in tapestry we can use the component in two ways
<t:type="grid" t:source="persons" t:row="person" t:encoder="personEncoder" t:include="id,firstname,lastname,startdate" t:add="delete"\>
or we can use
<t:grid source="persons" row="person" encoder="personEncoder" include="id,firstname,lastname,startdate" add="delete"></t:grid>
So my question is that is there any difference ...