The AutoCAD MEP 2022 toolset software uses the term content to represent real-world parts, such as fittings and equipment. Content Builder is a content creation tool included in AutoCAD MEP 2022 toolset. It is an integrated package of 3D modeling tools and 2D drafting and drawing capabilities that helps you to conceptualize, design, and build content. Each piece of content represents a part family, such as air terminal, junction box, or tank, that contains a collection of part sizes, such as a 4 x 4-inch rectangular floor register, a 1-inch conduit 13-hole square junction box, or a 150-gallon vertical tank, respectively. Content Builder enables you to create and modify part families and individual part sizes.
When you use Content Builder, you build 3D models of parts and generate and assign 2D drawing views of those parts to use in design layouts. The model is defined in terms of the size, shape, and position of the features that make up the part. You associate the part with a catalog and navigate to that part when you want to add it to your layout. You also add connectors to the part to enable intelligent connections to other building systems objects, in order to create complete building systems networks.