If users instruct db2 to validate their xml data against a registered xml schema prior to storage , db2 will annotate all nodes in the xml hierarchy with information about the schema types ; otherwise , it will annotate the nodes with default type information 如果用户要求db2在进行存储之前针对注册的xml模式对xml数据进行检验,那么db2将用模式类型信息对xml层次结构中的所有节点进行标注;否则,就用默认的类型信息对节点进行标注。