Jasper van de Gronde popped up on the redland-dev list with some bugs and fixes for Raptor on win32 with MSVC6 (i.e. not cygwin). Turns out he's been working on what I've called RDFDB/win32 which is a much modified port of RDFDB to Win32 and has now switched to using Raptor for the parsing. Somewhat of a similar space to Redland but with a server and not modular internally - hey a competitor :). Jasper has been making this for his MDDB system which is described as a personal MetaData DataBase (hence MDDB) intended primarily for music metadata it seems.