Zoom: A Hierarchical Representation for Heterogeneous Applications,
Cosimo Anglano, Jennifer Schopf, Rich Wolski and Francine Berman, 
UCSD CS Tech Report #CS95-451

We describe Zoom, a hierarchical representation in
which heterogeneous applications can be described.  The
goal of Zoom is to provide an abstraction that computer and
computational scientists can use to describe heterogeneous
applications, and to provide a foundation from which
program development tools for heterogeneous network
computing can be built.  Three levels (structure,
implementation and data) of the Zoom hierarchy are
described and are used to illustrate two heterogeneous
applications.  Extensions to Zoom to include additional
resource parameters required by program development tools
are also discussed.