What does “xmlns” in XML mean?

Question

I saw the following line in an XML file:

xmlns:android=\"http://schemas.android.com/apk/res/android\"

I have also seen xmlns i

Answer 1

xmlns - xml namespace. It's just a method to avoid element name conflicts. For example:

  
      5
  

  
      5
  

Two different node elements in one xml file. Without namespaces this file would not be valid.