[http://neurocommons.org/page/Information_Artifact_Ontology IAO webpage]

The Information Artifact Ontology (IAO) is an ontology of information entities. It was originally created as a response to the need, identified by the OBI (Ontology for Biomedical Investigations) Consortium, for a controlled vocabulary for describing publications, protocols, databases, measurement results, and other information artifacts of importance to experimental science. Since then portions of IAO have been employed in a large number of ontologies, in scientific and other domains, some of which are listed below. One important role of IAO is to supply a set of standard metadata types (OWL annotation properties such as ‘definition’, ‘synonym’) for OBO Foundry ontologies. IAO is relied on also in the standard OBO to OWL translation used by the OBO Foundry. 

'''A list of ontologies extending IAO'''

*[http://purl.obolibrary.org/obo/aero Adverse Event Reporting Ontology (AERO)]
*[https://code.google.com/p/obi-webservice/ Bioinformatics Web Service Ontology (OBIWS)] 
*[https://code.google.com/p/bco/ Biological Collections Ontology]
*[http://www.ontobee.org/browser/index.php?o=CHMO Chemical Methods Ontology (CHMO)]
*[http://www.cogpo.org/ Cognitive Paradigm Ontology (COGPO)]
*[http://bioportal.bioontology.org/ontologies/CDAO Comparative Data Analysis Ontology (CDAO)]  
*[http://www.incf.org/programs/modeling/cno Computational Neuroscience Ontology (CNO)]     
*[https://code.google.com/p/c2po/ Core Clinical Protocol Ontology (C2PO)] 
*[http://mba.eci.ufmg.br/downloads/TowardsOntology.pdf Document Act Ontology]
*Document Control Ontology
*[https://code.google.com/p/eagle-i/ Eagle-I Research Resource Ontology (ERO)] 
*[http://ncor.buffalo.edu/2013/STIDS/5-Email.pptx  The Email Ontology] 
*[https://code.google.com/p/emotion-ontology/ Emotion Ontology (MFOEM)]     
*[http://www.ebi.ac.uk/efo/ Experimental Factor Ontology (EFO)]  
*[https://lirias.kuleuven.be/bitstream/123456789/273222/1/sokd10.pdf Exposé Ontology]
*[http://ncorwiki.buffalo.edu/index.php/STIDS_2013_Paper IAO-Intel]
*[http://infectiousdiseaseontology.org/page/Main_Page Infectious Disease Ontology (IDO)] 
*[http://www.fludb.org/brc/home.do Influenza Research Database (IRD)]    
*[http://milportal.ncor.buffalo.edu/ontologies/1018 Information Entity Ontology]
*[https://code.google.com/p/mental-functioning-ontology/ Mental Functioning Ontology (MF)]     
*[http://nemo.nic.uoregon.edu/ Neural ElectroMagnetic Ontologies (NEMO)] 
*[http://www.ontocat.org/ OntoCAT] 
*[https://code.google.com/p/obcs/ Ontology of Biological and Clinical Statistics]
*[http://obi-ontology.org/page/Main_Page Ontology for Biomedical Investigations]   
*[http://purl.org/ddi/home Ontology for Drug Discovery Investigations (DDI)] 
*[https://code.google.com/p/ogms/ Ontology for General Medical Science (OGMS)] 
*[https://code.google.com/p/onstr/ Ontology for Newborn Screening Follow-up and Translational Research (ONSTR)]  
*[https://code.google.com/p/ontology-of-clinical-research/ Ontology of Clinical Research (OCRE)]     
*[http://www.ontodm.com/doku.php Ontology of Data Mining (OntoDM)] 
*[http://www.ontodm.com/doku.php?id=ontodt Ontology of General Purpose Datatypes (ONTODT)]
*[http://code.google.com/p/omrse/ Ontology of Medically Related Social Entities (OMRSE)]  
*[http://www.violinet.org/ovae/ Ontology of Vaccine Adverse Events (OVAE)]
*[http://code.google.com/p/ohd-ontology Oral Health and Disease Ontology (OHDO)]
*[https://code.google.com/p/popcomm-ontology/ Population and Community Ontology (PCO)]
*[http://code.google.com/p/proper-name-ontology Proper Name Ontology]
*[https://code.google.com/p/semanticscience/wiki/SIO Semanticscience Integrated Ontology (SIO)] 
*[http://theswo.sourceforge.net/ Software Ontology (SWO)] 
*[https://code.google.com/p/translationalmedicineontology/ Translational Medicine Ontology (TMO)] 
*[http://ncor.buffalo.edu/2013/IE500/Presentations1/Twitter-Ontology.pptx  Twitter Ontology] 
*[http://www.violinet.org/vaccineontology/  Vaccine Ontology (VO)]