AS3V
AS3V is an ActionScript 3 Validator. It is a tool to check for syntactical correctness and matches code against a given set of rules.
Code consistency
AS3V will help keeping code consistent by forcing the author to follow coding conventions. The basic set of conventions AS3V will ship with are the Flex SDK Coding Conventions.
You are free to extend the set of AS3V rules with own XPath expressions.