Abstract: A user accessing a first web application can request to clone that application to form a second web application, where the first web application may be owned by another user. The cloning operation involves copying at least part of a directory for the first web application to a new directory for the second web application. For example, non-private content types, queries, and/or hard-coded images and strings can be copied from the parent directory to the clone directory. The clone web application is then rendered in accordance with the content in its directory.

Abstract: Interacting with a shared data model is disclosed. Interacting includes requesting information associated with an attribute from the shared data model, forming a request for content based on the information, and sending the request.

Abstract: Selecting advertisements to deliver to a user of an electronic application system. Selecting includes storing a plurality of user defined object types for defining attributes of user contributed objects, and storing a plurality of user contributed objects, each having an object type. Selecting further includes receiving from a user a request for one or more of the stored objects, wherein at least one of the requested objects has a user defined object type, and selecting an advertisement to provide to the user based at least in part on the user defined object type of the one or more requested objects.