Kathryn Cassidy discusses the types of metadata needed for digital preservation. Rich descriptive metadata is needed such as contextual information about data collection methods, questionnaires, and consent forms. Rights and reuse metadata like licenses and copyright information is also important. Administrative and technical metadata including file characterizations, checksums, and locations of copies ensures understandability and reusability over time. The Digital Repository of Ireland requires description, rights, type, contributor, and date metadata as well as additional technical and administrative fields to effectively preserve and provide access to digital materials in the long-term.