`module Apt : sig ... end`

Apt command line parsing

`module Architecture : sig ... end`

Debian architecture strings, as described in Section 5.6.8 of the Dbian policy. Compliant with Debian policy version 3.9.2

`module Debcudf : sig ... end`

Debian Specific Cudf conversion routines

`module Debutil : sig ... end`
`module Edsp : sig ... end`

Representation of a apt-get <-> solvers protocol edsp > 0.4

`module Evolution : sig ... end`
`module Packages : sig ... end`
`module Release : sig ... end`

Debian release files. This file format, and its use in apt, is described on http://wiki.debian.org/SecureApt.

`module Sources : sig ... end`

Representation of a parsed source description item. all fields are string