======Modelling serials and e-resources======
The following diagram is a suggested remodelling of the basic bib / volume / copy hierarchy to support serials subscriptions and e-resources with MFHD compliance and claiming:

{{acq:serials:serials_model.jpg}}

Legend:

^ Abbreviation ^ Description ^ Table ^
| BRE | Bibliographic record | biblio.record_entry |
| AOU | Org unit | actor.org_unit |
| CN | Call number (aka volume) | asset.call_number |
| CP | Copy (aka item) | asset."copy" |
| MFHD | [[http://www.loc.gov/marc/holdings/echdhome.html|MARC Format for Holdings Data]] | |
| Sub | Subscription (per subscription period, typically annual) | |
| Issuance | Each issue generated by a particular subscription | |
| Summary | Holdings summary statement (updated every time an issuance is created) | |
| URI | Universal resource identifier, typically a URL | |