A cache redirection policy includes one or more expressions (also called rules). Each expression represents a condition that is evaluated when the client request is compared to the policy.
You do not explicitly configure actions for cache redirection policies. By default, the NetScaler considers any request that matches a policy to be non-cacheable and directs the request to the origin server instead of the cache.
Cache redirection uses the classic policy format, which is described in the Citrix NetScaler Policy Configuration and Reference Guide at http://support.citrix.com/article/CTX128673. Each policy has a name and includes an expression or a set of expressions that are combined by using logical operators.