'Create an object based on the root tag name.
@param schema: A schema object.
@type schema: L{schema.Schema}
@param name: The name.
@type name: str
@return: The created object.
@rtype: L{XBuiltin}'

@classmethod
def create(cls, schema, name):

    fn = cls.tags.get(name)
    if (fn is not None):
        return fn(schema, name)
    else:
        return XBuiltin(schema, name)
