Newbie DB problem

Hi,

I'm a co-op student at the Joint Astronomy Centre in Hilo, Hawaii.  I got
hired to organize ALL of the company's technical documentation into a
single searchable database.  The only direction my boss gave me for this
project was "you should use Postgres".  So now I'm left to propose and
implement a DB that will allow users to add documents, do
keyword/author/title searches, and display the found documents on the web.
This must be a fairly common problem.  Is there a standard database
structure for this?   Are there any good books or online resources that
might give me some ideas? I realize that this is a pretty general
databasing question, but I'm not sure where to start. Thanks in advance
for your help.

Keith Grennan.