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FOCUS – A Scalable and Extensible Digital Format Registry

FOCUS – A Scalable and Extensible Digital Format Registry. Principal Investigator: Joseph JaJa Graduate Students: Sang Song and Muluwork Geremew Lead Programmers: Mike Smorul and Mike McGann Institute for Advanced Computer Studies University of Maryland, College Park. Format Obsolescence.

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FOCUS – A Scalable and Extensible Digital Format Registry

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  1. FOCUS – A Scalable and Extensible Digital Format Registry Principal Investigator: Joseph JaJa Graduate Students: Sang Song and Muluwork Geremew Lead Programmers: Mike Smorul and Mike McGann Institute for Advanced Computer Studies University of Maryland, College Park

  2. Format Obsolescence • Handling of digital formats is an essential part of long-term preservation • Preservation of any object must include ways to render and transform the object if necessary. • Needs to preserve • Different essential aspects of objects. • Tools for capturing the essential format characteristics of information stored as digital objects.

  3. FOCUS: FOrmat CUration Service • Maintains persistent information on digital formats and applications to access and manipulate them. • Accessible either • Directly through LDAP • Or indirectly through SOAP (Web Services) Web Service Agent Format Registry SOAP LDAP

  4. FOCUS on LDAP/SOAP • Interoperability • LDAP and SOAP provide the standard models and protocols, being platform independent. • Scalability • LDAP is a proven scalable technology. • LDAP schema can be extended and server can be replicated with ease. • SOAP server side can be extended without affecting client sides. • Security • SOAP can be on top of SSL (https). • LDAP also provides its own secure authentication and authorization methods.

  5. FOCUS Data Model • General descriptive properties. • Processing : format taken as input and/or output. • General descriptive properties. • Processing: rendering, editing, conversion and validation services/systems.

  6. FOCUS Service Model Web Service Agent Format Registry Locates transformation services to convert DO from source format to format of interest. Conversion Service Identification Service Identifies format of a specific DO using the internal signature Validation Service Determines a verification service to verify the format of a specific DO Identifies current rendering conditions for specific digital format. Rendering Service

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