for example.

postgres=# select version();
                           version
-------------------------------------------------------------
 PostgreSQL 9.0.2, compiled by Visual C++ build 1500, 64-bit

postgres=# SELECT uuid_generate_v3(uuid_ns_url(), 'http://www.postgresql.org');
           uuid_generate_v3
--------------------------------------
 cf16fe52-3365-3a1f-8572-288d8d2aaa46



Archive:  pg90_uuid_ossp_x64.zip

  inflating: share/contrib/uninstall_uuid-ossp.sql
  inflating: share/contrib/uuid-ossp.sql
  inflating: lib/uuid-ossp.dll

[ICO]NameLast modifiedSizeDescription

[PARENTDIR]Parent Directory   -  
[   ]uuid.lib.md5 2011-05-20 23:40 50  
[   ]uuid.lib 2011-05-20 23:33 123K 
[   ]uuid.exe 2011-02-01 01:15 24K 
[   ]pg90_uuid_ossp_x64.zip 2011-02-02 00:30 21K