Semantic Units of the PREMIS Data Dictionary
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in the OWL Ontology ver. 1 is defined as:
Class FormatRegistry 
FunctionalProperty hasFormatRegistry
FunctionalProperty hasFormatRegistryRole
| Containers | Current |
|---|---|
| 1 - Object 1.5 - objectCharacteristics 1.5.4 - format 1.5.4.2 - formatRegistry | 1.5.4.2.3 formatRegistryRole |
| Semantic unit | 1.5.4.2.3 formatRegistryRole |
|---|---|
| Definition | The purpose or expected use of the registry. |
| Applicability | Bitstream, File |
| Obligation | Optional |
| Repeatability | Not repeatable |
| Rationale | The same format may be defined in different registries for different purposes. For example, one registry may give detailed format specifications while another has profile information \/ information about software support and dependencies. If multiple registries are recorded, this semantic unit can be used to distinguish among them. |
| Data constraint | Value should be taken from a controlled vocabulary. A controlled vocabulary is available at: |
| Controlled vocabulary | http://id.loc.gov/vocabulary/preservation/formatRegistryRole.html |
| Examples | Specification Validation profile Specification Validation profile |