Issue with svg xmlns attribute in svg document

[Mutiny]

I am have an svg document \[code\]<svg xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:cc="http://creativecommons.org/ns#" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:svg="http://www.w3.org/2000/svg" <====== xmlns="http://www.w3.org/2000/svg" <====== xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" width="744.09448819"\[/code\]The above 2 marked attributes are creating the problem. The inkscape generates the document like the above formate. But until we manually not rename the second attribute, the document does`nt works properly :\[code\] xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:svg="http://www.w3.org/2000/svg" <====== Renmaexmlns="http://www.w3.org/2000/svg" <====== xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"\[/code\]Now its fine, but why this happens can anybody explain me please?