctionalProperty hasPreservationLevelRole

Semantic unit	1.3.3 preservationLevelRole
Definition	A value indicating the context in which a set of preservation options is applicable.
Applicability	Intellectual Entity / Representation, File
Obligation	Optional
Repeatability	Not repeatable
Rationale	Repositories may assign preservationLevelValues in different contexts which must be differentiated, and may need to record more than one context. This allows a distinction, for example, between the intended preservation level and the current achievable preservation level. Note: This is distinct from the preservationLevelType which distinguishes the purpose of the preservationLevel.
Data constraint	Value should be taken from a controlled  vocabulary. A controlled vocabulary list is available at:
Controlled vocabulary	http://id.loc.gov/vocabulary/preservation/preservationLevelRole.html
Examples	requirement intention capability requirement intention capability