Hi,
Classification high up in the ontology should not be allowed. This entry has been classified as a role which we should basically disallow:
http://www.ebi.ac.uk/chebi/searchId.do?viewTermLineage=true&chebiId=CHEBI:53431#termLineage
Only anything below chemical, biological and application should be allowed.
Cheers,
P
possibly the same validation should be applied to the curation-tool?