diff --git a/src/objectliterals.jsdoc b/src/objectliterals.jsdoc
index 1f222add18..346688201a 100644
--- a/src/objectliterals.jsdoc
+++ b/src/objectliterals.jsdoc
@@ -346,6 +346,18 @@
  * @property {ol.Extent|undefined} bbox Extent to use for the BBOX filter.
  */
 
+/**
+ * @typedef {Object} olx.format.WFSWriteTransactionOptions
+ * @property {string} featureNS The namespace URI used for features.
+ * @property {string} featurePrefix The prefix for the feature namespace.
+ * @property {string} featureType The feature type name.
+ * @property {string|undefined} srsName SRS name. No srsName attribute will be
+ *     set on geometries when this is not provided.
+ * @property {string|undefined} handle Handle.
+ * @property {Array.<Object>} nativeElements Native elements. Currently not
+ *     supported.
+ */
+
 /**
  * @typedef {Object} olx.interaction.DoubleClickZoomOptions
  * @property {number|undefined} duration Animation duration in milliseconds. Default is `250`.
diff --git a/src/ol/format/gmlformat.js b/src/ol/format/gmlformat.js
index 291c65c772..d08b6e0e30 100644
--- a/src/ol/format/gmlformat.js
+++ b/src/ol/format/gmlformat.js
@@ -1419,9 +1419,8 @@ ol.format.GML.writeGeometry = function(node, geometry, objectStack) {
  * @param {Node} node Node.
  * @param {ol.Feature} feature Feature.
  * @param {Array.<*>} objectStack Node stack.
- * @private
  */
-ol.format.GML.writeFeature_ = function(node, feature, objectStack) {
+ol.format.GML.writeFeature = function(node, feature, objectStack) {
   var fid = feature.getId();
   if (goog.isDef(fid)) {
     node.setAttribute('fid', fid);
@@ -1437,17 +1436,20 @@ ol.format.GML.writeFeature_ = function(node, feature, objectStack) {
   var properties = feature.getProperties();
   var keys = [], values = [];
   for (var key in properties) {
-    keys.push(key);
-    values.push(properties[key]);
-    if (key == geometryName) {
-      if (!(key in context.serializers[featureNS])) {
-        context.serializers[featureNS][key] = ol.xml.makeChildAppender(
-            ol.format.GML.writeGeometry);
-      }
-    } else {
-      if (!(key in context.serializers[featureNS])) {
-        context.serializers[featureNS][key] = ol.xml.makeChildAppender(
-            ol.format.XSD.writeStringTextNode);
+    var value = properties[key];
+    if (!goog.isNull(value)) {
+      keys.push(key);
+      values.push(value);
+      if (key == geometryName) {
+        if (!(key in context.serializers[featureNS])) {
+          context.serializers[featureNS][key] = ol.xml.makeChildAppender(
+              ol.format.GML.writeGeometry);
+        }
+      } else {
+        if (!(key in context.serializers[featureNS])) {
+          context.serializers[featureNS][key] = ol.xml.makeChildAppender(
+              ol.format.XSD.writeStringTextNode);
+        }
       }
     }
   }
@@ -1455,7 +1457,7 @@ ol.format.GML.writeFeature_ = function(node, feature, objectStack) {
   item.node = node;
   ol.xml.pushSerializeAndPop(/** @type {ol.xml.NodeStackItem} */
       (item), context.serializers,
-      ol.xml.OBJECT_PROPERTY_NODE_FACTORY,
+      ol.xml.makeSimpleNodeFactory(undefined, featureNS),
       values,
       objectStack, keys);
 };
@@ -1475,7 +1477,7 @@ ol.format.GML.writeFeatureMembers_ = function(node, features, objectStack) {
   var serializers = {};
   serializers[featureNS] = {};
   serializers[featureNS][featureType] = ol.xml.makeChildAppender(
-      ol.format.GML.writeFeature_);
+      ol.format.GML.writeFeature);
   var item = goog.object.clone(context);
   item.node = node;
   ol.xml.pushSerializeAndPop(/** @type {ol.xml.NodeStackItem} */
diff --git a/src/ol/format/wfsformat.js b/src/ol/format/wfsformat.js
index 72ee897470..2e9718c748 100644
--- a/src/ol/format/wfsformat.js
+++ b/src/ol/format/wfsformat.js
@@ -6,6 +6,7 @@ goog.require('goog.object');
 goog.require('ol.format.GML');
 goog.require('ol.format.XMLFeature');
 goog.require('ol.format.XSD');
+goog.require('ol.geom.Geometry');
 goog.require('ol.xml');
 
 
@@ -287,6 +288,124 @@ ol.format.WFS.QUERY_SERIALIZERS_ = {
 };
 
 
+/**
+ * @param {Node} node Node.
