has_contributor A relation between an information content entity and an agent who made a contribution to its information content, or to its subsequent modification or assessment. SEPIO intentionally creates its own hierarchy of contributor properties, instead of re-using terms from existing standards like PAV or Dublin Core - whose domain is structured digital resources. This is because properties such as pav:createdBy specifically describe agents who generated a specific digital representation of information, while SEPIO aims to describe agents responsible for generating the abstract information content that such a concrete representation may express. The subject of 'contributor' relations in the SEPIO are explicitly abstract in nature - considered at the level of their information content as opposed to concretizations in particular digital resources or representations. For example, the SEPIO "stated_by" relation explicitly refers toan agent originally putting forth a statement as true (generating its information content), as opposed to an agent creating a specific digital representation of the statement (generating a particular concretized artifact such as a json object returned by an API). Should further clarification become available with respect to whether PAV or DC contributor properties accommodate the nuanced definitions we require, we will re-consider their inclusion in SEPIO. For example, the pav:authoredBy property seems to refer specifically to the agent who generated information content expressed in a resource - and thus may be appropriate in the context of SEPIO. But even here, the range of the property is a particular authored digital resource, and not the information content it expresses. DC properties such as dc:contributor and dc:creator are ambiguous as to which level of contribution they describe. contributes_to Agent