Back
Syntax
Study
Editor
Mode:
HTML
CSS
JavaScript
PHP
Reset
Run »
HTML / CSS / JS
<!-- WELL-FORMED: passes basic XML syntax rules VALID: also conforms to a DTD or schema --> <!-- WELL-FORMED (correct) --> <person> <name>Alice</name> <age>30</age> </person> <!-- NOT WELL-FORMED: overlapping elements --> <!-- <person> <name><bold>Alice</name></bold> </person> --> <!-- NOT WELL-FORMED: missing closing tag --> <!-- <person> <name>Alice </person> --> <!-- NOT WELL-FORMED: unquoted attribute --> <!-- <person id=42> <name>Alice</name> </person> --> <!-- WELL-FORMED but NOT VALID against a schema that only allows <name> and <age> as children --> <person> <name>Alice</name> <age>30</age> <nickname>Al</nickname> </person>
Result
Open