+ * @param {ol.Feature} feature Feature.
+ * @param {Array.<*>} objectStack Node stack.
+ * @private
+ */
+ol.format.WFS.writeFeature_ = function(node, feature, objectStack) {
+  var context = objectStack[objectStack.length - 1];
+  goog.asserts.assert(goog.isObject(context));
+  var featureType = goog.object.get(context, 'featureType');
+  var featureNS = goog.object.get(context, 'featureNS');
+  var child = ol.xml.createElementNS(featureNS, featureType);
+  node.appendChild(child);
+  ol.format.GML.writeFeature(child, feature, objectStack);
+};
+
+
+/**
+ * @param {Node} node Node.
+ * @param {number|string} fid Feature identifier.
+ * @param {Array.<*>} objectStack Node stack.
+ * @private
+ */
+ol.format.WFS.writeOgcFidFilter_ = function(node, fid, objectStack) {
+  var filter = ol.xml.createElementNS('http://www.opengis.net/ogc', 'Filter');
+  var child = ol.xml.createElementNS('http://www.opengis.net/ogc', 'FeatureId');
+  filter.appendChild(child);
+  child.setAttribute('fid', fid);
+  node.appendChild(filter);
+};
+
+
+/**
+ * @param {Node} node Node.
+ * @param {ol.Feature} feature Feature.
+ * @param {Array.<*>} objectStack Node stack.
+ * @private
+ */
+ol.format.WFS.writeDelete_ = function(node, feature, objectStack) {
+  var context = objectStack[objectStack.length - 1];
+  goog.asserts.assert(goog.isObject(context));
+  var featureType = goog.object.get(context, 'featureType');
+  var featurePrefix = goog.object.get(context, 'featurePrefix');
+  node.setAttribute('typeName', featurePrefix + ':' + featureType);
+  var fid = feature.getId();
+  if (goog.isDef(fid)) {
+    ol.format.WFS.writeOgcFidFilter_(node, fid, objectStack);
+  }
+};
+
+
+/**
+ * @param {Node} node Node.
+ * @param {ol.Feature} feature Feature.
+ * @param {Array.<*>} objectStack Node stack.
+ * @private
+ */
+ol.format.WFS.writeUpdate_ = function(node, feature, objectStack) {
+  var context = objectStack[objectStack.length - 1];
+  goog.asserts.assert(goog.isObject(context));
+  var featureType = goog.object.get(context, 'featureType');
+  var featurePrefix = goog.object.get(context, 'featurePrefix');
+  node.setAttribute('typeName', featurePrefix + ':' + featureType);
+  var fid = feature.getId();
+  if (goog.isDef(fid)) {
+    var keys = feature.getKeys();
+    var values = [];
+    for (var i = 0, ii = keys.length; i < ii; i++) {
+      var value = feature.get(keys[i]);
+      if (goog.isDef(value)) {
+        values.push({name: keys[i], value: value});
+      }
+    }
+    ol.xml.pushSerializeAndPop({node: node},
+        ol.format.WFS.TRANSACTION_SERIALIZERS_,
+        ol.xml.makeSimpleNodeFactory('Property'), values,
+        objectStack);
+    ol.format.WFS.writeOgcFidFilter_(node, fid, objectStack);
+  }
+};
+
+
+/**
+ * @param {Node} node Node.
+ * @param {Object} pair Property name and value.
+ * @param {Array.<*>} objectStack Node stack.
