s why there is benefit in having 
an ontology which has general and domain specific rules which can catch 
some larger percentage.

&gt; &gt;
&gt; &gt; &gt; &gt;
&gt; &gt; &gt; &gt; Note also that having the data entry clerk check this
&gt; &gt; &gt; &gt; constraint is not a
&gt; &gt; &gt; &gt; practical solution.  Typos happen, humans make errors.
&gt; &gt; &gt;
&gt; &gt; &gt;MW: This is a different case. Adding checks on data entry is
&gt; &gt; &gt;quite common. But it is not considered part of the static