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How does Aleph sort items in the OPAC?

Aleph is sorting item records for books differently from serials. Non-issue items (like books) are sorted by sub-library, and then by item-sequence.

For serials, it goes further takes into account the details of the chron & the enum . (These details are essentially meaningless for books.)

The sort identifiers for non "issue" items (eg monographs, dvds) :
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sort by location (using sublibrary), then sequence
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sub_library+
item-sequence

The sort identifiers for "issue" items:
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sort by numbering, ignores location, reverses enum b/c
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if chronological-i(year) is spaces and
enumeration-a(volume) is spaces then
description+
item-sequence.
if chronological-i(year) not spaces then
chronological-i(year)+
enumeration-a(volume)+
enumeration-c(part)+
enumeration-b(issue)+
item-sequence

For illustration purposes on Stage (right at this moment), this is what Aleph is using to sort Fieldiana Zoology [000594931] :

Seq: 10
TYPE ISSUE
SORT 2011 0000031

Seq: 20
TYPE ISSUE
SORT 0000051 00000050000007

Seq: 30
TYPE ISSUE
SORT 1999 0000059 0000002

Seq: 40
IN 000594931000040
TYPE NON ISSUE
SORT 0000053 0000003 v.53, no.3 (1968) CCSCI

Seq: 50
TYPE NON ISSUE
SORT 0000055 0000001 v.55, no.1 (1968) CCSCI

Please feel free to experiment on Stage with this title to develop the recommended workflows that work best for your library.