Error parsing XML: Prefix must not be bound to reserved namespace explicitly

Question

I cannot fix this error even after trying the mentioned techniques in other posts. I don't have crashlytics in my application. It's rather simple. The issue persists even after cleaning the build and invalidating caches. The following code is present in the values.xml file with a curly red line under the resources keyword.

    <resources
    xmlns:ns1="urn:oasis:names:tc:xliff:document:1.2"
    xmlns:ns2="http://schemas.android.com/tools"
    xmlns:ns3="http://www.w3.org/2000/xmlns/">
  ...

I know this question was asked a few times but I'm not able to fix the error in my application.

Can you provide the complete error messages? What reserved namespace is it? xml is a reserved namespace.. — vtd-xml-author, Jun 09 '16 at 07:07
The error says that the prefix 'xmlns' cannot be bound to any namespace explicitly; neither can the namespace for 'xmlns' be bound to any prefix explicitly. — AlphaQ, Jun 09 '16 at 07:18
@AlphaQ I am also facing the same issue, please give me solution if you have. — Shailesh, May 31 '17 at 10:43
@Shailesh Check this: https://stackoverflow.com/questions/2221221/frequent-issues-arising-in-android-view-error-parsing-xml-unbound-prefix — AlphaQ, May 31 '17 at 13:24
@AlphaQ Thank you for your reply, I'll try with that solution. — Shailesh, Jun 23 '17 at 13:33

score 1 · Accepted Answer · answered Jun 09 '16 at 11:25

The declaration of ns3 is invalid because the namespace URI http://www.w3.org/2000/xmlns/ is reserved.

See section 3 of the XML Namespaces 1.1 specification at http://www.w3.org/TR/xml-names11/

The prefix xmlns is used only to declare namespace bindings and is by definition bound to the namespace name http://www.w3.org/2000/xmlns/. It must not be declared or undeclared. Other prefixes must not be bound to this namespace name, and it must not be declared as the default namespace. Element names must not have the prefix xmlns.

Error parsing XML: Prefix must not be bound to reserved namespace explicitly

1 Answers1