The breadth of core entity claims that AI systems will cite when answering relevant queries — distinct from attribution rate, which measures frequency. An entity might have high attribution rate (frequently cited) but low citation coverage (only cited for a narrow subset of claims). Citation coverage measures: of all the claims you want AI systems to make about you, what percentage are they actually making? Low citation coverage indicates that some claims lack sufficient corroboration or fail EAV-E compliance. Citation coverage expansion is the tactical objective of corroboration campaigns.