1.4.1Logical Operators

Basic logical operators. An example:

Example № 3[some expression] and ([some expression] or not [some expression])

1.4.2Conditional Expressions

This part of the language syntax defines conditional expressions. In general all conditional expressions consist of 3 parts:

• The left side or the target. The target is a field name, a function application or a constant.
• The operator (like > or is defined). In addition to providing the condition itself, the operator delineates the right side from the left side of the expression.
• The right side. The right side defines the value we are comparing against the target. It is a constant or a list of constants. For some operators, like is empty or is defined, the right side expression is absent. If the right side of the expression is absent, the right side is implied as = true.

Examples:

Example № 4price = "10.00 EUR"

Example № 5attributes.size in ("xxl", "xl")

1.4.3Function Expressions

Function expressions consist of a function name and a list of arguments. For example:

Example № 6lineItemTotal(sku = "TEST")

In this example, lineItemTotal is the function name and sku = "TEST" is the first argument (a nested predicate).

1.4.4Short Circuit Expression

Short circuit expressions allow a simplified variation of the predicates.

Some examples:

• true instead of true = true
• lineItemExists(...) instead of lineItemExists(...) = true
• lineItemsTotal(true) > "10.00 USD" instead of lineItemsTotal(true = true) > "10.00 USD"