Index: trunk/data/maps.xsd
===================================================================
--- trunk/data/maps.xsd	(revision 11812)
+++ trunk/data/maps.xsd	(revision 13266)
@@ -701,4 +701,6 @@
                             <!-- does imagery server supports JOSM 4326 to 3857 reprojection and non-square queries. Affects showing warnings. -->
                             <xs:element name="epsg4326to3857Supported" minOccurs="0" maxOccurs="1" type="xs:boolean" />
+                            <!-- does imagery server supports tile re-rendering using "/dirty". Defaults to false. -->
+                            <xs:element name="dirty-mode" minOccurs="0" maxOccurs="1" type="xs:boolean" />
                         </xs:choice>
                     </xs:sequence>