# Create Assignment Rule

There are multiple ways to assign a value to a field in assignment rules.  Some of the most common are to assign a fixed value (e.g., a text string, a field from an available data view, a date, or with additional mathematical functions).  

This document will show all of these common assignment methods. 

 The API call remains the same for all methods, the differences are in what entity fields are used in the body of the API call.

 This call is a POST call with the header of 

<http://99.99.99.99:8080/core/1.0/API/assignmentRule>.