Some questions about HTC, HTA and XHTML

[Mgccl]

I have some problem to understand HTC and HTA
1.what HTC and HTA are for?
2.is HTC just a kind of version of DOM that IE 5 offers?
3.what's the special things that can be done by HTC?
4.an anyone give me a breif history of HTC and HTA?
5.Does anyone in the world ever use those technology?If so, who use it? 6.what's the benifit of using it?

and some XHTML quesions
7.which XHTML version is recommendation by W3C right now, 1.0,1.1 or 2.0.?8.If all of them are recommended, what's the different between them and which one is used most by general public?
9.which one is widely supported by the most popular browsers?
Thx a lot to answer these wordy questions.

[Charles]

7: 1.0 and 1.1 are W3C Recommendations. 2 is still a Working Draft. See http://www.w3.org/MarkUp/ for the differences. I don't know which one is most used right now but you should know that none of them are compatable with HTML and HTML browsers. On the web you should be using HTML 4.01 Strict.

[Mgccl]

thanks a lot, I mean is they anyone who use HTC or something? like no one cares about it in the web......

[ray326]

http://www.vladdy.net/demos/iepseudoclassesfix.html

[wav syntax]

HTC files are HyperText Components, basically in XML format it's a script, kinda like a .dll for HTAs (HyperText Applications) and extremely fun to toy with, If I'm not mistaken they're what IE specific coders can use to create behaqvors for custom made HTML elements e.g <custom:tag>xmlns:custom</custom:tag>. I've made an HTC once before, it's like creating a class or a function, they can except arguments through custom tag attributes in the HTML document, just another way Windows allows you to re-program it's interface basically.