Record Structure: Alma vs Voyager

The bib-holdings-item record structure of Alma and Voyager differs.

Physical book

Alma	Voyager
Source: Ex Libris Knowledge Center > How does Alma manage inventory control of library holdings?
If multiple copies of a title are shelved in one location, the item records share one holdings record. When a bib has multiple holdings records, each must have a unique string of text in 852.	Each copy has its own holdings record.
List of Holdings
Holdings record 1 of 2 852 0_ $$b firestone $$c stacks $$t 1-2 Item 1 Item 2 Holdings record 2 of 2 852 0_ $$b recap $$c pj $$t 3 Item 3	Holdings record 1 of 3 852 0_ ‡b f ‡t 1 866 _0 ‡z Princeton copy 1 Holdings record 2 of 3 852 0_ ‡b f ‡t 2 866 _0 ‡z Princeton copy 2 Holdings record 3 of 3 852 0_ ‡b rcppj ‡t 3 866 _0 ‡z Princeton copy 3 Item records The Copy ID field in item records may or may not have been edited properly -