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Asked: 2026-05-25T20:51:23+00:00

<?xml version=1.0 ?> <accounts> <1167/> <1328/> <1505/> <1536 default=true /> <1966/> </accounts> When I

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<?xml version="1.0" ?>
<accounts>
    <1167/>
    <1328/>
    <1505/>
    <1536 default="true" />
    <1966/>
</accounts>

When I pass in the above XML at http://www.w3schools.com/XML/xml_validator.asp I get an error stating the line with <1167/> is invalid. I looked at the w3 description for elements, and didn’t see any reason why it should be wrong. I’m sure its a simple mistake so would appreciate any help.

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1 Answer

  1. Editorial Team

    Taken from http://www.w3schools.com/xml/xml_elements.asp

    XML Naming Rules

    XML elements must follow these naming rules:

    Names cannot start with a number or punctuation character

    or (more authoritative) http://www.w3.org/TR/xml/

    Name start characters must have one of the categories Ll, Lu, Lo, Lt, Nl.

    Where the categories starting with L are various classes of “letters” in Unicode and Nl are numbers that looks like a letter, such as a Roman numerals (Ⅰ, Ⅱ, Ⅲ, Ⅳ, Ⅴ…).

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