testing/web-platform/tests/conformance-checkers/html/attributes/data/not-xml-serializable-novalid.html


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<!doctype html>
<meta charset=utf-8>
<title>starts with the string "data-", has at least one character after the hyphen, is XML-compatible, and contains no uppercase ASCII letters</title>
<p data-z:foo=""><!-- not serializable as XML -->