Nice Fujitsu white papers

Sorry if these were posted before; but Fujitsu has a nice whitepaper on
their supported version of Postgresql here:

http://www.fastware.com.au/docs/FujitsuSupportedPostgreSQLWhitePaper.pdf

PS: Can anyone explain more about their "Extended Storage Mangaer"
plug-in module that "enhances the original PostgreSQL storage mechanism
component" that they describe in that white paper?  It's mentioned
here http://www.fastware.com.au/postgresql.html that it stems from
their own RDBMS (Symfoware), but I didn't see any details.