Update database text

acoustid/web/pages/database.md

@@ -1,32 +1,16 @@
 Title: Database
 
-The AcoustID database includes user-submitted audio fingerprints, their mapping to
-MusicBrainz IDs and some supporting tables. It follows the [structure of the
-PostgreSQL database][db] used by the AcoustID server. Each table is exported in a
-separate file with the tab-separated text format used by the
-[`COPY` command][copy]. At the moment, there are no tools for importing the
-database dump, it has to be done manually.
+The main part of the AcoustID database is publicly available. That includes
+user-submitted audio fingerprints, their mapping to MusicBrainz IDs and
+some other mappings.
 
-The main database is licensed under the [Creative Commons Attribution-ShareAlike 3.0
-Unported License][cc], with the exception of the MusicBrainz-AcoustID mapping which is
-placed into the [public domain][pd].
+The data is published daily, as incremental update files in JSON format,
+which you can use to reconstruct the database and keep it up to udate.
+The files can be downloaded [here](http://data.acoustid.org/).
 
-Monthly database dumps can be downloaded [here](http://data.acoustid.org/).
+The data is licensed under the [Creative Commons Attribution-ShareAlike 3.0
+Unported License][cc], with the exception of the MusicBrainz-AcoustID mapping
+which can be considered [public domain][pd].
 
-All files are signed using [GnuPG](gpg). In order to verify the signatures you have
-to first import the [public key](pubkey):
-
-    $ curl http://data.acoustid.org/pubkey.txt | gpg --import -
-
-Once you have the public key imported, you can verify the signature:
-
-    $ gpg --verify acoustid-core-dump.tar.bz2.asc
-    gpg: Signature made Sun Nov 20 10:17:24 2011 UTC using RSA key ID B8ED25DD
-    gpg: Good signature from "AcoustID Downloads <[email protected]>"
-
-[copy]: http://www.postgresql.org/docs/9.0/static/sql-copy.html
 [cc]: http://creativecommons.org/licenses/by-sa/3.0/
 [pd]: http://creativecommons.org/licenses/publicdomain/
-[db]: https://github.com/acoustid/acoustid-server/blob/master/acoustid/tables.py
-[gpg]: http://www.gnupg.org/
-[pubkey]: http://data.acoustid.org/pubkey.txt