Such information may not only be optional, but may not even be relevant for a particular use of it, such as in the retrieve operation where only the member identifier would be required.
这些信息不仅能为可选的，而且甚至还能与其特定用法相关，例如在检索操作中就只需要成员标识符。
2
Design the domain Identifier management model to make the domain and relevant resources identified and managed uniformly.