The development of the NCHEM taxonomy came about because of a need for standardized and comprehensive structures for cataloging and organizing information on the multitude of instructional programs and activities presently functioning in the various levels and sectors of education. Although considerable effort has gone into the development of the…

Continuing technological advances in computers and communications make possible the integration of data systems and the exchange of data among them on an expanding scale. However, the full effect of these advances cannot be realized unless the need for uniform understanding of the common information (data elements) and their expression in data…