Adding a doctype to your webpage 
Doctype is a special declaration at the very top of your webpage source, right above the tag, that informs validators the rules in which to validate your page using, and for modern browsers (IE6+, Firefox, NS6+, Opera, IE5 Mac), whether to display your page in Quirks or Standards mode. Below lists the major doctypes you can deploy on your webpage. All of them enters modern browsers into Standards mode when used. Devsocial.net offers free online tutorials, references and free SEO Tools the world wide web design library.
HTML 4.01 Transitional, Strict, Frameset
HTML 4.01 transitional doctype supports all attributes of HTML 4.01, presentational attributes, deprecated elements, and link targets. It is meant to be used for webpages that are transitioning to HTML 4.01 strict:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
HTML 4.01 Strict is a trimmed down version of HTML 4.01 with emphasis on structure over presentation. Deprecated elements and attributes (including most presentational attributes), frames, and link targets are not allowed. CSS should be used to style all elements:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
HTML 4.01 frameset is identical to Transitional above, except for the use of <frameset> over <body>:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd">
XHTML 1.0 Transitional, Strict, Frameset
Use XHTML 1.0 Transitional when your webpage conforms to basic XHTML rules, but still uses some HTML presentational tags for the sake of viewers that don't support CSS:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
Use XHTML 1.0 Strict when your webpage conforms to XHTML rules and uses CSS for full separation between content and presentation:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
XHTML 1.0 frameset is identical to Transitional above, except in the use of the <frameset> tag over <body>:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">
XHTML 1.1 DTD
XHTML 1.1 declaration. Visit the WC3 site for an overview and what's changed from 1.0:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
Rating:
Capable: 
Date Posted: 2/5/2023
Note: Make sure your page contains a valid doctype for this menu to render properly.
Revision History: Nov 8th, 2023': updated code..
Usage Terms: | Please Read - -> >
Viewed: 57,367
Share our library with others. Spread the love. Share: 
Was this article & Examples Helpful ?
If so you can help us bring this and more to become available for you at anytime. You can help us by donating any amount or Sharing & Following Us. Donate through PayPal.
More useful links:
Price: $3,500 
Free Tools
- Submit Software/Code
Sitemap Generator-
NameServer Lookup (NS) -
( SERP )Search Engine Ranking Position checker 
PHP Form Generator
Generate custom email forms.-
Domain (WHOIS) Lookup Check all domain information, exp date, owner,address. 
Meta Tags Generator Generate All meta tags and get ranked high on Search engines.. 
CPM Advertising Calculator Calculate and estimate your CPM / CPA / CPC.. 
CSS 3 Color Chart View all Known Colors and Their Css Atribute. Ex. #0099FF
FavIcon Generator Generate your own Favicon in seconds. Then Just Place the image.
Table Generator Generate
Tables just clicking the buttons
+ its Copy and Paste.
Dev's Tips
Dev: Ramon Sanchez
TIP: # 251 | Meta Tags
When addingMETA TAGSmake sure you dont over Repeat thekeywordsit wont help with SEO. Keep it Simple dont overdue it...
Contact Developer
Website Ranking Tools
- Help you analyze and improve your Website rankings!
Google Rank Checker Check website Google rank.- Website search engine position
Check website position on search. - Search Engine Optimization Tools - Check how search engines see your Website !
- Search Engine Listing Preview Preview what your site's listing will look like.
- Website Resolution Viewer - View your website at a variety of common resolutions.
- Text Website Viewer
View your website in text-only mode, just as the search engines see it. - XHTML Website Source Tools - Check how search engines see's and affect your Website !
Source Code Viewer
View the source code of a website.- MD5 Encrypter
Encrypt text with MD5 encoding. - HTML Encrypter Encrypt your HTML code to hide it from visitors.
- Website Speed Test Check the loading speed of your site.
- Website owner Lookup See the Domain information and who is it registered to.
- Optimize Html Code Optimize your HTML Source code.
- Other Misc Website Tools - Check how search engines see and affect your Website.
- Website Status analyzer Analyze whether all the five major ports are responding back.
- TXT List Cleaner Clean and remove duplicates from a text list.
Javascript Hit Counter Copy and paste Javascript code to your website and create a web counter.
Browser Details Tool - View your IP address and your browser details.- Send Anonymous Email's.Allows the sending of anonymous e-mails.
- E-mail Image Generator Create an image of your e-mail address to prevent harvesting.