Dynamic Job References are more efficient because they allow you to assign a reference, instead of implicitly defining each specific Job name. Dynamic Job References may be substituted anywhere in the matrix file where explicit Job names are required (except for Import Arrays).

Note: Dynamic Job References begin with: @

Here are a listing of the dynamic Job references available throughout the matrix file.
Dynamic Job References	Description
@active	Use the Active Job.
@current	Use the Active Job. (Same as "active")
@topcell	Use the Top Cell (if hierarchy).
@first	First Job
@last	Last Job
@next	Next Job
@previous	Previous Job. Shortcut: May also use: @prev