Representation Information Steve Rankin

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Information about Representation Information Steve Rankin

Published on November 7, 2008

Author: DigitalPreservationEurope



3rd Annual WePreserve Conference Nice 2008

Representation Information (RepInfo) Stephen Rankin (STFC,, Matt Dunckley (STFC), Brian Mcilwrath (STFC), Esther Conway (STFC), David Giaretta (STFC), CASPAR and DCC

Outline • OAIS Representation Information and Representation Information Networks • Organisation of Existing Representation Information • Structure and Semantics Example • RepInfo Network Example • CASPAR/DCC RepInfo Registry/Repository • CASPAR/DCC Tools for curating RepInfo • CASPAR/DCC RepInfo Tools Training Material

OAIS Representation Information and Representation Information Networks

Information Model & Representation Information Information Object The Information Model 1+ is key Data Object interpreted using 1+ Representation Information interpreted using Recursion ends at KNOWLEDGEBASE of the DESIGNATED COMMUNITY (this knowledge will change over time and region) Physical Digital Object Object 1+ Bit Sequence

Organisation of Existing Representation Information • RepInfo can be any type of object, a PDF document, software, text, xml etc. • In its basic form it is just the existing information about the data. • So curating RepInfo can be viewed as classifying and organising existing information about data. • RepInfo is the only thing that can allow data to be reused. • RepInfo some can be shared and reused.

RepInfo for a Hot Cup of Tea

RepInfo for a Hot Cup of Tea

UNESCO Villa Livia Data

Villa Livia Data • 3D point clouds (formats: imp, dxf, dwg) • Elevation grids (agr, bt) • 3D meshes (mdl, vrml, v3d) • Textured 3D models (max, pmr, ive, osg) • Satellite data (ers, ecw) • GPS data, maps (txt, apm, shp) • Digital images (targa, jpeg, tiff, png, psd, bmp, gif, dds) Total data size approximately 500 GB

UNESCO Villa Livia Data

RepInfo Network Example

CASPAR/DCC RepInfo Registry/Repository • Allows you to stores and retrieve RepInfo and RepInfo Networks. • Facilitates the sharing and reuse of Repinfo – unique identifiers for RepInfo (CPIDs). • Has an API (software interfaces) to allow you to communicate with it. • Currently implemented with OASIS ebXML Registry software (FreebXML) and JAXR API. • API could be implemented with any registry software. • Web Interface at • Registry software and API available in the CASPAR SVN Code Repository:

Registry API CASPAR Registry API •SOAP CASPAR Non- •JAVA CASPAR Registry Implementation Registries E.g. PRONOM, API allows applications GDFR •JAXR to talk to many different implementations

CASPAR/DCC Tools for curating RepInfo • Java GUI Tool for adding or retrieving RepInfo and RepInfo networks to/from the RepInfo Registry. • It also allows you to visualise RepInfo Networks that exist within the Registry. • Links to applications that allow you to view the RepInfo. • Allows you to retrieve the unique identifier (CPID) for the RepInfo.

RepInfo GUI Tool Registry visualisation, searching and display of contents using GUI tool(s)

CASPAR/DCC RepInfo Tools Training Material • Video tutorials of using the RepInfo GUI tool • Documentation tutorial for using the RepInfo GUI tool. • Brain Training Game for RepInfo • Video tutorial of using RepInfo creation tools (creating structure and semantics). • Packaging tutorial. • More under construction – Programming guides etc. • All very much under development but a preview for the material is available at: • Or we can come to you or you can come to us for a tutorial on our tools. You just need to ask!

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