Provenance Information in the Web of Data

Provenance Information in the Web of Data Olaf Hartig Humboldt-Universität zu Berlin http://olafhartig.de/foaf.rdf#olaf

Provenance of a data item: information about the history ● Olaf Hartig - Provenance Information in the Web of Data 2

Outline Towards a model of Web data provenance Provenance information in the Web of data today Upcoming tasks Olaf Hartig - Provenance Information in the Web of Data 5

Existing Provenance Research Main research areas: (scientific) workflows, DBMSs ● General focus: ● data creation Olaf Hartig - Provenance Information in the Web of Data 6

Olaf Hartig - Provenance Information in the Web of Data 7

Web data provenance comprises two dimensions: Data Creation • Data Access Olaf Hartig - Provenance Information in the Web of Data 11

Basics of the Provenance Model Provenance graph describes provenance of a data item ● Nodes: provenance elements – pieces of provenance info ● Edges: relate provenance elements to each other ● Subgraphs for related data items possible ● Olaf Hartig - Provenance Information in the Web of Data 12

Basics of the Provenance Model Provenance model defines: ● Types of provenance elements ● Relationships ● Olaf Hartig - Provenance Information in the Web of Data 13

Basics of the Provenance Model Provenance model defines: ● Types of provenance elements ● Relationships ● High level of abstraction (only main element types) ● Olaf Hartig - Provenance Information in the Web of Data 14

Basics of the Provenance Model General differentiation: ● Actors Executions Artifacts Olaf Hartig - Provenance Information in the Web of Data 15

Data Access Dimension Data Item Data Accessor (Non-Human) contains Information Resource Access Time Data Access Data Providing Service (Non-Human) controls uses Service Provider Data Publisher (Human) Relation to the provided Information Resource Olaf Hartig - Provenance Information in the Web of Data 16

Data Access Dimension cont. owns Public Key Signer Relation to the signed Data Integrity Assurance Digital Signature signs Verification Result (Signed) Artifact Olaf Hartig - Provenance Information in the Web of Data 17

Data Creation Dimension Provenance Information Source Data Provenance Creation Time Information Creation Guidelines Data Creator Data Creation (Human or Non-human) {complete,disjoint} Data Creating Device (e.g. Sensor) Data Item Data Creating Service (e.g. Software Agent) part of Provenance responsible for responsible for Data Creating Entity Information (e.g. Person, Group, Orga.) (Encompassing) Data Item Relation to Olaf Hartig created Data the - Provenance Information in the Web of Data 18

Provenance information in the Web of data today Olaf Hartig - Provenance Information in the Web of Data 19

Provenance-related Vocabularies DC – Dublin Core Metadata Terms FOAF – Friend of a Friend SIOC – Semantically-Interlinked Online Communities SWP – Semantic Web Publishing vocabulary ● WOT – Web of Trust schema ● OMV – Ontology Metadata Vocabulary ● PML – Proof Markup Language ● Changeset vocabulary ● Ouzo Provenance Ontology ● Olaf Hartig - Provenance Information in the Web of Data 20

Provenance-related Vocabularies DC – Dublin Core Metadata Terms Olaf Hartig - Provenance Information in the Web of Data 21

Provenance-related Vocabularies DC – Dublin Core Metadata Terms dc:creator ● dc:contributor ● dc:source ● dc:created ● dc:modified ● dc:publisher ● dc:provenance ● Olaf Hartig - Provenance Information in the Web of Data 22

Provenance-related Vocabularies DC – Dublin Core Metadata Terms dc:creator ● dc:contributor ● dc:source ● dc:created ● dc:modified ● dc:publisher – “an entity responsible for making the ● resource available” dc:provenance ● Olaf Hartig - Provenance Information in the Web of Data 23

Provenance-related Vocabularies DC – Dublin Core Metadata Terms dc:creator ● Data Access dc:contributor ● Data Providing Service dc:source ● (Non-Human) controls uses dc:created Publisher Service Provider ● Data (Human) dc:modified ● dc:publisher – “an entity responsible for making the ● resource available” dc:provenance ● Olaf Hartig - Provenance Information in the Web of Data 24

Main Issues Today Vocabularies: ● Partly unsuitable ● Lack of certain features ● Coverage of provenance model impossible ● Olaf Hartig - Provenance Information in the Web of Data 25

Provenance-related Vocabularies DC – Dublin Core Metadata Terms Property Occurrences* dc:creator about 24,284 dc:contributor 476 dc:source about 3,631 dc:created about 82,720 dc:modified about 12,020 dc:provenance 7 *Measured by querying Sindice; Feb. 7, 2009 (by that time Sindice indexed about 48,99 million documents) Olaf Hartig - Provenance Information in the Web of Data 26

Main Issues Today Vocabularies: ● Partly unsuitable ● Lack of certain features ● Coverage of provenance model impossible ● General lack of provenance-related metadata ● on the Web of data Olaf Hartig - Provenance Information in the Web of Data 27

Possible Reasons Lack of suitable vocabularies ● Lack of usable tools ● Ignorance / lack of sensitization ● Olaf Hartig - Provenance Information in the Web of Data 28

Upcoming tasks Olaf Hartig - Provenance Information in the Web of Data 29

Address the Issues Let's develop a vocabulary for Web data provenance ● Proposal: refine the presented provenance model ● Integrate existing vocabularies for specific types of ● provenance elements Olaf Hartig - Provenance Information in the Web of Data 30

Address the Issues Let's develop a vocabulary for Web data provenance ● Proposal: refine the presented provenance model ● Integrate existing vocabularies for specific types of ● provenance elements Let's develop usable tools for data providers ● Edit and publish provenance-related metadata ● Automatic generation if possible ● Olaf Hartig - Provenance Information in the Web of Data 31

Address the Issues Let's develop a vocabulary for Web data provenance ● Proposal: refine the presented provenance model ● Integrate existing vocabularies for specific types of ● provenance elements Let's develop usable tools for data providers ● Edit and publish provenance-related metadata ● Automatic generation if possible ● Let's raise awareness of data providers ● Probably the hardest task ● Maybe voiD can help ● Olaf Hartig - Provenance Information in the Web of Data 32

Thank you! Olaf Hartig Humboldt-Universität zu Berlin http://olafhartig.de/foaf.rdf#olaf

These slides have been created by Olaf Hartig http://olafhartig.de This work is licensed under a Creative Commons Attribution-Share Alike 3.0 License (http://creativecommons.org/licenses/by-sa/3.0/) Attribution: http://www.flickr.com/photos/adrenalin/3032734/ ● http://www.hasslefreeclipart.com ● http://www.flickr.com/photos/dullhunk/428079229/ ● http://www.flickr.com/photos/darwinbell/1337963794/ ● http://www.flickr.com/photos/alandd/2780700767/ ● http://www.flickr.com/photos/simeon_barkas/2872099696/ ● http://www.flickr.com/photos/robinh00d/122544491/ ● http://www.flickr.com/photos/adrenalin/3032747/ ● Olaf Hartig - Provenance Information in the Web of Data 34

Provenance Information in the Web of Data

by Olaf Hartig on Apr 20, 2009

Accessibility

Categories

Tags

Upload Details

Usage Rights

1 Embed 17

Statistics

Provenance Information in the Web of Data — Presentation Transcript