On Sat, Jun 16, 2018 at 2:37 AM, Michael Kuhn <m...@adminkuhn.ch> wrote:
> > Dewey Decimal Classification uses characters that indeed do look like > Arabic numbers (standing for classes, divisions, sections), but these > characters do not behave like numbers, so the correct sorting is actually > not as you would expect (namely seen from the right to left) > > 1 > 2 > 11 > 21 > 100 > 230 > > but (and thus seen from left to right) > > 1 > 100 > 11 > 2 > 21 > 230 > > Hope this helps. > > That's' not the way I understand it. The Dewey classes: 000 – Computer science, information & general works 100 – Philosophy and psychology 200 – Religion 300 – Social sciences 400 – Language 500 – Pure Science 600 – Technology 700 – Arts & recreation 800 – Literature 900 – History & geography 000 is sub-divided into the hundreds group 000 Computer science, knowledge & systems 010 Bibliographies 020 Library & information sciences 030 Encyclopedias & books of facts 040 [Unassigned] 050 Magazines, journals & serials 060 Associations, organizations & museums 070 News media, journalism & publishing 080 Quotations 090 Manuscripts & rare books and then sub-divided again into the thousands groups... 000 Computer science, information & general works 001 Knowledge 002 The book 003 Systems 004 Data processing & computer science 005 Computer programming, programs & data 006 Special computer methods 007 [Unassigned] 008 [Unassigned] 009 [Unassigned] ...and then sub-divisions of the thousands are done after the decimal point -- 001.1, 001.2, etc... as such, I don't think that callnumber 1.1 is a valid DDC number... it lacks the class and hundred-level group, and should, for the purposes of cn_sort, be converted to 001_100000000000000. (Numbers above are taken from https://www.oclc.org/content/dam/oclc/dewey/DDC%2023_Summaries.pdf).
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