What are all the valid self-closing elements in XHTML (as implemented by the major browsers)?

Question

What are all the valid self-closing elements (e.g.
) in XHTML (as implemented by the major browsers)?

I know that XHTML technically allows any element to

Answer 1

Better question would be: what tags can be self-closed even in HTML mode without affecting code? Answer: only those that have empty content (are void). According to HTML specs the following elements are void:

area, base, br, col, embed, hr, img, input, keygen, link, menuitem, meta, param, source, track, wbr

Older version of specification also listed command. Besides, according to various sources the following obsolete or non-standard tags are void:

basefont, bgsound, frame, isindex