| Application module: Event | ISO/TS 10303-1064:2018-11(E) © ISO | 
         (*
ISO/TC 184/SC 4/WG 12 N2114 - ISO/TS 10303-1064 Event - EXPRESS ARM
*)
         
SCHEMA Event_arm;
         USE FROM
         Date_time_arm;
            -- ISO/TS 10303-1010
         USE FROM
         Date_time_assignment_arm;
            -- ISO/TS 10303-1014
         USE FROM
         Value_with_unit_arm;
            -- ISO/TS 10303-1054
TYPE date_or_event =
         
         
         SELECT
            (Calendar_date, 
    Date_time, 
    Event);
         END_TYPE; 
         
ENTITY Event;
           id : STRING;
           name : STRING;
           description : 
         OPTIONAL 
         STRING;
           actual_start_date : 
         OPTIONAL 
         date_or_date_time_select;
           planned_start_date : 
         OPTIONAL 
         date_or_date_time_select;
         
         END_ENTITY;
ENTITY Event_relationship;
           relation_type : STRING;
           description : 
         OPTIONAL 
         STRING;
           relating_event : Event;
           related_event : Event;
         
         END_ENTITY;
ENTITY Relative_event
           SUBTYPE OF (Event);
           base_event : Event;
           offset : Duration;
         
         END_ENTITY;
         END_SCHEMA;  -- Event_arm
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