Please see: https://github.com/kevinSuttle/html-meta-tags, thanks for the idea @dandv!
Copied from http://code.lancepollard.com/complete-list-of-html-meta-tags/
<meta charset="UTF-8">
<meta name="keywords" content="your, tags">
<meta name="description" content="150 words">
<meta name="subject" content="your website"s subject">
<meta name="copyright" content="company name">
<meta name="language" content="ES">
<meta name="robots" content="index,follow">
<meta name="revised" content="Sunday, July 18th, 2010, 5:15 pm">
<meta name="abstract" content="">
<meta name="topic" content="">
<meta name="summary" content="">
<meta name="Classification" content="Business">
<meta name="author" content="name, [email protected]">
<meta name="designer" content="">
<meta name="reply-to" content="[email protected]">
<meta name="owner" content="">
<meta name="url" content="http://www.websiteaddrress.com">
<meta name="identifier-URL" content="http://www.websiteaddress.com">
<meta name="directory" content="submission">
<meta name="pagename" content="jQuery Tools, Tutorials and Resources - O'Reilly Media">
<meta name="category" content="">
<meta name="coverage" content="Worldwide">
<meta name="distribution" content="Global">
<meta name="rating" content="General">
<meta name="revisit-after" content="7 days">
<meta name="subtitle" content="This is my subtitle">
<meta name="target" content="all">
<meta name="HandheldFriendly" content="True">
<meta name="MobileOptimized" content="320">
<meta name="date" content="Sep. 27, 2010">
<meta name="search_date" content="2010-09-27">
<meta name="DC.title" content="Unstoppable Robot Ninja">
<meta name="ResourceLoaderDynamicStyles" content="">
<meta name="medium" content="blog">
<meta name="syndication-source" content="https://mashable.com/2008/12/24/free-brand-monitoring-tools/">
<meta name="original-source" content="https://mashable.com/2008/12/24/free-brand-monitoring-tools/">
<meta name="verify-v1" content="dV1r/ZJJdDEI++fKJ6iDEl6o+TMNtSu0kv18ONeqM0I=">
<meta name="y_key" content="1e39c508e0d87750">
<meta name="pageKey" content="guest-home">
<meta itemprop="name" content="jQTouch">
<meta http-equiv="Expires" content="0">
<meta http-equiv="Pragma" content="no-cache">
<meta http-equiv="Cache-Control" content="no-cache">
<meta http-equiv="imagetoolbar" content="no">
<meta http-equiv="x-dns-prefetch-control" content="off"><meta name="apple-mobile-web-app-title" content="My App"> <!-- New in iOS6 -->
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-touch-fullscreen" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<meta name="format-detection" content="telephone=no">
<meta name="viewport" content="width=device-width; content="width = 320; initial-scale=1.0; maximum-scale=1.0; user-scalable=yes; target-densitydpi=160dpi">
<link href="/apple-touch-icon.png" rel="apple-touch-icon" type="image/png">
<link href="touch-icon-ipad.png" rel="apple-touch-icon" sizes="72x72">
<link href="touch-icon-iphone4.png" rel="apple-touch-icon" sizes="114x114">
<link href="/startup.png" rel="apple-touch-startup-image">
<link href="http://github.com/images/touch-icon-iphone4.png" sizes="114x114" rel="apple-touch-icon-precomposed">
<link href="http://github.com/images/touch-icon-ipad.png" sizes="72x72" rel="apple-touch-icon-precomposed">
<link href="http://github.com/images/apple-touch-icon-57x57.png" sizes="57x57" rel="apple-touch-icon-precomposed"><link rel="mask-icon" href="website_icon.svg" color="red"><meta http-equiv="Page-Enter" content="RevealTrans(Duration=2.0,Transition=2)">
<meta http-equiv="Page-Exit" content="RevealTrans(Duration=3.0,Transition=12)">
<meta name="mssmarttagspreventparsing" content="true">
<meta content="IE=edge,chrome=1" http-equiv="X-UA-Compatible"/>
<meta name="msapplication-starturl" content="http://blog.reybango.com/about/">
<meta name="msapplication-window" content="width=800;height=600">
<meta name="msapplication-navbutton-color" content="red">
<meta name="application-name" content="Rey Bango Front-end Developer">
<meta name="msapplication-tooltip" content="Launch Rey Bango"s Blog">
<meta name="msapplication-task" content="name=About;action-uri=/about/;icon-uri=/images/about.ico">
