~~
~~ Copyright (c) 2004-2012, Willem Cazander
~~ All rights reserved.
~~
~~ Redistribution and use in source and binary forms, with or without modification, are permitted provided
~~ that the following conditions are met:
~~ 
~~ * Redistributions of source code must retain the above copyright notice, this list of conditions and the
~~   following disclaimer.
~~ * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and
~~   the following disclaimer in the documentation and/or other materials provided with the distribution.
~~ 
~~ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
~~ EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
~~ MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
~~ THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
~~ SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
~~ OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
~~ HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
~~ TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
~~ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
~~

Load Modules

  The default language loader of x4o load all 'META-INF/<language>/<language>-modules.xml' in the classpath.
  So every extension library has its own modules definition file. 
  
  All options are allowed in multiple forms and order.
  For xsd file see x4o-core classpath 'META-INF/language/modules-1.0.xsd'.
  
+--
<?xml version="1.0" encoding="UTF-8"?>
<modules version="1.0"
	xmlns="http://language.x4o.org/xml/ns/modules"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://language.x4o.org/xml/ns/modules http://language.x4o.org/xml/ns/modules-1.0.xsd"
	>
	<language version="1.0">
		<eld-resource>foobar-lang.eld</eld-resource>
		<eld-resource>foobar-backend-default.eld</eld-resource>
		<eld-resource>foobar-backend-old.eld</eld-resource>
		<module-loader>org.foo.bar.x4o.FooCustomModuleLoader</module-loader>
		<module-loader>org.foo.bar.x4o.BarCustomModuleLoader</module-loader>
		<sibling-loader>org.x4o.xml.meta.MetaLanguageSiblingLoader</sibling-loader>
		<sibling-loader>org.foo.bar.x4o.HelloWorldQueryLanguageSiblingLoader</sibling-loader>
	</language>
	<language version="2.0">
		<eld-resource>foobar-lang-2.0.eld</eld-resource>
	</language>
</modules>
+--