This paper discusses multimedia and hypermedia modeling, authoring and formatting tools, presenting the proposals of the HyperProp system and comparing them to related work. It also highlights several research challenges that still need to be addressed. Moreover, it stresses the importance of document logical structuring and considers the use of compositions in order to represent context relations, synchronization relations, derivation relations and task relations in hypermedia systems. It discusses temporal and spatial synchronization among multimedia objects and briefly presents the HyperProp graphical authoring and formatting tools. Integration between the proposed system and the WWW is also addressed.Key words: Nested context model -HyperProp system -Multimedia/hypermedia formatting -Document logical structuring -Spatio-temporal synchronization 1 Actually, IMAP derived from the MOAP model. However, there are some conceptual differences between them, which will be highlighted throughout the paper. Although the IMAP model appears as IMD in some references, we will not make distinction between them.2 Note that HyperPro and HyperProp are distinct systems and NCM is the conceptual data model of HyperProp.