In order to mechanize the processing of natural language, the linguist must make the machine interpret the meaning, or semantic content of the language, in some way or other. This means that the machine should extract not only syntactic but also semantic information from the source sentence through the analysis of it. In this paper, the authors describe their opinions as to the structure of language from the viewpoint of mechanical processing. Then two methods of introducing semantic information into the analysis process are proposed, followed by a brief description of the authors' method of English sentence analysis. Finally, reference is made to the system of machine translation. An example of Japanese sentence analysis is appended. (Author/FWB)