PDS-D
What was done
What was done
šImplemented
a multi-tiered
information architecture
lApplication
Clients (Browsers/Interfaces)
lMiddleware
- Object Oriented Data Technology (OODT)
lData
and Metadata Servers (product server, profile server)
lData
Repositories and Catalogs
šSimplified
and standardized system interfaces
through middleware
šUsed
existing PDS subsystems but hide heterogeneity
lUser
Interfaces (Atlas, DITDOS)
lData
repositories (disk farms)
lCatalog
databases (Sybase, Gatesware,…)
lRemained
geographically distributed and locally managed
šSeparated
Data Architecture from Technology Architecture
lUsed
archive metadata to its full
potential
lEvolved
technology architecture