--- a/labs/openlayers/lib/OpenLayers/Format/Filter.js
+++ b/labs/openlayers/lib/OpenLayers/Format/Filter.js
@@ -1,1 +1,116 @@
+/* Copyright (c) 2006-2010 by OpenLayers Contributors (see authors.txt for 
+ * full list of contributors). Published under the Clear BSD license.  
+ * See http://svn.openlayers.org/trunk/openlayers/license.txt for the
+ * full text of the license. */
 
+/**
+ * @requires OpenLayers/Format/XML.js
+ * @requires OpenLayers/Filter/FeatureId.js
+ * @requires OpenLayers/Filter/Logical.js
+ * @requires OpenLayers/Filter/Comparison.js
+ */
+
+/**
+ * Class: OpenLayers.Format.Filter
+ * Read/Wite ogc:Filter. Create a new instance with the <OpenLayers.Format.Filter>
+ *     constructor.
+ * 
+ * Inherits from:
+ *  - <OpenLayers.Format.XML>
+ */
+OpenLayers.Format.Filter = OpenLayers.Class(OpenLayers.Format.XML, {
+    
+    /**
+     * APIProperty: defaultVersion
+     * {String} Version number to assume if none found.  Default is "1.0.0".
+     */
+    defaultVersion: "1.0.0",
+    
+    /**
+     * APIProperty: version
+     * {String} Specify a version string if one is known.
+     */
+    version: null,
+    
+    /**
+     * Property: parser
+     * {Object} Instance of the versioned parser.  Cached for multiple read and
+     *     write calls of the same version.
+     */
+    parser: null,
+
+    /**
+     * Constructor: OpenLayers.Format.Filter
+     * Create a new parser for Filter.
+     *
+     * Parameters:
+     * options - {Object} An optional object whose properties will be set on
+     *     this instance.
+     */
+    initialize: function(options) {
+        OpenLayers.Format.XML.prototype.initialize.apply(this, [options]);
+    },
+
+    /**
+     * APIMethod: write
+     * Write an ogc:Filter given a filter object.
+     *
+     * Parameters:
+     * filter - {<OpenLayers.Filter>} An filter.
+     * options - {Object} Optional configuration object.
+     *
+     * Returns:
+     * {Elment} An ogc:Filter element node.
+     */
+    write: function(filter, options) {
+        var version = (options && options.version) ||
+                      this.version || this.defaultVersion;
+        if(!this.parser || this.parser.VERSION != version) {
+            var format = OpenLayers.Format.Filter[
+                "v" + version.replace(/\./g, "_")
+            ];
+            if(!format) {
+                throw "Can't find a Filter parser for version " +
+                      version;
+            }
+            this.parser = new format(this.options);
+        }
+        return this.parser.write(filter);
+        //return OpenLayers.Format.XML.prototype.write.apply(this, [root]);
+    },
+    
+    /**
+     * APIMethod: read
+     * Read and Filter doc and return an object representing the Filter.
+     *
+     * Parameters:
+     * data - {String | DOMElement} Data to read.
+     *
+     * Returns:
+     * {<OpenLayers.Filter>} A filter object.
+     */
+    read: function(data) {
+        if(typeof data == "string") {
+            data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
+        }
+        var version = this.version;
+        if(!version) {
+            version = this.defaultVersion;
+        }
+        if(!this.parser || this.parser.VERSION != version) {
+            var format = OpenLayers.Format.Filter[
+                "v" + version.replace(/\./g, "_")
+            ];
+            if(!format) {
+                throw "Can't find a Filter parser for version " +
+                      version;
+            }
+            this.parser = new format(this.options);
+        }
+        var filter = this.parser.read(data);
+        return filter;
+    },
+
+    CLASS_NAME: "OpenLayers.Format.Filter" 
+});
+