C-NOMIS will contain data on offender demographics (including nationality, ethnicity, education, employment, disability, addresses, and other relevant personal data), their court proceedings, offences, sentences, licences, risks, interventions on which they are placed, their attendances, performance and progress on their sentences including enforcement and breach of community sentences and licences. Data will also be held on prisoner movements, incidents, adjudications, cell locations, activities and finances (including prisoner earnings). C-NOMIS will also contain data on visitors to prisoners to enable the management of visits and visiting orders.
C-NOMIS is classified as a "restricted" system under the Government Protective Marking Scheme, and the data held within it will not exceed this classification. Access is on a "need to know" basis, while also facilitating the effective sharing of information in support of end-to-end offender management.