This is a sample implementation of the TransQuery processing model, enabling the use of XSLT as a query language over multiple XML documents. See http://www.xmlportfolio.com/transquery for more info. TransQuery - XSLT as query language 1.0 License - Apache Software License
Adaptive Object Model Framework: define your object model in XML, create easy pluggable components, easily adapt to changing requirements, make programming fun again.
XMLStarlet is a set of command line utilities (tools) to transform, query, validate, and edit XML documents and files using simple set of shell commands in similar way it is done for text files with UNIX grep, sed, awk, diff, patch, join, etc utilities.
A generic MUD Engine in language C (Universe and rules independent), role-play oriented, which uses XML for data.Some creation tools (for map, character, item) are provided for this MUD, but can be used with other one.
Generates the C source code for Query Object Framework objects and provides a test environment linked against QOF to query objects, store in XML and export into SQL files. Create the fundamental object code from XML exported by any other QOF project.
An XQuery interpreter module in Python for the ElementTree model for XML parsing. pythonxq 1.0 License - Academic Free License (AFL)
URIQA4J is an implementation of Nokia's URI Query Agent Model for the Java platform. Used as a component for your web application, it exposes your Java Objects encoded as Concise Bounded Descriptions of RDF resources. URIQA4J 0.1 License - GNU General Public License (GPL)
XML Manipulation Using DOM Document Object Model, DOM XML, libxml, qtdom, SDO Service Data Objects, SDO-DAS-Relational SDO Relational Data Access Service, SimpleXML, WDDX, XML Parser, XMLReader, XMLWriter, XSL, and XSLT XMLManipulation 1.0 License - Apache License V2.0; GNU General Public...
Another Java-database mapper (bean to table or to query), but you use SQL directly (no query language), no complex XML mapping, and automation of JDBC routines. It contains 3 functions: 1. readwrite mapping 2. query mapping 3. DDL generator jRelay 1.0 License - GNU General Public License (GPL)
Cheshire3 is a fast Z39.50, SRW, XML search engine, written in Python for extensability and using C libraries for speed. Next generation of the Cheshire system (http://cheshire.berkeley.edu) and designed around a distributable, object oriented model.