The document discusses the principles and technologies behind Linked Open Data, emphasizing the need to move away from closed data silos towards a more accessible web of structured data. Key components include the use of URIs for resource identification, the Resource Description Framework (RDF) for representing metadata, and SPARQL for querying data. The document highlights DBpedia as a model for extracting and structuring information from Wikipedia to promote interconnected data on the web.

1. LOD-LAM Jenel Farrell - SAA 2011 Metadata Object Roundtable

2. LINKED OPEN DATA DATA DATA

3. LIBRARIES ARCHIVES MUSEUMS MUSEUMS MUSEUMS

4. The current web is a web of documents intended for h uman interpretation

5. Data is locked in closed silos

6. The linked data vision is to...

7. Move away from the repository-centric mind-set and open data silos Publish data applications computers can access & interpret Use “standards” in the form of common Web technologies

8. Making it possible for applications to look up (meta)data ...

9. ...about things books concepts people places by looking up their names http://dbpedia.org/resource/The_Metamorphosis on the web web web web web

10. But, to allow applications to look up metadata in your database, we need some technology

11. Uniform Resource Identifier (URI) URI is a string of characters used to identify (UI) a name or resource on the internet URIs are more specific than URLs, which name the location of something. URIs are the ‘thing’

12. Resource Description Framework (RDF) In addition to having a unique identifier for your ‘thing’, you need RDF, which is a model for representing metadata on the web This representation comes in the form of statements, which are called ‘triples’ Triples define the relationships between things Language for describing vocabularies (there are others) Way to represent info on the web

13. Simple Knowledge Organization System (SKOS) A language (built on RDF) for describing controlled vocabularies thesauri classification schemes taxonomies subject-heading systems

14. SPARQL And, of course, a language to query the data SPARQL is a query language built on RDF

15. DBPedia... The main objective of DBpedia is to extract structured information from Wikipedia, convert it into RDF, and make it freely available on the Web. In a nutshell, DBpedia is the Semantic Web mirror of Wikipedia.

16. In a nutshell, the basics of LINKED OPEN DATA LINKED OPEN DATA LINKED OPEN DATA

17. Make your stuff available on the web (whatever format) under an open license

18. Make your data available as structured data (ex. CSV table instead of an image scan of a table)

19. Use non-proprietary formats (CSV instead of Excel)

20. Use URIs to identify things , so that people can point at your stuff

21. Link your data to other data to provide context

22. Linked data is essential to connect the semantic web

23. By linking up data, we gain access to many more databases & discover new connections