If all
of the variable names and options that are referenced in GTL templates
had to be "hard coded" in the compiled template, it would require
that you redefine and recompile the template every time you created
the same type of graph with different variables. SAS programmers
are familiar with using SAS macros and macro variables to build application
code in which variables and other parameters can be specified by a
calling program. The same techniques, as well as other techniques
unique to ODS templates, can be applied in GTL to create reusable
templates.