Key points are not available for this paper at this time.
The authors of this paper were formerly involved in designing computer‐assisted services for physicists, particularly with respect to the improvements to facilities offered by Physics Abstracts . This study arose from discussions concerned with defining what the literature of physics is. This is an extremely difficult task, but one which has to be faced by those providing a service which aims to give an acceptable coverage of the relevant literature.
East et al. (Tue,) studied this question.