{{tag>Manuals Rule_Language}}
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====== Conventions ======

  - Everywhere in this document “business object” also implies “business object groups”, unless explicitly stated otherwise.
  - The syntax of the Rule Language expressions is specified using the BNF notation. Some of the constructs of the BNF notation are explained below:
    - “|” symbol indicates a choice of several keywords or expressions. For example, the expression \\ (''INCREASE'' | ''REDUCE'') AttributeIdentifier()\\ indicates that either the ''INCREASE'' or ''REDUCE'' keyword may precede the Attribute Identifier.
    -  indicates zero or more. For example the following expression,\\ ''PredicateExpression'' () (''"AND"'' ''PredicateExpression()'')*\\ indicates that there is at least one PredicateExpression followed by zero or more combinations of ''AND'' ''PredicateExpression'' constructs.
    - ''[some expression]'' indicates that the expression in square brackets is optional. For example the expression,\\ ''SEND Id() TO AttributeIdentifier() [VIA ChannelName]'' \\ indicates that the ''VIA'' keyword followed by the channel name may or may not be used.