The Sheldon Brown website may also be a good resource. Perhaps not in tables of interchange capability, but more along the lines of, "Here's how to determine what capacity rear derailleur you need", and then you can look up specs for given RDs to find what you need. They have more info than most about rear cog spacing and doing adaptations to meet your needs. Chainline is critical, and they have articles on how to measure and calculate at the cogs, and at the chainrings. Bottom bracket spindle tapers has an especially good section on compatibility, as well as shell threading standards. There or elsewhere if you search, there will be some place that has tables and specs on various other bottom bracket bearing types, both threaded and press fit, there are many standards now.