https://communities.bentley.com/products/geospatial/desktop/f/bentley-map-forum/94939/xfm-xusecriteria-for-xml-type-attributehi all, i need to check xml attribute if is is empty or not. when i use: &lt;Style useCriteria=&quot;strlen(&amp;quot;[my_feature:my_list]&amp;quot;) &amp;gt; 0&quot;&gt;myType&lt;/Style&gt; the strange behaviour appears: in case my list is empty. strlen == 0 (thats ok), ifen-USTelligent Community 12https://communities.bentley.com/thread/276007?ContentTypeID=1Tue, 25 Feb 2014 14:42:13 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:cd11b7b6-7d74-4ea6-9bfe-af5111cddd36cdalesandro<p>Jan,</p> <p>Can you try a useCriteria like below for the multi row case?</p> <p>[System.String.IndexOf(&quot;[my_feature:my_list]&quot;,&quot;&lt;row&quot;)]!=[System.String.LastIndexOf(&quot;[my_feature:my_list]&quot;,&quot;&lt;row&quot;)]</p> <p>Regards,</p> <p>Chris</p><div style="clear:both;"></div>https://communities.bentley.com/thread/276004?ContentTypeID=1Tue, 25 Feb 2014 14:37:10 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:52e9c173-d961-4f38-805c-57d2fbe5e86dJan Vagner<p>it seems like it depend on xml fragment lenght .. xfm engine is not able to return xml attribute string value when lenght is more than 255 chars long. my workaroud is: create c-expresion function and get feature attribute directly via xfm feature manager and groupname (XFM API). greetings Jan</p><div style="clear:both;"></div>