Software Customisation
Reference Manual
PML 1 Expressions
: Format of Expressions
Format of Expressions
The format of an expression, for example the use of brackets, spaces and quotes, is important. If you do not follow the rules given below you will get error messages:
Text must be enclosed in quotes. For example:
‘This is text’
There must be a space between each operator and operand. For example:
x + y
Use round brackets to control the order of evaluation of expressions and to enclose the argument of a function. For example:
SIN(30)
In general, you do not need spaces before or after brackets, except when a name is followed by a bracket. If there is no space, the bracket will be read as part of the name. For example:
(NAME EQ /VESS1 )
1974 to current year.
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