  The construction of an ontology of scientific knowledge objects, presented
here, is part of the development of an approach oriented towards the
visualization of scientific knowledge. It is motivated by the fact that the
concepts that are used to organize scientific knowledge (theorem, law,
experience, proof, etc.) appear in existing ontologies but that none of these
ontologies is centered on this topic and presents them in a simple and easily
understandable organization. This ontology has been constructed by 1) selecting
concepts that appear in high level ontologies or in ontologies of knowledge
objects of specific fields and 2) by interviewing scientists in different
fields. We have aligned this ontology with some of the sources used, which has
allowed us to verify its consistency with respect to them. The validation of
the ontology consists in using it to formalize knowledge from various sources,
which we have begun to do in the field of physics.
