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[NS] Bray, T., Hollander, D., Layman, A., Tobin, R.: Namespaces in XML 1.0 (Second Edition). W3C, 2006. Available at: http://www.w3.org/TR/REC-xml-names

[NVDL] Murata, M.: Document Schema Definition Languages (DSDL) — Part 4: Namespace-based Validation Dispatching Language (NVDL). ISO/IEC FDIS 19757-4, 2005. Available at: http://www.jtc1sc34.org/repository/0694.pdf

[NRL] Clark, J.: Namespace Routing Language (NRL). Thai Open Source Software Center Ltd, 2003. Available at: http://www.thaiopensource.com/relaxng/nrl.html

[RLXD] Kosek, J., Nálevka, P.: Relaxed — on the Way Towards True Validation of Compound Documents. WWW2006, Edinburg, 2006. Available at: http://www2006.org/programme/files/pdf/4508.pdf