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Validation

All documents must have a W3C recommended Doctype and all Markup mustvalidate against that Doctype.

Rationale

While assistive technologies such as screen readers generally do a good job of interpreting invalid HTML there will be less risk of problems arising if the document follows a recognised standard Doctype.

Techniques

Pass:

<!DOCTYPE html>
<html lang="en-GB">

Fail:

<html lang="en-GB">

Tests

 

Procedure Expected Result Type
Validate the page against the W3C Markup Validation Service There must be no errors Tool


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