JSON (Tools/APIs) Contents Background Information Available Tools Create, use, and modify JSON-format objects and arrays; serialize objects as JSON; create objects from JSON. Background Information JSON (JavaScript Object Notation) is a lightweight, human-readable data interchange format, described by RFC 7159Opens in a new tab and ECMA-404Opens in a new tab. It is commonly used in client-server communications. Available Tools dynamic object and dynamic array classes A dynamic object is a special kind of InterSystems IRIS® object that has no schema. Instead, such an object is empty, and you can create properties simply by using assignment statements. A dynamic array is similar.Dynamic objects and arrays are defined by three classes: %DynamicObjectOpens in a new tab, %DynamicArrayOpens in a new tab, and %DynamicAbstractObjectOpens in a new tab (the common superclass).These classes provide methods to serialize themselves to and from JSON. For details, see Using JSON.Availability: All namespaces. dynamic object and dynamic array expressions ObjectScript provides support for JSON-format object and array expressions, which return instances of %DynamicObjectOpens in a new tab and %DynamicArrayOpens in a new tab, respectively. For details, see Using JSON.Availability: All namespaces.