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0XX	Control information, identification and classification numbers, etc.
1XX	Main entries
2XX	Titles and title paragraph (title, edition, imprint)
3XX	Physical description, etc.
4XX	Series statements
5XX	Notes                      →LIS Cafe-Home
6XX	Subject access fields
7XX	Added entries other than subject or series; linking fields
8XX	Series added entries, holdings, etc.
9XX	Reserved for local implementation →LIS Cafe-Home Within the 1XX, 4XX, 6XX, 7XX and 8XX blocks, certain parallels of content designation are usually preserved. The following meanings, with some exceptions, are given to the final two characters of the tag of fields:

X00	Personal names	X40	Bibliographic titles
X10	Corporate names	X50	Topical terms
X11	Meeting names	X51	Geographic names
X30	Uniform titles

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