+ * @private
+ */
+ol.format.WFS.writeProperty_ = function(node, pair, objectStack) {
+  var name = ol.xml.createElementNS('http://www.opengis.net/wfs', 'Name');
+  node.appendChild(name);
+  ol.format.XSD.writeStringTextNode(name, pair.name);
+  if (goog.isDefAndNotNull(pair.value)) {
+    var value = ol.xml.createElementNS('http://www.opengis.net/wfs', 'Value');
+    node.appendChild(value);
+    if (pair.value instanceof ol.geom.Geometry) {
+      ol.format.GML.writeGeometry(value, pair.value, objectStack);
+    } else {
+      ol.format.XSD.writeStringTextNode(value, pair.value);
+    }
+  }
+};
+
+
+/**
+ * @type {Object.<string, Object.<string, ol.xml.Serializer>>}
+ * @private
+ */
+ol.format.WFS.TRANSACTION_SERIALIZERS_ = {
+  'http://www.opengis.net/wfs': {
+    'Insert': ol.xml.makeChildAppender(ol.format.WFS.writeFeature_),
+    'Update': ol.xml.makeChildAppender(ol.format.WFS.writeUpdate_),
+    'Delete': ol.xml.makeChildAppender(ol.format.WFS.writeDelete_),
+    'Property': ol.xml.makeChildAppender(ol.format.WFS.writeProperty_)
+  }
+};
+
+
 /**
  * @param {Node} node Node.
  * @param {string} featureType Feature type.
@@ -428,3 +547,48 @@ ol.format.WFS.prototype.writeGetFeature = function(options) {
   ol.format.WFS.writeGetFeature_(node, options.featureTypes, [context]);
   return node;
 };
+
+
+/**
+ * @param {Array.<ol.Feature>} inserts The features to insert.
+ * @param {Array.<ol.Feature>} updates The features to update.
+ * @param {Array.<ol.Feature>} deletes The features to delete.
+ * @param {olx.format.WFSWriteTransactionOptions} options Write options.
+ * @return {ArrayBuffer|Node|Object|string} Result.
+ */
+ol.format.WFS.prototype.writeTransaction = function(inserts, updates, deletes,
+    options) {
+  var node = ol.xml.createElementNS('http://www.opengis.net/wfs',
+      'Transaction');
+  node.setAttribute('service', 'WFS');
+  node.setAttribute('version', '1.1.0');
+  if (goog.isDef(options)) {
+    if (goog.isDef(options.handle)) {
+      node.setAttribute('handle', options.handle);
+    }
+  }
+  ol.xml.setAttributeNS(node, 'http://www.w3.org/2001/XMLSchema-instance',
+      'xsi:schemaLocation', this.schemaLocation_);
+  if (goog.isDefAndNotNull(inserts)) {
+    ol.xml.pushSerializeAndPop({node: node, featureNS: options.featureNS,
+      featureType: options.featureType},
+    ol.format.WFS.TRANSACTION_SERIALIZERS_,
+    ol.xml.makeSimpleNodeFactory('Insert'), inserts,
+    []);
+  }
+  if (goog.isDefAndNotNull(updates)) {
+    ol.xml.pushSerializeAndPop({node: node, featureNS: options.featureNS,
+      featureType: options.featureType, featurePrefix: options.featurePrefix},
+    ol.format.WFS.TRANSACTION_SERIALIZERS_,
+    ol.xml.makeSimpleNodeFactory('Update'), updates,
+    []);
+  }
+  if (goog.isDefAndNotNull(deletes)) {
+    ol.xml.pushSerializeAndPop({node: node, featureNS: options.featureNS,
+      featureType: options.featureType, featurePrefix: options.featurePrefix},
+    ol.format.WFS.TRANSACTION_SERIALIZERS_,
+    ol.xml.makeSimpleNodeFactory('Delete'), deletes,
+    []);
+  }
+  return node;
+};
diff --git a/old/test/spec/ol/parser/ogc/xml/wfs_v1/TransactionMulti.xml b/test/spec/ol/format/wfs/TransactionMulti.xml
similarity index 84%
rename from old/test/spec/ol/parser/ogc/xml/wfs_v1/TransactionMulti.xml
rename to test/spec/ol/format/wfs/TransactionMulti.xml
index 22c0886045..1154cb38c0 100644
--- a/old/test/spec/ol/parser/ogc/xml/wfs_v1/TransactionMulti.xml
+++ b/test/spec/ol/format/wfs/TransactionMulti.xml
@@ -1,11 +1,11 @@
-<wfs:Transaction xmlns:wfs="http://www.opengis.net/wfs" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" service="WFS" version="1.0.0" xsi:schemaLocation="http://www.opengis.net/wfs http://schemas.opengis.net/wfs/1.0.0/WFS-transaction.xsd">
