Spec that identifies the application specific web resources to which the
 permission pertains. All URLPatterns in the URLPatternSpec are relative to the context path of the deployed web
 application module, and the same URLPattern must not occur more than once in a URLPatternSpec. A null URLPatternSpec
 is translated to the default URLPattern, "/", by the permission constructor. All colons occuring within the
 URLPattern elements of the URLPatternSpec must be represented in escaped encoding as defined in RF