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Created attachment 1316617 [details]
reading weak/rich deps on RHEL 6

I've put together code that demonstrates that weak/rich deps are readable on RHEL 6 with existing RPM.
As Panu mentioned, it's all about the constants or knowing the IDs if RPM doesn't provide the constants.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:1909