The MULTOS query language

This chapter presents the query language defined in MULTOS for the retrieval of multi-media documents. The main features of this language is its capability to define conditions on components of the searched documents without specifying the exact types of these documents. The multi-media aspect is enhanced in this language, and conditions can be defined on the content of the images present in the documents. Finally, the MULTOS query language is compared to other query languages described in the literature.