Following structures are used to represent informations returned from Aleph.
str – Identity of base where this record is stored.
str – Library string, used for downloading documents from Aleph when you know proper docNumber.
str – Identificator in Aleph. It is not that much unique as it could be, but with
librarystring, you can fetch documents from Aleph if you know this.
str – MARC XML source returned from Aleph. Quite complicated stuff.