2.9 ECM Forms, also known as 'DM Forms' or simply 'Forms', are available in Alfresco 2.9 Labs release as an experimental feature (for testing and evaluation). As from version 3.2 this functionality no longer exists, due to a redesign of he Forms concept in Share 3.2.
These allow structured XML content to be created based on an XML schema (XSD) in a similar way to Web Forms. However, ECM Forms do not directly support renditions although Content Transformations can be used to achieve similar results.
To create/edit a form definition:
Login as admin
Navigate to Company Home -> Data Dictionary -> Forms
Select Create -> Create Form
Use the Create Form Wizard to create a form definition by uploading an existing XSD