Starting with AEM Forms 6.4, we now have the ability to define Form Data Model (FDM) without associating it with a data source. The following video walks through the steps to create FDM without any data source.
This gives you the following advantages:
Speed’s the development of Interactive Communication Documents/Forms.
Development of Interactive Communication Documents/Forms can be done in parallel with data source development.
Once the data source is developed, you can do the bindings using the visual editor.