Starting with 11.0, companies can define Attributes and associate them with Equipment Types for the purpose of creating a Proposal.   Attributes are completely optional, but they will help sales people and technician find and select the most appropriate equipment for a proposal.   

Attributes are already in use today; for example, when selecting the Airflow for a Furnace or the Tonnage for a Condenser.  With 11.0, while the original attributes cannot be modified, new attributes can now be created by each company.  For example, a company might want to sell Thermostats and will want to differentiate between touchscreen and standard stats.  This can be accomplished through the use of an Attribute.