sunos man page for compver

compver(4)							   File Formats 							compver(4)

NAME
       compver - compatible versions file

DESCRIPTION
       compver	is an ASCII file used to specify previous versions of the associated package which are upward compatible. It is created by a pack-
       age developer.

       Each line of the file specifies a previous version of the associated package with which the current version is backward compatible.

       Since some packages may require installation of a specific version of another software package, compatibility information is extremely cru-
       cial.  Consider,  for  example, a package called "A" which requires version "1.0" of application "B" as a prerequisite for installation. If
       the customer installing "A" has a newer version of "B" (version 1.3), the compver file for "B" must indicate that "1.3" is compatible  with
       version "1.0" in order for the customer to install package "A".

EXAMPLES
       Example 1: Sample compver file.

       A sample compver file is shown below:

       Version 1.3
       Version 1.0

SEE ALSO
       pkginfo(4)

       Application Packaging Developer's Guide

NOTES
       The  comparison	of  the  version  string disregards white space and tabs. It is performed on a word-by-word basis. Thus, "Version 1.3" and
       "Version 1.3" would be considered the same.

       The entries in the compver file must match the values assigned to the VERSION parameter in the pkginfo(4) files.

SunOS 5.10							    4 Oct 1996								compver(4)