registered-by-incommon entity category is added to the metadata for every entity that has been registered through InCommon's Registration Authority (RA) processes. It allows for quick determination if a specific entity has met the requirements outlined in the InCommon Participation Agreement and the documents it references. Practically speaking, the
registered-by-incommon entity attribute can used by SP and IdP deployments to reverse the effects of importing eduGAIN entities (which may not adhere to the same participation requirements) into the InCommon production aggregate. See eduGAIN Considerations for InCommon Execs for more information regarding international interfederation.