This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
Remove the middle part and it becomes more understandable: serializers and deserializers provide the encoding and decoding of data on runtime by mapping XML elements to target application objects and vice versa In more simple terms, serializers are responsible for taking a <myobject><id>123</id></myobject> and turning it into an instance of com.foobar.MyObject with id "123". Deserializers are responsible for reversing the above process.