<meta name="msapplication-task" content="name=The Big List;action-uri=/the-big-list-of-javascript-css-and-html-development-tools-libraries-projects-and-books/;icon-uri=/images/list_links.ico">
<meta name="msapplication-task" content="name=jQuery Posts;action-uri=/category/jquery/;icon-uri=/images/jquery.ico">
<meta name="msapplication-task" content="name=Start Developing;action-uri=/category/javascript/;icon-uri=/images/script.ico">
<meta name="msvalidate.01" content="6E3AD52DC176461A3C81DD6E98003BC9">
<meta http-equiv="cleartype" content="on"><meta name="application-name" content=" Contoso" />
<meta name="msapplication-TileColor" content=" #009900" />
<meta name="msapplication-square70x70logo" content="images/smalltile.png" />
<meta name="msapplication-square150x150logo" content="images/mediumtile.png" />
<meta name="msapplication-wide310x150logo" content="images/widetile.png" />
<meta name="msapplication-square310x310logo" content="images/largetile.png" />
<meta name="msapplication-notification" content="frequency=30; polling-uri=notifications/contoso1.xml;
polling-uri2=notifications/contoso2.xml; polling-uri3=notifications/contoso3.xml" /><meta name="blogcatalog"><meta name="csrf-param" content="authenticity_token">
<meta name="csrf-token" content="/bZVwvomkAnwAI1Qd37lFeewvpOIiackk9121fFwWwc="><link rel="alternate" type="application/rss+xml" title="RSS" href="http://feeds.feedburner.com/martini">
<link rel="alternate" type="application/atom+xml" title="Atom 0.3" href="https://example.com/feed.atom">
<link rel="shortcut icon" type="image/ico" href="/favicon.ico">
<link rel="fluid-icon" type="image/png" href="/fluid-icon.png">
<link rel="me" type="text/html" href="http://google.com/profiles/thenextweb">
<link rel="shortlink" href="http://blog.unto.net/?p=353">
<link rel="archives" title="May 2003" href="http://blog.unto.net/2003/05/">
<link rel="index" title="DeWitt Clinton" href="http://blog.unto.net/">
<link rel="start" title="Pattern Recognition 1" href="http://blog.unto.net/photos/pattern_recognition_1_about/">
<link rel="bookmark"title="Styleguide" href="http://paulrobertlloyd.com/about/styleguide/">
<link rel="search" href="/search.xml" type="application/opensearchdescription+xml" title="Viatropos">
<link rel="self" type="application/atom+xml" href="http://www.syfyportal.com/atomFeed.php?page=3">
<link rel="first" href="http://www.syfyportal.com/atomFeed.php">
<link rel="next" href="http://www.syfyportal.com/atomFeed.php?page=4">
<link rel="previous" href="http://www.syfyportal.com/atomFeed.php?page=2">
<link rel="last" href="http://www.syfyportal.com/atomFeed.php?page=147">
<link rel="canonical" href="http://smallbiztrends.com/2010/06/9-things-to-do-before-entering-social-media.html">
<link rel="EditURI" type="application/rsd+xml" title="RSD" href="http://smallbiztrends.com/xmlrpc.php?rsd">
<link rel="pingback" href="http://smallbiztrends.com/xmlrpc.php">
<link rel="stylesheet" media="only screen and (max-device-width: 480px)" href="http://wordpress.org/style/iphone.css" type="text/css">
<link rel="wlwmanifest" href="http://www.example.com/wp-includes/wlwmanifest.xml" type="application/wlwmanifest+xml">
<link rel="help" title="FAQ" href="/faq">
<link rel="logo" type="image/svg" href="https://playfoursquare.s3.amazonaws.com/press/logo/foursquare-logo.svg">
<link rel="P3Pv1" href="/w3c/p3p.xml">
<link rel="publisher" href="https://plus.google.com/115081025762845243709/">
<link rel="image_src" href="http://du3itj18e4z0b.cloudfront.net/7b29fe/images/icon-facebook.gif" type="image/jpeg">
<link rel="author" href="humans.txt" type="text/plain">
<link href="http://thenextweb.com/2009/01/08/how-to-snap-up-that-twitter-username-youve-always-wanted/" rel="original-source">
<link rel="profile" title="Microformats" href="http://microformats.org/profile/specs/">
<link rel="profile" href="http://gmpg.org/xfn/11">
Hi
You have written a lot of meta name attributes of which many of are not defined meta names. Like:
So, can you please let me know, how it becomes possible to define these lot of meta names?
Is there any possibility of creating more like this?
If these are not registered then how it is possible for search engine bots to crawl all these undefined meta names?
Hope you got my point, please clarify the doubts.
thanks