   &lt;include&gt;&lt;!--   all the descendants of clinical finding, not include itself   --&gt;
            &lt;system value=&quot;http://snomed.info/sct&quot;/&gt;
            &lt;filter&gt;&lt;!--   todo: work this over. what this means is any concepts where they have is-a with 91723000.
               how should this be done?   --&gt;
              &lt;property value=&quot;concept&quot;/&gt;
              &lt;op value=&quot;is-a&quot;/&gt;
              &lt;value value=&quot;91723000&quot;/&gt;
 