QOF is a framework to allow the execution of SQL-type queries using collections of in-memory objects as 'tables'. . This module provides the default XML backend for libqof1 using a generic XML format called QSF. Any QOF object can be written out or loaded from QSF XML. Data can be converted to other text-based formats using XSL. This package provides the XML schemas to validate files and the QSF XML backend module.