The "@" character can be used to define the Vector marker in a Function Expression or User
Subroutine as shown in the figures below.
where the predefined BASE suffix refers to the base body or
faceset of the Vector. The "@" character
requires a predefined suffix as listed in following table.
Figure 8.109: Predefined suffix of "@" character
| @+Suffix | Description |
| @BASE/Marker Name | Use to set the marker on the base body of an entity. If the body is an assembled body, the expression must be defined as follows. @BASE/PART/Marker Name |
| @ACTION/Marker Name | Use to set the marker on the action body of an entity. If the body is an assembled body, the expression must be defined as follows. @ACTION/PART/Marker Name |
| @BM | Use to set the base marker of an entity. The base marker of the vector force is a floating maker whose position follows to the position of the action marker. Thus, if this marker is used to calculate a force, the Motion solver may fail due to a dependency. |
| @AM | Use to set the action marker of an entity. |
The "@" character is very useful for defining
a vector force with a User Subroutine when modeling a Links
(Chain) or tracked vehicle system.