data layer source code is available from the repository by a link in my signature. The data layer should be fully upgradable from previous versions.
Beginning with this 1.9.6 RC 1 source code for PostgreSql
and YAF is available too.
Keep in mind that the source code is not supported, though I fix bugs and optimize it when I have time.
The data layers are a third-party application from me and are not an official part of YAF.
Edited by user
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