HTML4.01 Strict ARIA Doctype for Validation via W3C Validator
What is the difference of having a DOCTYPE — and BackCompat vs CSS1Compat mode in Chrome, Firefox, and Safari?
CSS3 Box-shadow not working
How to get the doctype declaration using DOM on Xerces 2.8
How to produce valid xhtml/xml output from Oracle ADF
How can the DOCTYPE be changed to force Quirks mode in CMSDesk in Kentico
Do I need the doctype declaration?
Flot charts doctype issues
Script tag before DOCTYPE
What doctypes are available in Yesod Hamlet?
Good starting point for DOCTYPE to use schema.org
eBay listing without DOCTYPE
IE6 changes DOCTYPE to a bad one
link rel=“script” usage
Explanation of the Doctype Syntax