Having access to the full power of the parent language can be a problem. This point is well articulated here: http://www.w3.org/2001/tag/doc/leastPower.html htt

Having access to the full power of the parent language can be a problem. This point is well articulated here: http://www.w3.org/2001/tag/doc/leastPower.html http://www.w3.org/2001/tag/doc/leastPower.html