void initializeRegistry() {
Hashtable facets = null;
fRegistry.put("boolean", new BooleanValidator());
DatatypeValidator integerValidator = new IntegerValidator();
fRegistry.put("integer", integerValidator);
fRegistry.put("string", new StringValidator());
fRegistry.put("decimal", new DecimalValidator());
fRegistry.put("float", new FloatValidator());
fRegistry.put("double", new DoubleValidator());
fRegistry.put("timeDuration", new TimeDurationValidator());
fRegistry.put("timeInstant", new TimeInstantValidator());