dm2e project meeting bergen: wp2 presentation, kai eckert (university of mannheim)

co-funded by the European Union

Work Package 2

All WP Meeting12th June 2014, Bergen

Kai Eckert

Timetable

16.04.2013 DM2E Review: Work Package 2 2

Q8 •Final Version of the Interoperability Infrastructure•Integration of OmNom, MINT, Silk

Q9 •Review II•DM2E Model 1.1•Data Ingestions, Contextualisation

Q10 •DM2E Model 1.2, RDF Validation, Application Profiles•Europeana Ingestion•Contextualisation

Old next steps (Athens)

• Final Version (January 2014)– Complete transformation and ingestion infrastructure– Integrated contextualization– Connection with scholarly environment (WP3)– Documentation Drafts

• Data ingestions(!)• Maintenance phase

– Bug fixing and performance tuning in OmNom– Documentation and introductory materials with WP4– Data provision for Europeana– Search and browse interface

DM2E Review: Work Package 2 316.04.2013

Data Model

DM2E All WP Meeting: Work Package 2 411.06.2013

Iterative Process (Ingestion Model)

1. Issues are tracked based on validation and test reports.

2. Changes to the model are collected and included in the current draft version of the model.

3. Providers adjust their mappings.

13.03.2014 DM2E Review: Work Package 2 5

Automatic validation

IngestionTests

Mapping creation

T 2.1

4. A new draft is published on a regular basis for additional feedback.

5. Based on the feedback, a new version of the model is released.

DM2E Model

• Reviewer recommendation: Stop changing the model• Open issues mentioned in Review:

– EAD requirements– Evaluation– Error fixing

• Current state: Finalisation of the last model version 1.2– Final release in July 2014

• Model specification– Now working on Revision 1.2_RC1– Check: DM2E model compared to EDM Mapping Guidelines v2.1 (May

2014)• Removed edm:isDerivativeOf from edm:WebResource• Removed edm:wasPresentAt from edm:WebResource

– Corrected CIDOC CRM namespace– Added section “Technical Details”

Evaluation

• The model evaluation took place in April/May 2014• Base:

– 10 datasets– Delivered by eight data providers– Mapped by six different institutions– Altogether 61,365,146 triples


Evaluation: Some Insights

• Many classes and properties are not mapped– For example: edm:Event, dm2e:misattributed, edm:happenedAt, skos:hiddenLabel

• Some of these were asked for by providers!

– Conclusion: Unused classes and properties can be removed to achieve a higher simplicity of the model

• Different providers have different mapping styles– Conclusion: Mapping recommendations are important!

• Evaluation advantages– Helpful to discover mapping errors that were not detected

by the validator (e.g. no usage of rdf:type)

Evaluation: Property Usage

• A few properties were used very often• Most properties were rarely used (Long tail phenomenon)• About a third of all properties were never used

Das DM2E-Modell: ein Anwendungsprofil des EDM 915.04.2014

Evaluation: CHO Types

Dataset bibo:Series

bibo:Book

dm2e:Manu-script

dm2e:Para-graph

bibo:Journal

bibo:Issue

fabio:Article

bibo:Letter

dm2e:Page

Dataset 1 - - 24 - - - - - 10,427

Dataset 2 1,251 10 530,314

Dataset 3 4,552 39,873 - - - - - - -

Dataset 4 - - 175 - - - - - 46,006

Dataset 5 - - 1,012 - - - - - 307,202

Dataset 6 - 2,916 - - - - - - 472,994

Dataset 7 - 1,295 - - - - - - 416,172

Dataset 8 - - - - - - - 3,630 34,596

Dataset 9 - - - - 1 346 42,173 - 159,277

Dataset 10 - - 20 9,635 - - - - -

Total 4,552 45,335 1,241 9,635 1 346 42,173 3,630 1,976,988


Evaluation: Number of statements

• Average number of statements per dataset


Consequences

• Goal: Remove unnecessary elements from the model• All unused classes and properties are marked in orange

in the current draft revision• Please provide feedback to UBER whether they can be

removed from the model description• Feedback until 22th of June 2014


https://doc.dm2e.hu-berlin.de/redmine/attachments/550/DM2E_Model_V1.2_Specification_DRAFT.docx


Konstantin Baierer, Evelyn Dröge, Vivien Petras, Violeta Trkulja:

Linked Data Mapping Cultures: An Evaluation of Metadata Usage and Distribution in a Linked Data Environment

Submitted to Dublin Core Conference 2014

Infrastructure


UI Integration


T 2.5

MINT

Silk

OmNom

Access to the data

Search and browse the data


View and accessthe data


Kai Eckert, Dominique Ritze, Konstantin Baierer, Christian Bizer:

RESTful Open Workflows for Data Provenance and Reuse

Poster at WWW Conference, 2014

ContextualisationRDF ValidationEuropeana Ingestion


See dedicated presentations.

Outreach and Sustainability

• DCMI RDF-Application Profiles– Establishing RDF Application Profiles– DM2E: UBER, UMA, ONB– External: W3C, Europeana, DNB, …

• JudaicaLink– Provide web encyclopediae as Linked Data for contextualisation resources– DM2E: UMA, EAJC– Encyclopediae: RUJEN, YIVO, …

• MarineLives– Transcription of depositions from High Court of Admiralty, 17th century.– DM2E: UMA, NET7– External: MarineLives, University Bath Spa, …

• COST Action Linked Open Data across the Humanities– Proposal for trans-domain action to advance collaboration– DM2E: UMA, …– External: University of Oxford, Università del Piemonte Orientale, UNED, …



Dominique Ritze, Caecilia Zirn, Colin Greenstreet, Kai Eckert, Simone Paolo Ponzetto: Named Entities in Court: The Marine Lives Corpus, Paper at LRT4HDA Workshop at LREC 2014

Thomas Bosch, Kai Eckert: Towards Description Set Profiles for RDF using SPARQL as Intermediate Language, Submitted to Dublin Core Conference 2014

Thomas Bosch, Kai Eckert: Requirements on RDF Constraint Formulation and Validation, Submitted to International Semantic Web Conference 2014

Thank you.


dm2e project meeting bergen: wp2 presentation, kai eckert (university of mannheim)

Technology