Generally, the UI template is clustered into one or more steps, which then contain the elements (or inputs and outputs) for the user interface. In the first three lines of the
createUiDefinition.jsonfile, you will find the specification of the $schema, handler and version of our file:
"$schema": "https://schema.management.azure.com/schemas/0.1.2-preview/CreateUIDefinition.MultiVm.json#",
"handler": "Microsoft.Compute.MultiVm", "version": "0.1.2-preview",
The handler for an Azure managed application UI definition is always Microsoft.Compute.MultiVm. The latest version is 0.1.2-preview.