package information file
defines previous (or future) versions of the
package that are compatible with this version.
Each line in the file consists of a string
defining a version of the package with which the
current version is compatible.
Because some packages might require installation of a particular version of
another software package, compatibility information is extremely crucial.
If a package ``A'' requires version ``1.0'' of application
``B'' as a prerequisite, but the customer installing ``A''
has a new and improved version of ``1.3'' of ``B'', the
file for ``B'' must indicate that the new version
is compatible with version ``1.0'' in order for the customer
to install package ``A''.
The string must match the definition of the VERSION
parameter in the
file of the package considered to be compatible.
Here is an example of this file: