* A family is a group of elements with a common set of properties, called parameters, and a related graphical representation.
* The Family Editor is a graphical editing mode that allows you to create and modify families to include in your project.
* Components are instances of loadable families and are hosted by other elements, which are instances of system families.
* A family that contains nested and shared families works as any other family within a project.
* Creating design geometry is often done parametrically in BIM, which means that the related elements in the design are defined by linked parameters, defining the interaction between the two for instance, you can build constraints between elements, lock dimensions and align elements
