Wikimedia

Generally speaking, "Wikimedia" is an umbrella term, which refers as much to "the collection of websites that includes Wikipedia, Wikisource, Wikidata, etc." as it does to the foundation, so it needs to be a distinct entity.

digraph { layout=dot rankdir=BT overlap=false concentrate=false bgcolor=lightblue // splines=" " "Wikimedia\nFoundation" -> Wikimedia Wikimedia -> { Wikipedia Wikidata Wikiversity "Wikimedia\nCommons" Wikibooks Wiktionary Wikisource } "Wikimedia\nFoundation" -> MediaWiki "Wikimedia\nFoundation" -> WikiBase MediaWiki -> Wikimedia MediaWiki -> WikiBase WikiBase -> Wikidata Wikidata ->{ Wikipedia Wikiversity "Wikimedia\nCommons" Wikibooks Wiktionary Wikisource } }

Wikipedia's Virtuous Circle

Another notable graph related to Wikimedia is the one (flawed) that emerged from Wikimedia's 2010 Strategic Planning process (which puts "technology" at the core), and the (in my view, corrected) version that puts "community" at the core. See this essay: What Wikimedia Needs in a Trustee (it was not titled with an eye to continual relevance, but the issues discussed there remain).

digraph { layout=neato overlap=false concentrate=false bgcolor=yellow // splines=" " Community [ color=red; pos = "2,2!"]; Reach [ pos = "0,0!" ]; Participation [ pos = "0,5!" ]; Quality [ pos = "2,2!" ]; "Tech\nPlatform" [ pos = "2,1!" ]; "Community" -> Reach "Community" -> Quality "Community" -> Participation Reach -> Participation Participation -> Quality Quality -> Reach "Tech\nPlatform" -> Community }