Rules

Rules Syntax

A rule is a string that represents a boolean expression. It should be in the format <variable> <operator> <value>. Additionally, rules can be combined in the following format <rule> <logical expression> <rule>. Quotes inside the rules need to be escaped appropriately.

The following operators are supported:

Logical Expressions

Operator	Meaning	Example
!, not	boolean "not"	not(country = "US")
or, \|, \|\|	boolean "or"	country = "US" or age < 50
and, &, &&	boolean "and"	age > 20 and age < 50

Relational Expressions

Operator	Meaning	Example
=, ==, is, eq	equal to	country = "US"
~=, =~, is, eq	loose equal to	age ~= "20"
<, lt	less than	age < 50
>, gt	greater than	age > 20
<=	less than or equal	age <= 50
>=	greater than or equal	age >= 20
in	present in list of items	country in ["US", "FR"]
in	present in range of values	age in 20 to 50

Quantifiers

Operator	Meaning	Example
oneOf	group of boolean "or"s	oneOf(country = "US", age < 50)
allOf	group of boolean "and"s	allOf(age > 20, age < 50)
exists	first-order "or" operator	exists(c:countries, c == "US")
forAll	first-order "and" operator	forAll(p:purchases, p > 50)

String Expressions

Operator	Meaning	Example
contains	string contains	user-agent contains "Chrome"
startsWith	string startsWith	user-agent startsWith "Chrome"
endsWith	string endsWith	user-agent endsWith "81"
matches	string matches regex	user-agent matches /^(Chrome\|Firefox)$/
containsWord	string contains word	category containsWord "summer"

info

The containsWord operator ensures to match "whole words" only taking into account word boundaries.

A word boundary is any character that is not a-z, A-Z, 0-9, _ including or excluding diacritics.

Array Expressions

Operator	Meaning	Example
containsAll	array contains all elements	ids containsAll [1, 2, 3]
containsAny	array contains any element	ids containsAny [1, 2, 3]
containsAllWords	array contains all words	categories containsAllWords ["Summer", "Sale"]
containsAnyWord	array contains any word	categories containsAnyWord ["Summer", "Sale"]

info

The containsAllWords and containsAnyWord operators ensure to match "whole words" only taking into account word boundaries.

A word boundary is any character that is not a-z, A-Z, 0-9, _ including or excluding diacritics.

Geo Expressions

Operator	Meaning	Example
near by	value near coordinate	userCoordinates near [41.176296, -8.596050] by 30 km

Date Expressions

Operator	Meaning	Example
after	timestamp is after x days	lastPurchase after 7 days ago
before	timestamp is before x days	lastPurchase before 3 days ago
between	timestamp is between x and y days	lastPurchase between 3 and 7 days ago

Built-In Functions

Function	Meaning	Example
isDefined	returns true if a variable is defined	isDefined(country)
normalize	returns the string in lowercase without combining diacritics	normalize(category)
toString	attempts to convert a value to a string	toString(status)
toNumber	attempts to convert a value to a number	toNumber(productId)
toBoolean	attempts to convert a value to a boolean	toBoolean(promotion)
map	returns a new list with the elements updated based on the expression provided	map(x:products, x["id"])