Customizing the metamodel : Diagrams: Creating and modifying : Assigning symbols to diagrams : Assigning a symbol type to a diagram type
  
Assigning a symbol type to a diagram type
You may assign new symbol types or existing symbol types (symbols that already exist in another diagram) to new or existing diagram types. Symbol types may be added to diagram types using the following syntax:
ASSIGN <symbol-type-name> [IN <diagram-type-name1>] TO <diagram-type-name2>
Symbol types may also be added to diagram types within the SYMBOL specification using the ASSIGN .. TO keyword combination, as follows:
SYMBOL <symbol-type-name> [IN <diagram-type-name1>] {ASSIGN TO <diagram-type-name1>}
Example
For example, the USRPROPS.TXT below creates a new diagram type called a Wireless Network diagram, which provides of three new symbol types to be drawn on it: a Satellite, a Computer, and a Server, and one existing symbol type to be drawn on it: a state symbol from a “State Transition Ward & Mellor” diagram (as compared to a State symbol from a UML State diagram or an IDEF3 State diagram, etc:
RENAME DIAGRAM "User 1" To "Wireless Network"
RENAME SYMBOL "User 1" TO "Satellite"
RENAME SYMBOL "User 2" TO "Computer"
RENAME SYMBOL "User 3" TO "Server"
ASSIGN "State" IN "State Transition Ward & Mellor" TO "Wireless Network"
SYMBOL "Satellite" {ASSIGN TO "Wireless Network"}
SYMBOL "Computer" {ASSIGN TO "Wireless Network"}
SYMBOL "Server" {ASSIGN TO "Wireless Network"}
See also Limitations of assigning a symbol type to a diagram type.