How to Resolve the 'The Matching Wildcard is Strict, but No Declaration Can Be Found for Element 'http'' Error

What does the error 'The matching wildcard is strict, but no declaration can be found for element 'http'' mean?

<http>...</http>

The error message 'The matching wildcard is strict, but no declaration can be found for element 'http'' typically occurs in XML or XHTML documents when the specified element is not defined within the schema or DTD (Document Type Definition). This strict validation process ensures that all elements have corresponding declarations to enforce proper structure and type adherence in the document.

<xml version="1.0" encoding="UTF-8"?>
<root xmlns:http="http://www.example.com/http-schema">  
  <http:request>
    <http:method>GET</http:method>
    <http:url>http://www.example.com</http:url>
  </http:request>
</root>

Causes

• The 'http' element is misspelled or incorrectly referenced.
• The XML or XHTML document is missing the necessary schema declaration or namespace.
• Using a restrictive DTD that does not declare the 'http' element.

Solutions

• Verify that the spelling of the 'http' element is correct in the XML or XHTML document.
• Include a proper XML schema (XSD) or DTD that defines the 'http' element.
• Add the appropriate namespace for the 'http' element if it's part of a specific XML schema.

Mistake: Not including the namespace declaration for 'http'.

Solution: Ensure you're using the correct prefix and that the namespace is declared at the beginning of your XML document.

Mistake: Using an outdated or incompatible DTD schema.

Solution: Update your DTD or switch to an appropriate schema version that declares the 'http' element.