--- a/labs/openlayers/lib/OpenLayers/Filter/FeatureId.js
+++ b/labs/openlayers/lib/OpenLayers/Filter/FeatureId.js
@@ -1,1 +1,82 @@
+/* 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/Filter.js
+ */
+
+/**
+ * Class: OpenLayers.Filter.FeatureId
+ * This class represents a ogc:FeatureId Filter, as being used for rule-based SLD
+ * styling
+ * 
+ * Inherits from
+ * - <OpenLayers.Filter>
+ */
+OpenLayers.Filter.FeatureId = OpenLayers.Class(OpenLayers.Filter, {
+
+    /** 
+     * APIProperty: fids
+     * {Array(String)} Feature Ids to evaluate this rule against. To be passed
+     * To be passed inside the params object.
+     */
+    fids: null,
+    
+    /** 
+     * Constructor: OpenLayers.Filter.FeatureId
+     * Creates an ogc:FeatureId rule.
+     *
+     * Parameters:
+     * options - {Object} An optional object with properties to set on the
+     *           rule
+     * 
+     * Returns:
+     * {<OpenLayers.Filter.FeatureId>}
+     */
+    initialize: function(options) {
+        this.fids = [];
+        OpenLayers.Filter.prototype.initialize.apply(this, [options]);
+    },
+
+    /**
+     * APIMethod: evaluate
+     * evaluates this rule for a specific feature
+     * 
+     * Parameters:
+     * feature - {<OpenLayers.Feature>} feature to apply the rule to.
+     *           For vector features, the check is run against the fid,
+     *           for plain features against the id.
+     * 
+     * Returns:
+     * {Boolean} true if the rule applies, false if it does not
+     */
+    evaluate: function(feature) {
+        for (var i=0, len=this.fids.length; i<len; i++) {
+            var fid = feature.fid || feature.id;
+            if (fid == this.fids[i]) {
+                return true;
+            }
+        }
+        return false;
+    },
+    
+    /**
+     * APIMethod: clone
+     * Clones this filter.
+     * 
+     * Returns:
+     * {<OpenLayers.Filter.FeatureId>} Clone of this filter.
+     */
+    clone: function() {
+        var filter = new OpenLayers.Filter.FeatureId();
+        OpenLayers.Util.extend(filter, this);
+        filter.fids = this.fids.slice();
+        return filter;
+    },
+    
+    CLASS_NAME: "OpenLayers.Filter.FeatureId"
+});
+