220.127.116.11.1.5 PidTagRuleProvider Property
Rules that are stored on folders are associated with the application that owns the rules (2) by using a rule provider string. Each client application is to only add, modify or delete rules (2) that it is responsible for.
A client can define its own rule provider string. The value of the string MUST NOT be the same as a rule provider string being used by another client that could be setting rules (2) on the same folder.<2>