Many useful XML applications require a smooth integration of time- and space- dependent media objects and structures in XML documents. The XML tree document structures have limitations in support of spatial and temporal relationships for multimedia objects querying. However, the relationships could be specified based on spatial and temporal datatypes. The XML Schema:Datatypes framework opens up an opportunity to explore this dimension in a new way, and this paper will show this new perspective in specifying and querying multimedia objects and structures in such a framework. This abstract datatype approach provides potential advantages in query processing of multimedia objects and structures in XML.