The Tanagra project - a simple MDBS API

A multidatabase system (MDBS) is a software package that allows user transactions to invoke retrieval and update instructions against data located in autonomous heterogeneous hardware and software environments. Here, the Tanagra Project is presented, a large part of which is a simple MDBS API. This API is introduced, and the data model it uses is described. The layers of the API and the tasks and capabilities of each layer are defined. Ways of handling standard data operations are shown. Possible extensions of the API are discussed, as well as its limitations and shortcomings