Edited sentence: Classification of climbs can vary quite a bit depending on location and history.For example, although The Trough at Tahquitz was originally the standard for 5.0, the 2001 edition of the standard guidebook rates it as 5.4.Guidebooks have often raised the ratings on older climbs to make them more comparable to newer ratings.Indoor gym ratings tend to be much higher ("softer," inflated) compared to outdoor ratings.Ratings tend to be lower ("old school" or "sandbagged") in outdoor areas where climbing routes were developed earlier