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OpenSolaris 2009.06 - man page for compver (opensolaris section 4)

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 package 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 crucial. Consider, for example, a  package
       called "A" which requires version "1.0" of application "B" as a prerequisite for installa-
       tion. 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 5.11				    4 Oct 1996				       compver(4)


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