The mechanisms used to define policy definition are one of the most important things to consider when evaluating a data loss prevention technology.
Amazingly, only about 25% of prospective customers cross-examine DLP vendors on this topic. That’s a big mistake. Ask your vendor to provide a demo. Then take some policies you’ll need to implement, see how you implement them with the product, and run a series of tests against it to see how well the definitions are performing.