This paper discusses some problems encountered in hypermedia-based col
laboration and reuse, and presents a conceptual framework to resolve t
hese problems. Three suggestions are made based on the discussion: 1)
extra organizational structures are necessary in shared hypermedia to
support collaborative interactions; 2) an abstract schema is a key to
capture the dynamic nature of the shared hypermedia; 3) an integration
of the schema evolution approach and the workflow approach is recomme
nded for an open system hypermedia teamwork support. The whole authori
ng environment is divided into several component spaces with particula
r respect to the Dexter Hypertext Reference Model. Not only can this s
eparation reduce the overall complexity of working within such an envi
ronment, but it also conforms more closely with human cognitive needs
in collaborative authoring and reuse activities.