Semantic Units of the PREMIS Data Dictionary
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in the OWL Ontology ver. 1 is defined as:
ObjectProperty hasSignatureEncoding 
| Containers | Current |
|---|---|
| 1 - Object 1.8 - signatureInformation 1.8.1 - signature | 1.8.1.1 signatureEncoding |
| Semantic unit | 1.8.1.1 signatureEncoding |
|---|---|
| Definition | The encoding used for the values of signatureValue, keyInformation. |
| Applicability | Bitstream, File |
| Obligation | Mandatory |
| Repeatability | Not repeatable |
| Rationale | The values of signatureValue and keyInformation cannot be interpreted correctly if the encoding is unknown. |
| Data constraint | Value should be taken from a controlled vocabulary. A controlled vocabulary is available at: |
| Controlled vocabulary | http://id.loc.gov/vocabulary/preservation/signatureEncoding.html |
| Examples | Base64 Ds:CrytoBinary Base64 Ds:CrytoBinary |