!measurement_equations
Equation1;
Equation2;
Equation3;
...
!measurement_equations
Equation1;
'Equation label' Equation2;
Equation3;
...
The !measurement_equations
keyword starts a new block of measurement equations; the equations can stretch over multiple lines and must be separated by semi-colons. You can have as many equation blocks as you wish in any order in your model file: They all get combined together when you read the model file in.
You can add descriptive labels to the equations (in single or double quotes, preceding the equation); these will be stored in, and accessible from, the model object.
!measurement_equations
'Inflation observations' Infl = 40*(P/P{-1} - 1);