How are versioned weak dependencies handled?  Can I "Suggests"/"Recommends" min and max versions or can I only supply the main package and use "Conflicts" to enforce version ranges?

For example:

    Suggests: pkg >= 1.0
    Suggests: pkg < 2.0

or

    Suggests: pkg
    Conflicts: pkg < 1.0
    Conflicts: pkg >= 2.0