In Vault we are now storing a sizeable number of XML files. It would be great if the custom diff tool can be customized per extension. I can then use the supplied diff tool for normal source code and and xml diff tool for the xml files.
(I'm too cheap to buy a super-duper diff tool that can do both! -- although recommendations both free and non-free are certainly welcome)
Feature request: Different diff tool based on extension
Moderator: SourceGear
We use BeyondCompare (www.scootersoftware.com) which can do different sets of rules or plugin viewers based on file extension. I don't know if their "xml rules" cover what you need, but they offer a free trial, and the price is very reasonable, with large discounts for multiple seats.