Why are namespaces used in XML documents?

Namespaces make it easier to come up with unique names. Imagine how hard it would be to name your next child if the name had to be unique across the face of the earth.

They serve a similar purpose as namespaces in the .NET Framework, except the context is the XML markup.

Namespaces allow the editor/development environment to show appropriate intellisense-like feedback.

In WPF, there are some namespaces which are specifically looked for by the compiler/run-time (they are actually hard-coded within the .NET Framework).

As you can see, the advantages are primarily for the developer(s), just like other namespaces.

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