This paper deals with the integration of multimedia and database technologies in order to describe web multimedia documents. We present a middleware to seamlessly handle database accesses as well as compositional, spatial and temporal constraints related to data presentation. Our approach is based on the concept of Templates. A template is a logical presentation unit that merge database queries with layout specifications. We choose an XML and SMIL approach to implement template. Template definition and invocation are mapped into a XML DTD. Each template is then translated into a SMIL document. In this paper, we give an example to show the advantages of our approach.