All reports of usr-share-doc-symlink-to-foreign-package for the archive. The extended description of this tag is:
If the package installs a symbolic link /usr/share/doc/pkg1 -> pkg2, then pkg1 and pkg2 must both come from the same source package.
The best solution is probably to stop symlinking the /usr/share/doc directory for this package and instead include a real /usr/share/doc/pkg1 directory within pkg1 with the appropriate contents (such as the copyright and changelog.Debian.gz files).
Refer to Debian Policy Manual section 12.5 (Copyright information) for details.
Severity: serious, Certainty: certain
Check: debian/copyright, Type: source, binary
This tag has not been emitted in any package tested by Lintian.