Interface for modifying data fields in a mark-up language environment

A method for modifying a data field is described, illustrated and claimed. The novel system and method allows for quick and efficient modification of all or a portion of a plurality of data fields, while preserving the ability to modify individual areas. An action is associated with a rule for modification of objects in a specific manner. When that action is performed, every object defined by the rule is modified. The method allows for modification of multiple groups in the same manner, and also allows for modification of individual areas.