Unfortunately, for the compiler to catch every error of this
nature would require that all HTML tags known to work in any
environment would have to be encoded in the compiler.
For example, the compiler would have to know that a tag of
<my_section> was an invalid tag only by knowing that it
wasn't a valid tag in any syntax.
Note that once XML is introduced into consideration, ANY tag
is valid...which means there is no way for the compiler to
identify a tag as NOT valid...
Unlike other formal computing languages, HTML is open and
this in-turn prevents the SurferScript compiler from
catching syntax/spelling/keying errors like these...