The doc is downloadable from Oracle in zips also, and it has the html index. There's quite a bit of doc online, what's not available is older code. The tarball of doc for Solaris 10 is huge, over 2 gigs gzipped. Expanded it's around 4 to 5. I don't have enough room for it, so I only unzipped the Solaris 10 doc for update 9.