1. Towards an Infrastructure for the Synchronisation of Library Metadata Christoph Böhme | 14 | Metadata Synchronisation| 28 November 2012 1

2. Key Issues –Linked data needs synchronisation | 14 | Metadata Synchronisation| 28 November 2012 2 –This synchronisation has specific requirements –These problems have been solved already –Our vision for a synchronisation infrastructure

3. | 14 | Metadata Synchronisation| 28 November 2012 3 -Add (more) links to a data set -Create richer search indexes -Comprehensive presentation Use Cases Linked Data Today

4. | 14 | Metadata Synchronisation| 28 November 2012 4 Application Linked Data Applications

5. | 14 | Metadata Synchronisation| 28 November 2012 5 Application -Quality checks -Data normalisation -Availability of external data sets -Dependency on external infrastructure External Data Sets: Challenges

6. Application | 14 | Metadata Synchronisation| 28 November 2012 6 new changed deleted An Easy Solution?

7. | 14 | Metadata Synchronisation| 28 November 2012 7 -Small, infrequent interactive changes -Automated changes covering huge parts of a data set Patterns of Change

8. 8 | 14 | Metadata Synchronisation| 28 November 2012 Application new changed deleted -Expensive Operation -Requires data dumps -Updates may be required frequently -Local additions to the data are lost An Easy Solution 2?

9. | 14 | Metadata Synchronisation| 28 November 2012 9 Application -Two data sets combined may constitute new knowledge -Can be useful for the original source -Bidirectional connection between the data sets Local Additions

10. | 14 | Metadata Synchronisation| 28 November 2012 10 Application new changed deleted -Copies of external data sets are needed (“caches”) -Fast and reliable ways for creating such copies -Methods for keeping these copies synchronised new deleted changed Requirements

11. | 14 | Metadata Synchronisation| 28 November 2012 -Receiver controls time of synchronisation -Low load on sender side -Not all changes may be relevant 11 Requirements of Synchronisation

12. -Receiver controls time of synchronisation -Low load on sender side -Not all changes may be relevant | 13 | Metadata Synchronisation| 28 November 2012 12 These problems have been solved already! Requirements of Synchronisation

13. | 14 | Metadata Synchronisation| 28 November 2012 13 Sync-API Client-API Sync-API Our Vision

14. Thank You Any questions? | 14 | Metadata Synchronisation| 28 November 2012 14