CentraSite is installed with a number of predefined asset types. Some of these types are "core types" that belong to CentraSite itself. You can modify these types as described in Modifications You Can Make to CentraSite's Core Asset Types.

Other predefined types are installed to support the use of CentraSite by products such as the webMethods Product Suite. These types belong to other products, which expect the type definitions to remain unchanged. Modifying or deleting these types in CentraSite can lead to inconsistencies or errors in the product that uses the type. For example, if you modify or delete a type that is used by the webMethods Product Suite, components such as the webMethods Integration Server may no longer be able to publish assets to CentraSite. You must not modify these predefined asset types.