Semantic Units of the PREMIS Data Dictionary
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in the OWL Ontology ver. 1 is defined as:
FunctionalProperty hasSignatureMethod 
| Containers | Current |
|---|---|
| 1 - Object 1.8 - signatureInformation 1.8.1 - signature | 1.8.1.3 signatureMethod |
| Semantic unit | 1.8.1.3 signatureMethod |
|---|---|
| Definition | A designation for the encryption and hash algorithms used for signature generation. |
| Applicability | Bitstream, File |
| Obligation | Mandatory |
| Repeatability | Not repeatable |
| Rationale | The same algorithms must be used for signature validation. |
| Data constraint | Value should be taken from a controlled vocabulary. A controlled vocabulary is available at: |
| Controlled vocabulary | http://id.loc.gov/vocabulary/preservation/signatureMethod.html |
| Usage notes | Recommended practice is to use the following naming convention: name the encryption algorithm first, followed by a hyphen, followed by the name of the hash (message digest) algorithm. |
| Examples | DSA-SHA1 RSA-SHA1 DSA-SHA1 RSA-SHA1 |