Region entities store information used to facilitate and automate modeling practices and processes. It enables a selection which can be common across design changes or other models, provided region data is the same.

Region entities support two configurations of input: By ID and By Metadata. Both inputs are supported for geometry only, and can be used for selection purposes.

For example, when using mesh controls, it is possible to mesh a surface which has been tagged with metadata (or ID). If the design changes and a new version is authored, then you can quickly reapply the same mesh controls as long as the metadata (or ID) is still applied to the new CAD version. Region entities enables an automated re-meshing process that is consistently repeatable.