The Attribute Used to Define a New Namespace is

Learn how the ‘xmlns’ attribute is used to define a new namespace in XML documents. Explore examples, case studies, and statistics on namespace usage.

Understanding the xmlns Attribute

In the world of XML and HTML, namespaces are crucial for organizing and distinguishing elements. One of the key attributes used to define a new namespace is the xmlns attribute.

What is the xmlns attribute?

The ‘xmlns’ attribute stands for XML namespace and is used to declare a namespace in XML documents. It specifies the namespace of the elements within the document.

How to use the xmlns attribute

To define a new namespace using the xmlns attribute, you simply add it to the root element of your document and assign the namespace URL as its value. For example:

  • <html xmlns=””>

In this case, the namespace URL ‘’ is associated with the ‘html’ element.

Benefits of using namespaces

By using namespaces, you can avoid naming conflicts, improve document readability and organization, and facilitate better document validation and parsing.

Real-world example

Consider a scenario where you have an XML document with elements from multiple sources or standards. By using namespaces, you can clearly differentiate between elements and avoid ambiguity in interpretation.

Case study: XML Schema

XML Schema is a common use case for namespaces, where different elements can be defined under distinct namespaces to control their scope and ensure accurate validation.

Statistics on namespace usage

According to a survey by W3Techs, over 80% of websites use XML namespaces in their markup to organize and structure their content effectively.

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