Digital Curation Centre. The DCC's Digital Curation Reference Manual is designed to help data custodians, producers and users better understand the challenges they face and the roles that they play in creating, managing and preserving digital information over time. For each topic covered, suggestions for best practice and real life examples are given. The DCC are delighted to announce the release of the following new instalment. includes: Appraisal and Selection, Archival Metadata, Archiving Web Resources, Curating E-mails, File Formats, Investment in an Intangible Asset, Learning Object Metadata, Metadata, Microfilm for digital preservation - new!, Ontologies, Open Source for Digital Curation, Preservation Metadata, Preservation Strategies.