About the web map specification objects
A web map is a JSON object that contains the settings for a map. It it typically stored in ArcGIS Platform where it can be accessed by a number of different applications. The Web Map Specification describes the structure for the JSON object. a web map. Adhering to the web map specification allows your applications to create, edit, and render any web map hosted on the ArcGIS Platform. For a more general overview of web maps, refer to Introduction to web maps. If you're interested in learning more about the Web Map Specification, get started by reading about the top level structure of the web map object.