The document discusses digital preservation and file format selection for long-term preservation of digital assets. It notes that file formats can become obsolete over time and presents five criteria for selecting preservation-suitable formats: 1) widespread adoption, 2) lack of technological dependencies, 3) disclosure of specifications, 4) transparency/identifiability, and 5) ability to embed metadata. It also discusses using a "performance model" where the significant properties and essence of a digital object are maintained regardless of file format changes over time. The key recommendation is to select file formats that align with a preservation strategy articulating the repository's purpose and community needs.