This work is licensed under the Creative Commons Attribution-ShareAlike License. To view a copy of this license, see the file license.txt, visit http://creativecommons.org/licenses/by-sa/2.0 or send a letter to Creative Commons, 559 Nathan Abbott Way, Stanford, California 94305, USA. This component schema defines the XML Schema content model groups customElements and customAttributes to support validation of extension XML elements and attributes. This component XSD should be used if extensions are to be supported in LOM XML instances. This file has been modified by the Knowledge Media Institute of the University Koblenz-Landau (http://iwm.uni-koblenz.de). It contains the following changes: 1) Instead of "unique/strict.xsd" the schema "unique/loose.xsd" is imported because this reflects what is said in 1484.12.3-2005, page 35 (section C.1.3) 2) In all component XSDs the schemaLocation attribute was amended to the xs:import and xs:include statements. This enables the usage of the schemas with tools which don't deal well with missing schemaLocation informations. This file is available at "http://iwm.uni-koblenz.de/xsd/IEEE-LOM/loose"