So, we provide a "ballpark" range through the DestinyInventoryItemDefinitions - the "minimum" and "maximum" values in the "stats" property, as well as within the "sources" property which tries to break it down by level and quality. The unfortunate problem is that these can never be 100% accurate - partially because the number of actual combinations is so staggering that the Items database would inflate to unusable size if we were to list every permutation, and partially because there are things that can happen to actual instances of items that we cannot account for on a definition level (for example, infusing). We do have a backlog item to try and provide you "valid combinations" of possibilities - for example, some items give you either: STR + INT *or* INT + DISCIPLINE *or* .... And right now we just show you the overall mins and maxes without regard to these combinations. I'd like to expose this, but we've got a large backlog of higher priority tasks to get to before we get to it unfortunately. Stay tuned here though, you'll hear it here first if we end up returning that extra data!