Version 4.1 of the Berkeley DB library. This version uses an incompatible
underlying database format than revision 1 and a different standard API.
Utilities are included in the distribution to convert v1.85 databases to v4.1
databases, and a backwards compatible API is provided to maintain
compatibility with programs using the v1.85 interface.

For details on compatibility with other DB versions, see:
http://www.sleepycat.com/download/patchlogs.shtml
  
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