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Editorial Team
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Asked: 2026-05-15T12:31:59+00:00

[a-zA-Z_:]([a-zA-Z0-9_:.])* Would this do?

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[a-zA-Z_:]([a-zA-Z0-9_:.])*

Would this do?

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  1. Editorial Team

    Do you mean XML element names? If so, no, that’s too exclusive, there are lots of valid characters that that doesn’t cover. More in the spec here and here:

    NameStartChar    ::=    ":" | [A-Z] | "_" | [a-z] | [#xC0-#xD6] |
                        [#xD8-#xF6] | [#xF8-#x2FF] | [#x370-#x37D] |
                        [#x37F-#x1FFF] | [#x200C-#x200D] | [#x2070-#x218F] |
                        [#x2C00-#x2FEF] | [#x3001-#xD7FF] | [#xF900-#xFDCF] |
                        [#xFDF0-#xFFFD] | [#x10000-#xEFFFF] 

NameChar         ::=    NameStartChar | "-" | "." | [0-9] | #xB7 |
                        [#x0300-#x036F] | [#x203F-#x2040] 

Name             ::=    NameStartChar (NameChar)*
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