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Visual query languages are seen as the next step in query language evolution. The aim of visual query languages is to provide users with a friendly interface that easily allows them to pose complex queries. Most of the existing visual query languages have a low expressive power due to the fact that they are often just GUIs designed for naive users. A powerful query language significantly helps to simplify multimedia database access. Such languages must provide constructs for querying based on the structure of multimedia data. For this purpose, we have defined MOQL (Multimedia Object Query Language). MOQL extends OQL by including extensions related to spatial properties, temporal properties, and presentation properties.

Demo

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Vincent Oria
1998-11-24