Expressions
Logical Expressions
Logical Expressions are expressions used in If statements and iterator
filters, which yields a boolean value (true or false) when evaluated.
They are on the form:
LogicalExpression =
'('LogicalExpression')'
|
not
LogicalExpression |
LogicalExpression or
LogicalExpression |
LogicalExpression and
LogicalExpression |
ComparisonExpression |
BooleanLiteral
Comparison Expressions are on the form:
ComparisonExpression =
ValueExpression
'=' ValueExpression |
ValueExpression ('!='|'<>') ValueExpression |
ValueExpression '<' ValueExpression
ValueExpression '>' ValueExpression
ValueExpression '<=' ValueExpression
ValueExpression '>=' ValueExpression
Value Expressions
Value Expressions are expressions that computes arithmetic combinations
of simple expressions, e.g. literals, references, or function calls.
Value Expression =
SimpleExpression '+' SimpleExpression |
SimpleExpression '-' SimpleExpression |
SimpleExpression '*' SimpleExpression |
SimpleExpression '/' SimpleExpression |
SimpleExpression
Simple Expressions
Simple expressions are expressions that represents atom expression
parts. They can be literals (Boolean, String, Integer, Real, null),
references to variables, or calls to functions / rules.