A data structure which describes how a particular CHP differs from a reference CHP. In Win Word 6.0, the CHPX simply consists of a grpprl which is applied to the reference CHP to produce the originally encoded CHP. By applying a CHPX to the character properties (CHP) inherited by a particular paragraph from its style, it is possible to reconstitute the CHP for the portion of the character run that intersects that paragraph