uInformation content is different across the process
phases
umany flavours of instances (as
much as we have process steps?)
uoccurance cannot finally be
checked by SGML/XML parser
uDifferent data is generated in different process
steps
usophisticated version control
and process management
utools to merge data
uNot all objects exist along the process chain
uhandle broken links
uestablish links automatically
by knowing the semantics
uconvert to standard SGML style
for exchange
uGlobal data models of tools or processes must be
mappeded
uexport capabilities are
determined by the internal data model
uallow multiple global data
models
uharmonize data models on SGML
level