The OBIEE Plugin support two models of management for Web Catalog objects, derived by the selected project type.

Oracle BI

This project type is equivalent to the pre-5.5.0.1 model, and was previously name Oracle Business Intelligence.  The web catalog project files are populated into various object types, making it easier to filter by those types.

Oracle BI 2.0

This project type is new for 5.5.0.1 and matches the model introduced by the Oracle Transactional Business Intelligence (OTBI) support in 5.5.0.0.  The web catalog project files are populated into a single object type, called WebCatalog, making it easier to locate a set of files matching a file path or naming convention.  To identify the type of each file, the object name is artificially decorated with an extension matching the OBIEE object type.  For example, /shared/Sample Lite.Folder or /shared/Sample Lite/DailyReview.Report.

Both models are supported, with the only caveat being that you cannot change the project type of an existing project once the project files have been populated. Instead, you must create a new project.  While nothing will prevent you from changing the type on the project you will encounter errors during populate unexpected behavior, and this is not a supported function.