[Koha-bugs] [Bug 17269] New: Library::CallNumber:: LC does not follow LC standards for Area Subarrangments of cataloged maps

[bugzilla-daemon at bugs.koha-community.org]

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=17269

            Bug ID: 17269
           Summary: Library::CallNumber::LC does not follow LC standards
                    for Area Subarrangments of cataloged maps
 Change sponsored?: ---
           Product: Koha
           Version: master
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P5 - low
         Component: Architecture, internals, and plumbing
          Assignee: gmcharlt at gmail.com
          Reporter: barton at bywatersolutions.com
        QA Contact: testopia at bugs.koha-community.org

Library::CallNumber::LC is used to generate cn_sort for Library of Congress
callnumbers.

According to the LC document "Special Instructions and Tables of Subdivisions
for Cartographic Materials", in the section 'Area Subarrangments'

The document can be found at http://www.loc.gov/catdir/cpso/class_g.pdf; see
page 6:

"Regions and political divisions within a city or town may be classified with
the use of a colon (:) followed by the number 2 or 3, indicating whether the
subdivision is (2) geographic or (3) political and a Cutter number for the
subdivision. Examples:

G4364        California (map city and town number)
.L8:2G7        Los Angeles, Griffith Park (classified as a region)

G4114        Michigan (map city and town number)
.E4:2M4        East Lansing, Michigan State University (classified as a region)

G3804        New York State (map city and town number)
.N4:3Q4        New York City, Queens (classified as a political division)
"

When I use Library::CallNumber::LC::Normalize(), 'G4364 .L8:2G7' and 'G4364
.L8' generate entirely different call numbers:

Library::CallNumber::LC->normalize("G4364 .L8:2G7") 
  => G4364  .L00008:00002G00007

Library::CallNumber::LC->normalize("G4364 .L8")
  => G4364 L8

If I'm reading the Library of Congress instructions instructions correctly, I
believe that "G4364 .L8:2G7" should generate as "G4364 L8:2G7", which would
sort after "G4364 L8", whereas "G4364  .L00008:00002G00007" sorts before "G4364
L8".

I'm also filing a bug with the module maintainer:
https://github.com/libraryhackers/library-callnumber-lc/issues/10

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