* {characters}
! {characters}
/* {characters} */
statement; statement
variable[start, length]
variable[start, length] = expression
{dictionary_record_column}
$INSERT {file_name,} record_name
expression operator expression
variable
variable<field>
variable<field, value>
variable<field, value, subvalue>
variable = | += | -= | := expression
- OR -
matrix(subscript) = | += | -= | := expression