This is correct. VoltDB manages its metadata through its catalog - a combination of your DDL and stored procedure byte code (if your app includes stored procedures). The catalog is documented:
There are a lot of learning resources online about VoltDB. In addition to the online documentation, you might be interested in Volt University (http://voltdb.com/resources/volt-university/
) and our growing collection of common developer oriented recipes (http://voltdb.com/dev-center/
). There is also a very complete tutorial that walks through building an application (http://voltdb.com/dev-center/tutorial/
I find taking 15 minutes or so to read the tutorial and to poke through the examples in the distribution is a great way to understand the basics of VoltDB.