In the previous chapter, we discussed working with others in a Revit-to-Revit environment; however, often you'll need to work with data from other software platforms. For example, you may need to coordinate data from other disciplines, reuse legacy data, or integrate disparate design platforms. Fortunately, there are several ways to use external data within your Revit model in both 2D and 3D. We will discuss not only the methods of importing and exporting data but also when to use each method and the reasons for using specific settings. In this chapter, you'll learn to: