Represents a highlight rule;each highlight rule consists of an expression, operator, values, and corresponding format style
A highlight rule gives a set of conditional style properties. The style is applied only if the rule �fires.�
An expression used to apply a particular format style
The operator for a simple condition
The value for simple conditions with the operators: <, <=, =, <>, >=, >, between, not between, like
The value for simple conditions with the operators: between, not between