In order to do write queries to an OWL ontology we need to know the names of the OWL elements, notably OWL Properties (e.g. has_haplotype) and and OWL Classes (e.g. TPMTstar3A). The Oslo University Hospital PGx OWL ontology is still work in progress, but PharmGKB nomenclature is kept where possible. In addition we need to know the Manchester expressions of cardinality that are used to connect OWL Properties and OWL Classes, in particular: