..."Relevant: Everything. It might become relevant in the future, thus it's relevant today.
Targeted: As long as we're collecting the info for an investigation that involves a "target" then any info is "targeted" even if that info has nothing to do with the "target."
Incidental: Everything that we collect... er... store that may become "relevant" at some point but isn't now even though it's "targeted." In short: everything.
Inadvertent: Stuff we did on purpose on a massive scale that looks bad when exposed publicly."...
