Horizon comes with a variety of default MARC maps. Each MARC map is part of a set. Each set has a prefix as part of its code to identify the type of set the MARC map belongs to. Horizon uses these prefixes as a naming convention to help you identify the purpose for each MARC map. You can use the default MARC maps that come with Horizon, or you can create new or change existing MARC maps to suit your library’s needs.
This table identifies some of the more common code prefixes used to identify these sets:
MARC Map Code Prefix |
Type of MARC Maps within the Set |
Example |
S |
Bib-based indexing |
Sjtitle - Journal/Newspaper Title |
X |
Auth-based indexing |
Xauthor - Author |
T |
76x-78x tags |
Tag760 - Subseries |
Z |
Multi-source indexing |
Zutitl - Uniform titles (author) |
N |
Non-indexing |
Ntitle - Title (not indexed) |
D |
Display MARC maps |
Dauthor - Author |
L |
Limit maps |
Lcatso - Cataloging Source |
LZ |
Limit by fixed field |
LZMUco - Music - Form of composition |
lnk |
Linking MARC maps |
lnkmatw - Record control number |
M |
MARC display in staff searching |
M880 - staff searching display of the 880 tag |
You should maintain at least three sets of MARC maps: one for indexing, one for search limiting, and one for display purposes. In addition, you can maintain an additional set for linking if you want to link bib records during import.
You should change existing indexing MARC maps (maps that start with the letter S, X, or Z) with extreme caution and only if you have a thorough knowledge of MARC maps and Horizon indexes—doing so changes the way Horizon indexes records. After you change a MARC map, you must rebuild any index that uses that MARC map. If you have concerns, contact Customer Support to help you change Indexing MARC maps.
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