[css3-selectors] Typo in Selectors

In Section "2. Selectors" there's the Pattern 'E[hfoo|="en"]' which 
should be 'E[foo|="en"]'.

And another thing:

html|tr:nth-child(-n+6)  /* represents the 6 first rows of XHTML tables */

I couldn't find out what this "|" does there. Is this another type of 
selector? Here again:

html|*:not(:link):not(:visited)

If it is a selector, it isn't well documented, I couldn't find out what 
it's supposed to do (some namespace stuff?).

Nikita Popov