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Quick Reference Sheets for Webmasters

Quick Reference sheets are packed full of useful information for all webmasters.

HTML Reference Sheet

HTML Version Information

A valid HTML document declares what version of HTML is used in the document. The document type declaration names the document type definition (DTD) in use for the document.

HTML 4.01 specifies three different types of document type declarations that authors must use within their html documents. The DTDs vary in the element they support.

  • The HTML 4.01 Strict DTD includes all elements and attributes that have not been deprecated or do not appear in frameset documents. To specify this DTD within your html document, place the following line at the very beginning:

    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
  • The HTML 4.01 Transitional DTD includes everything in the strict DTD plus deprecated elements and attributes. Use the following DTD in your html document to specify transitional:

    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
  • The HTML 4.01 Frameset DTD includes everything within the transitional DTD plus support for frames. To specify a frametset document type, use the following code:

    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd">




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