The AND_SUBTYPES keyword is used with symbols and properties. You can have a symbol represent a definition and its sub type, and allowing properties to reference a definition and its subtypes. For an implicit relationship, it means that the relationship also represents references from the given property name in subtypes of the source definition type.
Examples to use for symbols
Symbol represents
SYMBOL "EA Objective" { REPRESENTS NODE "EA Objective" AND_SUBTYPES ASSIGN TO "EA Diagram" DEPICTIONS { MENU "images\Rectangle.bmp" } }
Explicit relationship
SYMBOL "Enacted By" { REPRESENTS EXPLICIT RELATIONSHIP "Enacted By" AND_SUBTYPES ASSIGN TO "EA Diagram" DEPICT LIKE "Generic Line" }
Implicit relationship
SYMBOL "Supports Achievement Of" { REPRESENTS IMPLICIT RELATIONSHIP "EA Rule"."Missions" AND_SUBTYPES ASSIGN TO "EA Diagram" DEPICT LIKE "Generic Line" }