This tool is an ongoing experiment in better HTML checking, and its behavior remains subject to change

Showing results for http://korbinian-polk.de/pp9/

Checker Input

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  1. Error: End of file seen without seeing a doctype first. Expected <!DOCTYPE html>.

    http://korbinian-polk.de/pp9/

  2. Error: Element head is missing a required instance of child element title.

    http://korbinian-polk.de/pp9/

    Content model for element head:
    If the document is an iframe srcdoc document or if title information is available from a higher-level protocol: Zero or more elements of metadata content, of which no more than one is a title element and no more than one is a base element.
    Otherwise: One or more elements of metadata content, of which exactly one is a title element and no more than one is a base element.

  3. Warning: Consider adding a lang attribute to the html start tag to declare the language of this document.

    http://korbinian-polk.de/pp9/

There were errors.

Used the schema for HTML + SVG 1.1 + MathML 3.0 + RDFa 1.1.

Used the HTML parser. Externally specified character encoding was UTF-8.

Total execution time 116 milliseconds.

About this checker • Report an issue • Version: 21.10.12