I have come across lots of new tags featured on numerous websites that I have never seen before. Do these Tags help search engine ranking?, Here are some Tags below.

<meta name="Revisit-after" content="10">
<meta name="CATEGORY" content="Hotel in Athens">

<meta name="abstract" content="Online reservation for athens hotels holidays, hotels in athens, athens Hotels, hotels in greece, discounts, athens hotel, apartments, travel, hotel">

<meta name="distribution" content="global">
<meta name="classification" content="athens">
<meta name="Scooter" content="athens hotel">

<meta name="SEARCH" content="Hilton, athens, hotels, athens hotels, hotels in athens, holidays,
polis hotel, hotels athens, athens holidays, holiday">

<meta name="Date-Creation-yyyy" content="2003">
<meta name="Yahoo" content="athens hotel and apartments">
<meta name="Dmoz" content="athens hotel and apartments">
<meta name="Altavista" content="hotel in athens">

<!--athens hotels, hotels, athens, greece hotels, athens hotel, hotels in athens, lodging in athens,
holidays, athens holidays, discount hotel in athens, budget hotels in athens, travel athens-->

Hope somebody can help.