Index rules table

Indexing: Interpreting the Index Rules table

Different III implementation consultants will use slightly different patterns in writing the instructions for MARC tags and subfields, since more than one technique or expression can be used to achieve the same result. For examle, if a field contains 5 subfields (a,b,c,d,e) either of these will do the same thing: KEEP acd or REM be.

Examples lines from an Index Rules table

line no.	III field group and tag	MARC tag	subfields to keep or remove when indexing	index
	FIELD NAME	MARC TAG	SUBFIELDS
002 >	MISC NO.(l)	010	KEEP ALL	OTHER #(i)
006 >	ISBN/ISSN(i)	020	EACH a	OTHER #(i)
028 >	CLASS #(c)	092	KEEP ALL	DEWEY CLASS #(m)
029 >	CLASS #(c)	096	KEEP ALL	L.C. CLASS #(c)
030 >	AUTHOR(a)	100	KEEP abcdq	AUTHOR(a)
031 >	AUTHOR(a)	100	KEEP fglnopst	TITLE(t)
032 >	AUTHOR(a)	100	KEEP krv	KEYWORD(W)
065 >	NOTE(n)	505	REM 6	KEYWORD(W)
104 >	SUBJECT(d)	65[0-4].[12345678]	REM 6	SUBJECT (OTHER)(f)
105 >	SUBJECT(d)	650.[ 0]	REM 6w	SUBJECT (L.C.)(d)
106 >	SUBJECT(d)	650.2	REM 236e	MESH(j)

Notes

These instructions that tell Summit which subfields to index are not related to instructions regarding which subfields display in the public catalog.
Different parts of a field can be sent to different indexes (see AUTHOR lines 030, 031, 032; different parts go to the Author, the Title, and the Keyword indexes)
Fields from different INNOPAC tag groups can be indexed in the same index (see line 002 and 006 above; these fields with tags for MISC.NO. and ISBN/ISSN are both indexed in the Other # index)

Interpreting the column "MARC tag"

For the purposes of indexing, the MARC tag has 5 characters: the first three are the MARC tag, the next two are the indicator values. A dot is a placeholder, it won't matter what's in that position. For example, 400.0 means MARC tag 400 with a 2nd indicator 0, and it doesn't matter what's in the first indicator position - it could be no value, blank, or some other character.
Numbers in brackets are read as "or" so that any of those numbers would be allowed in that position.
Numbers may be expressed as a range, using a hyphen.
A blank has meaning.

Different parts of one MARC field go to different indexes

058 >	SERIES(s)	400.0	KEEP abcd	AUTHOR(a)
059 >	SERIES(s)	400.0	KEEP fgklptv	TITLE(t)
060 >	SERIES(s)	400	KEEP fnptvq	KEYWORD(W)

MARC tag 400 when 2nd indicator is 0 (400.0): Subfields a,b,c,d go to Author index.

MARC tag 400 when 2nd indicator is 0: Subfields f,g,k,l,p,t,v go to Title index.

MARC tag 400, all fields without regard for indicator: Subfields f,n,p,t,v go to Keyword index.

A blank has meaning

650.[ 0]

Summit looks for MARC tag 650 when the 2nd indicator is either blank or 0. These are subject headings from Library of Congress (indicator value 0), or older subject headings with a blank instead of a specific value.

Notice the difference in this example. Summit will send certain subfields of a 600 with 2nd indicator blank or 0 or 2 to the LC subject index, but will send certain subfields of 600 to the MESH index only when the 2nd indicator is 0 or 2.

096 > SUBJECT(d) 600.[ 02] REM 6w SUBJECT (L.C.)(d)
097 > SUBJECT(d) 600.[02] REM 2346euw MESH(j)

Number range

65[0-4]

[0-4] means any number between and including 0 through 4. So this line means: MARC tag 650 or 651 or 652 or 653 or 654.

Brackets

Numbers in brackets are read as "or" so that any of those numbers would be allowed in that position. Two examples:

133 >	RELATED TO(q)	76[0257]	REM hmwxy7	KEYWORD(W)
	Summit looks for MARC tag 760 or 762 or 765 or 767.
104 >	SUBJECT(d)	65[0-4].[12345678]	REM 6 SUBJECT	(OTHER)(f)
	Summit looks for MARC tag 650 or 651 or 652 or 653 or 654, with 2nd indicator of 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8.

updated: October 3, 2006