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Why Export drops namespace prefixes in the exported XML?

• To: mathgroup at smc.vnet.net
• Subject: [mg127152] Why Export drops namespace prefixes in the exported XML?
• From: "Alexey Popkov" <lehin.p at gmail.com>
• Date: Mon, 2 Jul 2012 22:17:23 -0400 (EDT)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com

Good day,

I am trying to generate Excel-compatible XML file from Mathematica. At 
first, I have created a test XML file by saving a Microsoft Excel workbook 
as "XML Table". Then I imported this file:

XMLdata = Import["test.xml", "IncludeNamespaces" -> True]

Now I am Exporting this backward to XML:

Export["test_exported.xml", XMLdata, "AttributeQuoting" -> "\""]

The generated file cannot be opened by Excel. Comparison it with the 
original file shows that most of namespace prefixes are dropped although 
they were present in XMLdata. Why this happens? How to Export correct XML 
file which will be compatible with Excel?

Thanks in advance.

Alexey