@misc{60331, author = {William MacGregor}, title = {An Ontology of Identity Credentials Part 1: Background and Formulation}, year = {2006}, month = {2006-10-06}, publisher = {Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD}, url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=906227}, language = {en}, }