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| Oai | Implements controller for the OAI-PMH service: - checks OAI-PMH requests correctness, - handles OAI-PMH `identify` and `ListMetadataFormats` commands - delegates OAI-PMH `GetRecord`, `ListIdentifiers` and `ListRecords` commands to a chosen class implementing the `acdhOeaw\oai\search\SearchInterface` - delegates OAI-PMH `ListSets` command to a chosen class extending the `acdhOeaw\oai\set\SetInterface` class. |
| OaiException | Simple specialized exception class to easy distinguish between OAI-PMH and internal exceptions. |