Understanding opkg handling of package configurations

[Shaz]

Dear all,

Apt works on top of dpkg and dpkg utilizes the file system (/var/lib/
dpkg/) to maintain its cache/configurations.
Opkg should be working on top of ipkg but as far as my analysis it is
not so and neither does opkg use any configurations or cache on the
file system. Also read somewhere that opkg is a fork of ipkg, which
means that it does not depend on ipkg.

Please point out how it manages to take care of configurations for
install, update, remove and preinst, postinst etc?