norm spec is short for "normative specification." By normative, we mean as contrasted with positive, or perhaps empirical.
One example of a normspec is the maxhi schema.
It is hoped that pub wan will eventually have the capability to store normspecs as database objects. These would be user-submitted. Whether they are included in the public database or are fully publicly queryable should be the contributor's perogative. This is for obvious privacy reasons. There is of course no good reason to limit normspecs to one per pubwan participant, since each normspec represents, not an individual's norms, but their application to a single decision support query. The main goal of pubwan, of course, is transparency, not privacy. But privacy must be respected if people are to volunteer information.