[XML] Bray, T., Paoli, J., Sperberg-McQueen, C., Maler, E., Yergeau, F.: Extensible Markup Language (XML) 1.0 (Fourth Edition). W3C, 2006. Available at: XML

[NS] Bray, T., Hollander, D., Layman, A., Tobin, R.: Namespaces in XML 1.0 (Second Edition). W3C, 2006. Available at: XML Namespaces

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

[NRL] Clark, J.: Namespace Routing Language (NRL). Thai Open Source Software Center Ltd, 2003. Available at: NRL

[RLXD] Kosek, J., Nálevka, P.: Relaxed, on the Way Towards True Validation of Compound Documents. WWW2006, Edinburg, 2006. Available at: www2006