New(ish) META tags in HTML?

[Winchester]

<META name="description" content="xxxxxxx remodeling contractor provides home remodeling, handyman service and decks to homeowners.">
<META name="keywords" content="xxxxxxxx remodeling, xxxxxxx handyman, kitchen remodeling, decks, flooring, fence, renovation">
<META name="Classification" content="home remodeling contractor">
<META name="robots" content="ALL, INDEX, FOLLOW">
<META name="revisit-after" content="15 days">
<META name="distribution" content="global">
<META content="http://www.xxxxxxxxxxxxx.com" name="description">
<META content="rating" name="general">
<META content="www.xxxxxxxxxx.com" name="Author">
<meta name="google-site-verification" content="ppq0gkWvDY1PL67MMYEIxXgHUg-YhOC2GVVFv1GhF0s" />
<META NAME='DC.Title' CONTENT="Production Construction - xxxxxx Remodeling Contractor, Handyman, Deck Contractors">
<META NAME='DC.Subject' CONTENT="xxxxxx remodeling contractor provides home remodeling, handyman service and decks to homeowners.">
<META NAME='DC.Description' CONTENT="xxxxxxxxxx remodeling, durham handyman, kitchen remodeling, decks, flooring, fence, renovation">



I have been out of the whole website thing for a few years now, but am getting back into it since starting a website for my business.

However, I'm noticing new META tags on other people's sites that I don't think were really in use at all back when I was into this stuff. (obviously the first two were common, but not the rest of those)

What is their main purpose? For search engine robots/spiders/whatever? If I add these to my site is it going to help in my search rankings?

[nEighter]

I know other search engines use them, and google does to a point, so I say do it, at least you will have them in place for the search engines that need them.

[Len]

Yep, nothing new on that list. Just that none of the big search engine give them much weight.

Here are two references that talk on particular about the DC ones and them making metadata standards.

http://en.wikipedia.org/wiki/Dublin_Core
http://dublincore.org/

http://googlewebmastercentral.blogspot.com/2009/09/google-does-not-use-keywords-meta-tag.html

[y.painting]

Google does not use the keywords meta tag in web ranking. (http://googlewebmastercentral.blogspot.com/2009/09/google-does-not-use-keywords-meta-tag.html)