XDBM

XDBM is a database designed specifically to handle XML data. It offers greater speed (since the data is stored in a preparsed format), lower memory usage (since only those parts of the file needed are loaded into memory) and faster searching for XML elements. XDBM can also parse and store plain text XML files. XDBM aims to be as close to the W3's DOM specification as possible. XDBM also comes with utilities for converting between XDBM file format and plain text and for reading XDBM files in less and emacs.