This review of literature on children s conceptions of personality traits examines three assessing methods extensively employed in the past three decades:(a) free descriptions, (b) behavior predictions, both of which were regarded as the main approaches before 1990s, and (c) psychological predictions newly developed in 1990s influenced by the research of theory of mind.

It compares IEC61850 standard with the widely used IEC60870-5-103 protocol from aspect of information modeling, communication model, self-description, isolation of data and services, indicating the different characteristics of these two standards.

Method of self-description and regeneration of testing cases based on error-guessing method(BEGM) was suggested.

Considering the difficulties of the interoperability between devices and of system integration,device self-description technique is put forward,which is used for solving above problems ,and the info-exchange mechanism of interoperability between devices is discussed.