Work Package 2 of the DM2E project focused on developing the DM2E data model and infrastructure over seven quarters from 2013 to early 2014. Key activities included testing external components, developing the initial DM2E data model, prototyping the infrastructure and workflows, refining the data model, implementing the model in MINT, developing intermediate and final versions of the infrastructure, and preparing for data ingestions and evaluations. The work package aimed to have the first stable version of the data model and a final operational version of the infrastructure completed by the end of 2013 and early 2014.

1. Work Package 2
All WP Meeting
28th November 2013, Athens
Kai Eckert
co-funded by the European Union

2. Timetable
Q1
• 2.1, 2.3: Test of external components (MINT, Silk, jMet2Ont, D2R), Data Survey
• 2.2: Basic entity structure of the model
Q2
• 2.1, 2.4, 2.5: Prototype of Infrastructure, Workflows, UI
• 2.2: Mapping workshops, further work on the DM2E data model
Q3
• Softwaredesign of Intermediate Architecture, Foundational work
• Combination of the DM2E model with Linked Data principles, Integration with Architecture
Q4
• Provenance Model for DM2E Infrastructure, Web service development
• DM2E Data Model 1.0, first stable and operational version.
Q5
• Implementation of the DM2E Data Model in Mint.
• Development of the Intermediate Version of the Infrastructure: due on July 15th.
Q6
• Implementation of OmNom as final version.
• Further refinements of the DM2E model.
Q7
• Setup of the Silk instance, finalization of OmNom (final version due January 2014).
• Data ingestions (Wittgenstein, ÖNB Codices), data evaluation for contextualisation.
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DM2E Review: Work Package 2
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3. Data Model (Evelyn, Julia, Steffen)
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4. DM2E Model Refinements
• Currently working on Version 1.1:
– dm2e:
<http://onto.dm2e.eu/schemas/dm2e/1.1/> .
– dm2edata: <http://data.dm2e.eu/data/> .
• Model specification
– Revision 0.8
– Updated EDM definitions
• New property
– dm2e:hasAnnotatableVersionAt
• Hierarchies now analogue to EDM
– dcterms:hasPart and dcterms:isPartOf

5. DM2E Model Documentation
Current stable Version: DM2E Model v1.0
• Version 1.0 documentation on dm2e.eu: http://
dm2e.eu/document#DM2EModelSpecification
• Version 1.1 revision history and latest releases on
Redmine
– Revision history
– Model specification
– OWL file

6. Modelling Issue: Uncertainty
• Thoughts on modelling uncertainty:
– https://dm2e.hu-berlin.de/redmine/projects/wp2/ wiki
/DM2E#Uncertainty-in-ontology-modelling
Provider
Representation in DM2E
• Example of the
simple solution:
data
1909-[19--?] edm:TimeSpan
begin:
1909
end:
uncertainBegin:
uncertainEnd: 1999
[18--?]
edm:TimeSpan
begin:
end:
uncertainBegin: 1800
uncertainEnd:
1899
17XX
edm:TimeSpan
begin:
end:
uncertainBegin: 1700
uncertainEnd:
1799

7. Mappings
Mappings of the Polytechnische Journal

8. Consistency Check of the Ontology
• First test using Protege (4.3.0)
– Reasoner (HermiT 1.3.8, FaCT ++)
– discovered some inconsistent inferred axioms
– changed the illogical relations
• Second test using Protege (4.3.0)
– Reasoner (HermiT 1.3.8, FaCT ++)
– included individuals from the UBER mappings
– work in progress

9. First Test - First Example
Inconsistent Inferred Axiom
Explanation:

10. First Test - Second Example
Inconsistent Inferred Axiom
Explanation:

11. Second Test with Individuals

12. Next Steps of UBER in WP2
DM2E model
• Analyse your mappings
– Which resources are not used?
– Are any resources missing?
• Revise the model
– A last time after the mapping analysis
DM2E to EDM
• XSLT from the specialised to the generalised model

13. OmNom (Konstantin, Kai)
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14. The DM2E Data Bridge
This is YOUR data.
This is the void:Dataset
in DM2E.
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DM2E Review: Work Package 2
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15. Some more links are actually available...
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16. Implementation
• Implementation (mostly) completed.
• Currently mainly testing, bug fixes and performance
tuning.
• Final version due: January 2014!
• Optimized visualization as eye candy (compare to
previous slide):
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17. RESTful Linked Data API
• Mostly unchanged since intermediate version.
• Feedback needed from WP3, but also from other
potential users of the data.
• Feature added on request: Data can be marked as
temporary (the default for now). So ingest and play
with it, it won‘t be carved in stone (yet).
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18. Alternative ingestion tool
• Fallback solution: Direct XSLT transformation and ingestion.
• Command line based, no GUI, only basic provenance information
(but complete).
• Why?
– Avoid bottleneck due to ongoing development of OmNom
– performance evaluations.
Available on request. Or provide links to your data files and an XSLT
mapping and we (Dominique, Kai) are happy to ingest for you.
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19. Single Sign On, Security (Jorge)
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20. Authentication Service
●
●
●
●
●
●
●
Centralized Authentication and Authorization Service
Centralized Storage of User Accounts
User Account Schema based on MINT Model.
Single Sign-On
Standard Based: JAAS, Web Services/SOAP
"Remember Me" support
Password reset support

21. Status
• Implementation of WS for Single Sign-on (WS-SSO) (
http://dm2e-security.rz-berlin.mpg.de/josso/).
• Implementation of a User Manager Application
integrated with WS-SSO (
http://dm2e-security.rz-berlin.mpg.de/userManager/).
• OmNom integration.
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22. Contextualisation (Dominique, Klaus)
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23. Status
• Evaluation of provided datasets regarding the
contextualisation.
• Setup of a Silk instance with preloaded
contextualisation targets (GND, LCSH).
• Planned: Geonames, VIAF, Yago, Freebase, DDC, InPho,
JudaicaLink, …
• Directly usable: Dbpedia
16.04.2013
DM2E Review: Work Package 2
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24. JudaicaLink (Dov, Kai)
• Permission to create and publish Linked Data from:
– Russian Jewish Encyclopedia (rujen.ru)
– YIVO Encyclopedia
• UMA hired a student assistant to work with both
encyclopedias and create Linked Data representations.
• More encyclopediae would be great (Contact Dov)
• Further information: JudaicaLink.org
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25. Deployment (Julia)
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26. Berlin Server
• What do we have?
– 2 Processors (Multicore)
– 64 GB RAM
– 4 TB Hard Drive (Usable space might be less, depends on
RAID configuration)
– That‘s all, we won‘t get more!
• UBER and UMA will reinstall the server from scratch.
• Virtual Machines:
– Ontologies, OWLIM, OmNom, Silk, Pundit, Redmine, …
• Downtimes in December, will be announced.
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27. Next steps
• 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
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28. Thank you.
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