Some time ago, there was a big discussion on the Debian mailing lists about the preferred documentation format in Debian. The discussion showed clearly that people have very different opinions on that topic and thus, we'll have to implement a flexible solution.
    The doc-base package tries to implement
    such a flexible solution: every Debian package that provides online
    documentation (other than manual pages) will register these documents to
    doc-base via the
    install-docs script (see Section 2.4, “Registering Documents With doc-base”) at installation time and de-register the
    manuals again when the package is removed.
  
    Since all manuals will eventually be registered, doc-base can also be used to solve another
    outstanding problem: Debian currently has four different online documentation
    systems,
    doc-central,
    dwww,
    dochelp,
    and dhelp.
    Each system has advantages and
    disadvantages; thus doc-base supports
    all of them.  The system administrator can choose which implementation he/she
    prefers.