builder.setName("target");
builder.addAttribute("areaOfInfluence", areaOfInfluence);
builder.addAttribute("concatenated", concatType);
FeatureType targetType = builder.feature();
AttributeDescriptor targetFeature = tf.createAttributeDescriptor(targetType, targetType
.getName(), 0, Integer.MAX_VALUE, true, null);
// create the mapping definition
List attMappings = new LinkedList();