Additional documentation for the WMTS layer (see #2637).

git-svn-id: http://svn.openlayers.org/trunk/openlayers@10389 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Layer/WMTS.js

@@ -19,7 +19,7 @@ OpenLayers.Layer.WMTS = OpenLayers.Class(OpenLayers.Layer.Grid, {
     
     /**
      * APIProperty: isBaseLayer
-     * {Boolean}
+     * {Boolean} The layer will be considered a base layer.  Default is true.
      */
     isBaseLayer: true,
 
@@ -37,13 +37,14 @@ OpenLayers.Layer.WMTS = OpenLayers.Class(OpenLayers.Layer.Grid, {
     
     /**
      * APIProperty: url
-     * {String} The base URL for the WMTS service.
+     * {String} The base URL for the WMTS service.  Must be provided.
      */
     url: null,
 
     /**
      * APIProperty: layer
-     * {String} The layer identifier advertised by the WMTS service.
+     * {String} The layer identifier advertised by the WMTS service.  Must be 
+     *     provided.
      */
     layer: null,
     
@@ -68,7 +69,10 @@ OpenLayers.Layer.WMTS = OpenLayers.Class(OpenLayers.Layer.Grid, {
     /**
      * APIProperty: tileOrigin
      * {<OpenLayers.LonLat>} The top-left corner of the tile matrix in map 
-     *     units.
+     *     units.  If the tile origin for each matrix in a set is different,
+     *     the <matrixIds> should include a topLeftCorner property.  If
+     *     not provided, the tile origin will default to the top left corner
+     *     of the layer <maxExtent>.
      */
     tileOrigin: null,
     
@@ -153,6 +157,7 @@ OpenLayers.Layer.WMTS = OpenLayers.Class(OpenLayers.Layer.Grid, {
      * Required configuration properties:
      * url - {String} The base url for the service.  See the <url> property.
      * layer - {String} The layer identifier.  See the <layer> property.
+     * style - {String} The layer style identifier.  See the <style> property.
      * matrixSet - {String} The tile matrix set identifier.  See the <matrixSet>
      *     property.
      *