Xrefing is a system used in Computer Aided Design that enables your drawings database to be much more manageable. It lends itself in particular to building/site services where changes are ongoing and constant drawing updates are required. Whereas previously, any changes to building profiles, for example, would have required amendments to numerous drawings, by using the Xrefing system, it requires that only one drawing need be updated. This drawing is then linked to the other drawings in your database to ensure that the very latest updates are shown throughout.