Reciprocal of DESCRIPTION_FOR.
Indicates that one or more target objects provide descriptive information about this object. This relation type is most appropriate for information that is not essential as its presentation may be user-configurable and/or limited to an on-demand mechanism such as an assistive technology command. For brief, essential information such as can be found in a widget's on-screen label, use LABELLED_BY. For an on-screen error message, use ERROR_MESSAGE. For lengthy extended descriptive information contained in an on-screen object, consider using DETAILS as assistive technologies may provide a means for the user to navigate to objects containing detailed descriptions so that their content can be more closely reviewed.