edition has no specific environment set at the edition level it would inherit from its parent the publication or from the latter 39 s parent the publication set document objects are usually associated with usage rules which evaluate environment variables in order to take actions such as deciding which version of a component to include in a translated document rules are statements that reference business object and attribute values in the local environment they consist of an antecedent and a consequent side the antecedent side sets out a condition that must evaluate to u201c true u201d or otherwise satisfy a value or comparative statement for the consequent actions to take place the consequent side describes actions to take for various evaluation results for instance in the case of a translated document the publication would have a value for language inherited by the active edition to set the language property value that all components must match the system does not store documents as text streams but as pointers to elements in the structured document outline the elements in turn point to specific components this organization facilitates non repetitive storage and most importantly can accomplish automatic updating of every publication that points.