Comment 2 for bug 1049171

Yes, thanks Jason.

Let me know if you need something formally written up. Do remember it is also a change in the number of digits, although in terms of space the entire number plus prefix the OCLC number takes up, there is no change between the ocn +9 digits and the on+ 10 digits, if I read this correctly. From the message from OCLC this morning:

Format of the OCLC Number
The OCLC Number resides in the MARC 001 field and may also be stored in other fields. The OCLC Number in the 001 field is formatted as follows:

OCLC numbers 1 through 99999999:
• “ocm” prefix
• oclc control number, 8 digits, right justified with leading zeros
• A blank space as the last character
Example: ocm00012345

OCLC numbers 100000000 to 999999999:
• “ocn” prefix
• oclc control number, 9 digits
Example: ocn123456789

OCLC numbers 1000000000 and higher:
• “on” prefix
• oclc control number, 10 or more digits
Example: on1234567890 or on1234567890123

In the 035 field, the OCLC number is usually stored with the prefix (OCoLC) and without the “ocm”, “ocn” or “on” prefixes; for example: (OCoLC)1234567890.