Basic reporting

No Comments

Experimental design

The ontology described in this paper is sorely needed by the research community, and based on the examples provided in the supplemental materials, it is sufficiently expressive to do what it is intended to do. Of course, the real trick is getting the community to adopt something like this. Adoption will depend on software implementations that hopefully will come next.

Validity of the findings

Again, well done; the ontology is available from a public web site and while I am not an ontology expert, the content of GVFO certainly "makes sense" to me.

Comments for the author

This is a really well written paper; it is rare for me to review a paper that doesn't have at least something missing or poorly written sections.