The first of the above tasks, data modelling, was a central topic
of the conference. There were few ideas discussed that we had
not already encountered in our survey of data models in the
literature, but this fact simply reinforces the belief that
researchers in the three areas are concerned with much the
same problems.
There was surprising commonality in the data models underlying
the various representation languages, in all three areas. Some
publication and its date appear, and notice is given that copying is by
permission of the Association for Computing Machinery. To copy
otherwise, or to republish, requires a fee and/or specific permission.