: The aim of this work is to present the Musical Score as a new attribute characteristic in an object-oriented database. It defines a new data type for attributes that can be associated to objects using the MIDI Standard, the Standard MIDI File format, and the General MIDI standards. To offer complete database support to musical scores as a data type, it is necessary to provide storage, manipulation, search and retrieval methods. This work uses the inner structure of Musical Scores, following the MIDI standard, to enable the creation of index mechanisms in the database, allowing for the retrieval of musical scores based on their contents.