http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
"A directory of parent, associate and subsidiary companies."
Merged with: Who owns whom. Australasia and Far East; Who owns whom. Continental Europe; and, Who owns whom. North America to form: Who owns whom (High Wycombe, England)
Who owns whom. United Kindom & Republic of Ireland. Supplement