Owner: Publisher is/was the owner of  Publisher(More)

Indicates that one publisher owns another publisher

Renamed: Publisher was renamed to  Publisher(More)

Indicates that a publisher was renamed, and links the publishers under the old and new names

Split: Publisher was split to  Publisher(More)

Indicates the link between a publisher and (one of) its successor(s), where a publisher has been split

Split: Publisher was merged from  Publisher(More)

Indicates the link between a publisher and (one of) its predecessor(s), where several publishers have been merged.