Small Typo

Hi there,

While researching the syntax of OWL, I came across this tiny, unimportant
typo: "[...] namespace declaration of the XML syntax *dose* not have to
include [,,,]". You can find it located here:
http://www.w3.org/TR/owl-xmlsyntax/apd-example.html#subapd-eg21

Not sure if it's worth updating the document to fix the typo, but just
wanted to let you know anyway.

Regards,
Kelvin Z.