Semantic Units of the PREMIS Data Dictionary
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in the OWL Ontology ver. 1 is defined as:
Class Inhibitors 
ObjectProperty hasInhibitors
| Containers | Current | Descendants |
|---|---|---|
| 1 - Object 1.5 - objectCharacteristics | 1.5.6 inhibitors | 1.5.6.1 inhibitorType 1.5.6.2 inhibitorTarget 1.5.6.3 inhibitorKey |
| Semantic unit | 1.5.6 inhibitors |
|---|---|
| Definition | Features of the object that inhibit access, use, or migration. |
| Applicability | Bitstream, File |
| Obligation | Optional |
| Repeatability | Repeatable |
| Rationale | Format information may indicate whether a file is encrypted, but the nature of the encryption also must be recorded, as well as the access key. |
| Data constraint | Container |
| Creation / Maintenance notes | Inhibitors are more likely to be present on an object ingested by the repository than applied by the repository itself. It is hard to detect during ingest if a file is encrypted, but this may be known from the context in which it is ingested. Therefore, information about inhibitors should be supplied as metadata with submitted objects when possible. |