Last updated 29 September 2012. Created on 22 August 2008.
Edited by forestmars, mitchell, fago, klausi. Log in to edit this page.

Rules builds upon on its own API, which allows contributed modules to provide

  • default rules, fixed or customizable
  • further rule sets, fixed or customizable
  • actions, which may be configurable
  • conditions, which may also be configurable
  • new events, for which conditions and actions can be configured
  • new input evaluators (like token and PHP input evaluators)
  • new rules data types
  • user interfaces

Furthermore the API supports

  • multiple arguments, for actions as well as for conditions
  • configuration of actions/conditions for every event and rule set, where the necessary arguments are available. Action writers don't have to care about action compatibility.
  • dynamic loading of needed arguments
  • condition evaluation which supports logical operations like OR and AND
  • negating conditions or logical operations
  • ordered execution of conditions, actions and rules, controlled with weights
  • a flexible input evaluation system (token, php, ..)
  • packing and unpacking arguments, used e.g. for scheduling rule set execution
  • building simple/complex interfaces, like rules admin ui or transformations

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