--- a/labs/openlayers/lib/OpenLayers/Protocol/SQL.js
+++ b/labs/openlayers/lib/OpenLayers/Protocol/SQL.js
@@ -1,1 +1,89 @@
+/* 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/Protocol.js
+ */
+
+/**
+ * Class: OpenLayers.Protocol.SQL
+ * Abstract SQL protocol class.  Not to be instantiated directly.  Use
+ *     one of the SQL protocol subclasses instead.
+ *
+ * Inherits from:
+ *  - <OpenLayers.Protocol>
+ */
+OpenLayers.Protocol.SQL = OpenLayers.Class(OpenLayers.Protocol, {
+
+    /**
+     * APIProperty: databaseName
+     * {String}
+     */
+    databaseName: 'ol',
+
+    /**
+     * APIProperty: tableName
+     * Name of the database table into which Features should be saved.
+     */
+    tableName: "ol_vector_features",
+
+    /**
+     * Property: postReadFiltering
+     * {Boolean} Whether the filter (if there's one) must be applied after
+     *      the features have been read from the database; for example the
+     *      BBOX strategy passes the read method a BBOX spatial filter, if
+     *      postReadFiltering is true every feature read from the database
+     *      will go through the BBOX spatial filter, which can be costly;
+     *      defaults to true.
+     */
+    postReadFiltering: true,
+
+    /**
+     * Constructor: OpenLayers.Protocol.SQL
+     */
+    initialize: function(options) {
+        OpenLayers.Protocol.prototype.initialize.apply(this, [options]);
+    },
+
+    /**
+     * APIMethod: destroy
+     * Clean up the protocol.
+     */
+    destroy: function() {
+        OpenLayers.Protocol.prototype.destroy.apply(this);
+    },
+
+    /**
+     * APIMethod: supported
+     * This should be overridden by specific subclasses
+     *
+     * Returns:
+     * {Boolean} Whether or not the browser supports the SQL backend
+     */
+    supported: function() {
+        return false;
+    },
+
+    /**
+     * Method: evaluateFilter
+     * If postReadFiltering is true evaluate the filter against the feature
+     * and return the result of the evaluation, otherwise return true.
+     *
+     * Parameters:
+     * {<OpenLayers.Feature.Vector>} The feature.
+     * {<OpenLayers.Filter>} The filter.
+     *
+     * Returns:
+     * {Boolean} true if postReadFiltering if false, the result of the
+     * filter evaluation otherwise.
+     */
+    evaluateFilter: function(feature, filter) {
+        return filter && this.postReadFiltering ?
+            filter.evaluate(feature) : true;
+    },
+
+    CLASS_NAME: "OpenLayers.Protocol.SQL"
+});
+