LAC Control Number Structure (016 National Bibliographic Agency Control Number - Structure)
With the redefinition of field 016 in 1997, any national bibliographic agency can record its control numbers in this field. Although the structure of numbers would vary from agency to agency, extensive use of field 016 has been made by Library and Archives Canada. Their control number structure is given below.
The language code (character position 10) identifies, with a code "E" (English) or "F" (French), a bilingual item for which two separate bibliographic records, one in English, the other in French, are produced.
In January 2001, a structural change occurred to accommodate a four digit year.
Pre-Year 2001 Control Number Structure |
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Name of element |
Number of characters |
Character position in field |
Undefined |
1 |
00 |
Year |
2 |
01 - 02 |
Serial number |
6 |
03 - 08 |
Check digit |
1 |
09 |
Language code |
1 |
10 |
Undefined |
1 |
11 |
Revision indicator |
variable |
12 - n |
Control Number Structure for 2001 and Beyond |
||
Name of element |
Number of characters |
Character position in field |
Year |
4 |
00-03 |
Serial number |
6 |
04 - 09 |
Check digit |
1 |
10 |
Language code |
1 |
11 |
Revision indicator |
variable |
12 - n |
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