Crap. This one should look a little better.
<rules name="SomeBusinessObject">
<validate rule="mustkey">Field Name</validate>
<validate rule="range" low="1" high="100">field Name2</validate>
<validate rule="other" class="className">field Name3</validate>
<validate rule="mask" mask="(999)999-9999">Field Name4</validate>
</rules>
<errors name="SomeBusinessObject">
<message rule="mustkey">Please fill in the field #fieldname#</message>
<message rule="range">Please select a number between #low# and #high#</message>
</errors>
