why add xmlns="" in the attribute of a node?

Question

I am using C# and XDcoument to add nodes the root element. I use this code:

XElement miAnimalNuevo = new XElement("PrincipalNode",
                new XAttribute("Atribute1", "value attribute 1"),
                new XAttribute("Attribute2", "value attribute 2"),
                new XElement("subNode","0000"));

But I get this:

<PrincipalNode Atribute1="value attribute 1" Attribute2="value attribute 2" xmlns="">
    <subNode>0000</subNode>
  </PrincipalNode>

After the attribute 2, I see the xmlns="". Why? I only want the attributes.

Thanks.

http://stackoverflow.com/questions/5955878/xelement-is-automatically-adding-xmlns-to-itself — Habib, May 21 '13 at 07:36

score 3 · Accepted Answer · edited May 23 '17 at 12:05

This happens when you have an XML document that has a namespace defined somewhere up the tree.

Adding an element that is not in that namespace but in the empty namespace (i.e., no namespace) will add an empty xmlns attribute.

<xml xmlns="some_namespace_uri">
  <foo>The foo element inherits the 'some_namespace_uri' namespace</foo>
  <bar xmlns="">The bar element is in no namespace</bar>
</xml>

Related: Is xmlns="" a valid xml namespace?

why add xmlns="" in the attribute of a node?

1 Answers1