+<wfs:Transaction xmlns:wfs="http://www.opengis.net/wfs" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" service="WFS" version="1.1.0" xsi:schemaLocation="http://www.opengis.net/wfs http://schemas.opengis.net/wfs/1.1.0/wfs.xsd">
     <wfs:Insert>
         <feature:states xmlns:feature="http://www.openplans.org/topp">
             <feature:the_geom>
                 <gml:MultiPoint xmlns:gml="http://www.opengis.net/gml">
                     <gml:pointMember>
                         <gml:Point>
-                            <gml:coordinates decimal="." cs="," ts=" ">1,2</gml:coordinates>
+                            <gml:pos>1 2</gml:pos>
                         </gml:Point>
                     </gml:pointMember>
                 </gml:MultiPoint>
@@ -20,7 +20,7 @@
                 <gml:MultiPoint xmlns:gml="http://www.opengis.net/gml">
                     <gml:pointMember>
                         <gml:Point>
-                            <gml:coordinates decimal="." cs="," ts=" ">1,2</gml:coordinates>
+                            <gml:pos>1 2</gml:pos>
                         </gml:Point>
                     </gml:pointMember>
                 </gml:MultiPoint>
@@ -42,4 +42,4 @@
             <ogc:FeatureId fid="fid.37"/>
         </ogc:Filter>
     </wfs:Delete>
-</wfs:Transaction>
\ No newline at end of file
+</wfs:Transaction>
diff --git a/test/spec/ol/format/wfsformat.test.js b/test/spec/ol/format/wfsformat.test.js
index cb500361c0..d6e13ef40b 100644
--- a/test/spec/ol/format/wfsformat.test.js
+++ b/test/spec/ol/format/wfsformat.test.js
@@ -176,9 +176,69 @@ describe('ol.format.WFS', function() {
 
   });
 
+  describe('when writing out a Transaction request', function() {
+
+    it('creates a handle', function() {
+      var text =
+          '<wfs:Transaction xmlns:wfs="http://www.opengis.net/wfs" ' +
+          'xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" ' +
+          'service="WFS" version="1.1.0" handle="handle_t" ' +
+          'xsi:schemaLocation="http://www.opengis.net/wfs ' +
+          'http://schemas.opengis.net/wfs/1.1.0/wfs.xsd"/>';
+      var serialized = new ol.format.WFS().writeTransaction(null, null, null,
+          {handle: 'handle_t'});
+      expect(serialized).to.xmleql(ol.xml.load(text));
+    });
+
+  });
+
+  describe('when writing out a Transaction request', function() {
+    var text;
+    before(function(done) {
+      afterLoadText('spec/ol/format/wfs/TransactionMulti.xml', function(xml) {
+        text = xml;
+        done();
+      });
+    });
+
+    it('creates the correct transaction body', function() {
+      var format = new ol.format.WFS();
+      var insertFeature = new ol.Feature({
+        the_geom: new ol.geom.MultiPoint([[1, 2]]),
+        foo: 'bar',
+        nul: null
+      });
+      insertFeature.setGeometryName('the_geom');
+      var inserts = [insertFeature];
+      var updateFeature = new ol.Feature({
+        the_geom: new ol.geom.MultiPoint([[1, 2]]),
+        foo: 'bar',
+        // null value gets Property element with no Value
+        nul: null,
+        // undefined value means don't create a Property element
+        unwritten: undefined
+      });
+      updateFeature.setId('fid.42');
+      var updates = [updateFeature];
+
+      var deleteFeature = new ol.Feature();
+      deleteFeature.setId('fid.37');
+      var deletes = [deleteFeature];
+      var serialized = format.writeTransaction(inserts, updates, deletes, {
+        featureNS: 'http://www.openplans.org/topp',
+        featureType: 'states',
+        featurePrefix: 'topp'
+      });
+      expect(serialized).to.xmleql(ol.xml.load(text));
+    });
+
+  });
+
 });
 
 
 goog.require('ol.xml');
+goog.require('ol.Feature');
+goog.require('ol.geom.MultiPoint');
 goog.require('ol.geom.MultiPolygon');
 goog.require('ol.format.WFS');