#cen - to define a centred title
#dt - table definition
rpt - To produce the report
.declare - variable declaration with o/p format
.define - macro to specify SQL commands to be used to retrieve data

== .define statement is terminated by two full stops at the beginning of a line. ==

.report - executes a select macro
.execute - executes a select macro
.if - tests values and allows conditional execution
.goto - control execution
#t 2 - starts using table 2 format
#te - reverts to the previous table format
#np - start a new page
#n - start a new line
#p - start a new paragraph
#nc next column
# end literal output and start formatting again.
.rem - comments
& - execute or call macros