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[2] T. Bray, J. Paoli, C.M. Sperberg-McQueen a E. Maler. Extensible Markup Language (XML) 1.0 (Second Edition). W3C. 2000. URL: http://www.w3.org/TR/REC-xml.

[3] T. Bray, D. Hollander a A. Layman. Namespaces in XML. W3C. 1999. URL: http://www.w3.org/TR/REC-xml-names.

[4] J. Clark a MURATA Makoto. RELAX NG Specification. OASIS. 2001. URL: http://relaxng.org/spec-20011203.html.

[5] J. Clark a MURATA Makoto. RELAX NG Tutorial. OASIS. 2003. URL: http://relaxng.org/tutorial-20030326.html.

[6] J. Clark. RELAX NG Compact Syntax. OASIS. 2002. URL: http://relaxng.org/compact-20021121.html.

[7] J. Clark, J. Cowan a MURATA Makoto. RELAX NG Compact Syntax Tutorial. OASIS. 2003. URL: http://relaxng.org/compact-tutorial-20030326.html.

[8] D. C. Fallside. XML Schema Part 0: Primer. W3C. 2001. URL: http://www.w3.org/TR/xmlschema-0/.

[9] R. Jelliffe. Schematron. FDIS. ISO. URL: http://www.schematron.com/iso/Schematron.pdf.

[10] H.S. Thompson, D. Beech, M. Maloney a N. Mendelsohn. XML Schema Part 1: Structures. W3C. 2001. URL: http://www.w3.org/TR/xmlschema-1/.

[11] E. van der Vlist. Relax NG. O'Reilly. 2003. ISBN 0-596-00421-4. URL: http://books.xmlschemata.org/relaxng/page2.html.

[12] E. van der Vlist. XML Schema. O'Reilly. 2002. ISBN 0-596-00252-1.