W3C Government Linked Data Working Group F2F1, 30 June 2011

1. http://www.enakting.org/http://www.enakting.org/provenance/voidp/ Provenance Models for Linked Data Tope Omitola W3C GLD WG F2F1, 30 June 2011 1

2. Government Linked Data Explosion of Government Linked Data efforts and projects. data.gov, data.gov.au, data.gov.au Examples

4. Examples of Government Linked Data (csv)

5. Examples of Government Linked Data (rdf)

6. Provenance and Trust Whom do you trust on the Web?

7. Provenance and Trust Mash-ups, aggregation, integration, data re-use. How do you elicit Reliability and Accuracy? Generate trust by revealing as much information of you as possible. Enables consumers to decide the quality and trustworthiness of your data. Useful for Data Discovery/Mining + Query Planning.

8. Different kinds of Provenance When was x derived (when-provenance). How was x derived (how-provenance). What data was used to derive x (what-provenance). Who carried out the transformation(s) from whence x came (who-provenance).

9. Provenance Models for Linked Datasets Provenance Vocabulary Ontology

10. Provenance Models for Linked Datasets(contd) Open Provenance Model

11. Provenance Models for Linked Datasets(contd) Provenance for Datasets (voidp) http://www.enakting.org/provenance/voidp/

12. voiD Provenance Extension voidp Designed to be simple and lightweight. Mainly for (RDF) data publishers. Should include necessary information of the process, its inputs, and outputs. Basis is simple: An agent runs a process on a data (or dataset) to get another data (or dataset). Agent -> Process -> Data -> Data’ . @prefix voidp: <http://purl.org/void/provenance/ns> .

13. Voidp Classes and Predicates voidp:ProvenanceEvent:items under provenance control. voidp:actor: actor, person, group, software or physical artifact, involved in this provenance event. voidp:certification:used to contain dataset’ signature elements voidp:contact: contact details of whom to contact should people have queries about this dataset. voidp:item:the provenance characteristics of a data item under provenance control. voidp:processType: the type of transformation or conversion procedure carried out on the item’s source voidp:resultingDataset: dataset that is the result of this provenance event. voidp:sourceDataset: source dataset for the data item under provenance control.

14. A Concrete Example voidp:activity [ a voidp:Provenance; voidp:item [ foaf:name <http://crime.psi.enakting.org/stats/1898/2002/ds1>; rdf:typescovo:Dataset; rdfs:label "RECORDED CRIME STATISTICS 1898 - 2001/02"@en ; prv:createdBy [ rdf:typeprv:Actor ; prv:performedBy <http://tomitola> ; ]; voidp:originatingSource <http://rds.homeoffice.gov.uk/rds/pdfs07/recorded-crime-1898-2002.xls> ; voidp:hashValue "12335353535"^^xsd:string ; voidp:processType <http://void.rkbexplorer.com/id/dataset/123456789> ; to:hasBeginning "2010-10-24T21:32:52"^^xsd:dateTime ; to:hasEnd "2010-10-25T09:32:00"^^xsd:dateTime ; ]; voidp:item [ foaf:name <http://crime.psi.enakting.org/stats/1898/2002/ds1_1>; rdfs:label "Column for values of Homicide for 1898."@en; prv:createdBy [ rdf:typeprv:Actor ; prv:performedAt "2010-10-24T21:32:52"^^xsd:dateTime ; prv:performedBy <http://tomitola> ; ]; voidp:originatingSource <http://crime.psi.enakting.org/stats/1898/2002/ds1> ; voidp:processType <http://void.rkbexplorer.com/id/dataset/123456789> ; ];

15. Questions http://www.enakting.org/ http://www.enakting.org/provenance/voidp/