The Ohio State University

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OUTLINE
I. Call number fields

1. Difference between 050 and 090 fields
2. Sub-fields and punctuation issues

II. Subject Heading fields

1. Types of Subject Headings
2. LC Subject Headings and “quasi-LC Subject Headings”
3. Subfields

III. Correlation
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I. Call number fields

• At OSUL, we assign call numbers according to the Library of Congress Call Number (LCC) system
• In a MARC record, there are two kinds of call number fields for LCC: 050 and 090
• The 050 field is for call numbers assigned either directly by Library of Congress catalogers or someone else on the level of assigning a LC Call number. When we create new record, we do not use the 050 field, instead, we use the 090 field.
• The 090 field is for “locally assigned LC-type call number,” which means call numbers assigned by us according to LCC.

In copy-cataloging

• when you find a record that (1) has only a 050 call number and (2) the form of that call number agrees with our local practice, accept that 050 field. This call number will be the call number we use for shelving.
• at time when you find a record that (1) has only a 050 call number but (2) the form of that call number does not agree with our local practice, leave the 050 field alone, add a 090 field and put there the call number modified according to our local practice. For instance, if you see
  050 _ _ DS912.382.C48 $b C47 2007 $b Z54
  leave it alone, and add a 090 field following it, your record will look like this:
  050 _ _ DS912.382.C48 $b C47 2007 $b Z54
  090 _ _ DS912.382.C48 $b C47 2007
• By default, the OPAC system (i.e. OSCAR) will automatically select the call number in the second call number field!

II. Subject Heading fields

The 6xx fields are used to provide subject heading(s). We follow the Library of Congress Subject Heading system (LCSH). Therefore, we can only use subject headings that are found on LCSH.

• 650 field: Used for subject heading of topics
• 651 field: Regions and countries as subject headings
• 600 field: Personal names used as subject headings
• etc.

To provide something out of LCSH
— We can provide a personal name in vernacular script;
— Sometimes, we want to provide a topic that is beyond LCSH.

• Use the second indicator 4 approach.
  Examples,
  xxx
• Use the 653 field to index terms that are uncontrolled.
  Examples,
  xxxx

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III. Classification (Call number) and Subject Heading Correlation

• We can assign more than one Subject Headings for a single publication. Totally, we can have 6 Subject Headings in a bib record.
• The Classification is correlated with the first Subject Heading. In other words, we usually assign a call number according to the first Subject Heading on a bib record.
• Therefore, if a bib record has more than one Subject Heading fields, the first one should contain the major Subject Heading assigned for the publication. And the call number is determined by that Subject Heading.
• In case if a work treats two subjects eaqually, the subject comes first will be the first Subject Heading.
  For instance, if a book is titled
  “Modern Mathematics and Western Philosophy,”
  put mathematics in the first Subject Heading field, provide secondary headings for western philosophy, and assign a call number for modern mathematics.
• EXCEPTION. We do not have to assign Subject Headings for a fiction. In other words, a bib record made for a fiction may only have a call number.