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Asked: 2026-06-04T04:25:12+00:00

I want to add xmlns:atom to the root element of an XML file, the

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I want to add xmlns:atom to the root element of an XML file, the file already exists, I just want to modify it by adding the adding xmlns. The rest of the files is to be left unchanged. As an example, I have <rss version="2.0"> in file and I want to convert it in to <rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"> using JDOM. How can I do this?

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1 Answer

  1. Editorial Team

    Once you have the input file loaded as a JDOM Document, you can:

    document.getRootElement().addNamespaceDeclaration(
    Namespace.getNamespace("atom", "..."));

    Then, when you output the document it will have the additional namespace declaration.

    Make sure you use the right URI for your Namespace… not ‘…’ …

    See the documentation for addNamespaceDeclaration:

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