Comment 1 for bug 126870

More generically, you should be able to find the PPA based on words in the descriptions of packages published in that PPA. In other cases we have a mechanism to create a concatenated long cached string which is used as a search target (specifically, we have a cache of the descriptions of all binary packages produced by a source package, which is used when searching through source packages, because source packages themselves have no descriptions).

We could do something similar - have a cache in the Archive of all the descriptions of all binary packages published in the archive. This would be crazy-long for full archives but would be reasonable for PPAs as we see them currently (with 5-100 packages in a PPA).