co-funded by the European Union

Contextualisation

Dominique Ritze

Motivation

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Who is George Grote?

Which resources sharethe same subjects?

Example

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Work: Der zerbrochene Krug

Example

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Author: Ludwig Wittgenstein

Example

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Owner: Prinz Eugen von Savoyen

Example

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Subject: Adminstration

Example

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Place: Berlin

Overview

• Silk as Contextualisation Tool• System Integration• Contextualisation Progress and Results• Challenges• Applicability and Reuseability• Future Plans

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Contextualisation with Silk

• Silk: Link Discovery Framework (UMA)• Definition of linkage rules to create links between Linked

Data resources

• http://context.dm2e.eu918.06.2014

Intergration of Silk

• Silk is integrated in OmNom as Web Service

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use generatedconfiguration

show links

Access to Contextualisation Results

• Contextualization results (Linksets) are kept separate from ingested data

• Linksets are further described and versioned

• Additional linkset properties (tbd):– Automatically created– Manually created– Recall-oriented (exploratory, but with wrong links)– Precision-oriented (incomplete, but high quality)

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Used Linked Data Resources

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Geonames GNDLCSHDBPedia

Freebase

Places Subjects

Agents

DDCLinked

Geodata

Example Process

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• Manual creation of linkage rules, e.g. compareskos:prefLabel with rdfs:label using Levenstheindistance, link if distance < 2

• Let Silk run to find the links

Results

• Contextualised all datasets that are currently ingested-> no qualitative analysis so far

• increased the number of existing links by 20% (performance requirement)

• Different amounts of links were found– Dingler (UBER) 134 unique links– Deutsches Textarchiv (BBAW) 9946 unique links

• Potential to find more links1418.06.2014

Links in Pubby

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Links to DBPedia

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Links to GeoNames

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Links in Pubby

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Challenges

• In most cases, only a prefered label is available– Nancy France vs. Nancy Kentucky

• Very specific rules for different spellings/abbreviationsrequired– Frankfurt am Main vs. Frankfurt a.M. vs. Frankfurt a/M

• Unstructured data is not captured

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• Place: Wren Library, Trinity College Cambridge

• Agent: Georg Tanner, Maximilian II.

Unstructured Data

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Results unstructured data

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• Codices provenance

• WAB description

Applicability and Reuseability

• Created linkage rules can be reused but an adaptionmight be necessary

• Knowledge about the Silk framework and the similarityfunctions is required

• Access to the datasets is required (as dump or in a triplestore)

• Quality of the links is not ensured

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Future Work

• Evaluation of the detected links– Iterative process to improve the links

• Can we use existing information, e.g. already knownconnections to strenghen/weaken links?

• Questions that can be answered based on the links?– Where have the resources been published?– MarineLinves – Map of the ship routes

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