few questions about some less common HTML tags

[Gorgonzola]

can someone please define the following in relation to HTML tables?
<CAPTION>
<COLGROUP>
<TBODY>
<THEAD>

and also the summary attribute of the table tag?

i am very experienced in HTML, but for some reason my school likes to throw in pointless tags that no oneever uses. i've been making webpages for the past 3 years and never required any of these.

can someone enlighten me please? thanks

 

[bjb86s]

When doubt, check the W3C Standards

 

[Gorgonzola]

thanks for that. i found everything i needed to know within the first few paragraphs.