The proper expression and execution of rules in Corticon rules is dependent on the type of data involved. Each attribute in the Corticon Vocabulary has a data type, meaning that it has restrictions on the type of data it can contain. Corticon standard data types are as follows:

Data Type Description
String Any combination of alphanumeric characters, of any length.
Integer A whole number, including zero and negative numbers, to the maximum values for a 64-bit long signed integer with 53 significant digits (-9007199254740991 to 9007199254740991).
Decimal A number containing a decimal point, including zero and negative numbers to the limits of precision in our library. With an arbitrary-precision, the Decimal type for JavaScript calculations are slower than with a plain Number, but they can be executed with an arbitrary higher precision that reduces occurrence of round-off errors. Decimal values in JSON input payloads can be represented either as a number or as string. See below for details and examples.
Boolean Values are true and false. T and F can also be used.
DateTime

DateTime values in a Corticon.js payload must conform to the ISO 8601 standard, or as the number of milliseconds since the epoch. For example, for 9/13/2025 2:00:00 PM EST use either 1757782800000 or "2025-09-13T13:00:00-04:00". See Formats for date and dateTime in JSON payloads and Formats for date and dateTime in Corticon.js Studio tester for details on date and dateTime values.
Date A value with only date information. No time information is allowed.

In this guide, the data types Integer and Decimal are often referred to by the generic term <Number>. Wherever <Number> is used, either Integer or Decimal data types may be used.

Decimal data in payloads

Decimal data might not fit in a JavaScript number type because JavaScript numbers are a subset of all numbers that can be expressed with the Decimal data type. Therefore, decimals as JavaScript numbers in JSON payload are represented as Strings. For example:

Decimal format in JSON Input Payload

Decimals in a JSON input payload can be represented either as a number or as string. For example:

{
	"decimal1" : 123.45, 
	"decimal2" : "9876543210000000000000000000000000000000.987"}
{

Decimal format in JSON Output Payload

Decimals as JavaScript numbers in a JSON output payload are converted to Strings (stringified). For example:

{
	"decimal1" : "123.45", 
	"decimal2" : "10000000000000000000000000000000.987"}
{