Change of Basic Subjects in DC Edition 17

Out of the 746 reallocations of subjects made in DC Ed 17 (1965), 140 reallocations involve change in Basic Subject. These changes are of the following four kinds: (l) Change of Basic Subjects with new Basic Subject being same as in CC; (2) Change of Basic Subjects originally same as in CC, to some other Basic Subjects; (3) Change of Basic Subjects which are not in conformity with CC, either in DC Ed 16 or in DC Ed 17; and (4) Compound Subjects usually occurring in articles in periodicals. Out of the changes made in DC Ed 16 (1958) and DC Ed 17 (1965), 153 Compound Subjects have the Basic Subjects same As in Cc. Some of the inapproprite assignments of Basic Subjects are perhaps due to the absence of explicitly stated guiding principles in DC.