That doesn't look like the tags, more like template functions (as the name indicates). Stuff like xf:if (conditionals), xf:macro, xf:css, etc. is missing, whereas you could call I believe everything there with name($params).
i dont have access to the php files as im just an administrator and dont host the site, can somebody list the functions and tags? it would be nice to atleast know what functions and tags exist. is there a toLowerCase function for example? because thats something i could use right now.