<classSpec ident="att.layerIdent" module="MEI.shared" type="atts">
                        
                        <desc>Attributes that identify the layer to which a feature applies.</desc>
                        
                        <attList org="group">
                           
                           <attDef ident="layer" usage="opt">
                              
                              <desc>Identifies the layer to which a feature applies.</desc>
                              
                              <datatype maxOccurs="unbounded" minOccurs="1">
                                 
                                 <rng:data type="positiveInteger"/>
                                 </datatype>
                              </attDef>
                           </attList>
                        </classSpec>