1 The Web & Digital Humanities: What about Semantics? Lyon, WWW 2012 20 April 2012 Prof. Dr. Stefan Gradmann Humboldt-Universität zu Berlin / School of.

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Presentation transcript:

1 The Web & Digital Humanities: What about Semantics? Lyon, WWW April 2012 Prof. Dr. Stefan Gradmann Humboldt-Universität zu Berlin / School of Library and Information Science

2 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 Overview What are 'Digital Humanities'? How do they use 'semantic' technology? Issues Signification and Meaning Text, Context, Subtext Interpretation Logic How 'semantic' is the Semantic Web – as seen from the DH perspective? “Thinking in the Graph” - will Digital Humanists ever do so? Lyon

3 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 What are 'Digital Humanities'? A new discipline? Old disciplines turning 'digital'? “a field that is endlessly wrestling with its self- definition” (Tara L. Andrews) Or again Stephen Ramsay on “Who's in and Who's Out?” ( All scholarly efforts concerned with 'understanding' and 'interpretation' (e. g. literary criticism) in the digital and making use of digital instruments (e. g. digital narratology) As opposed (?) to empirically grounded scientific approaches (there are no “digital sciences”!) Risk of regression into sterile discourse of “two cultures” (C. P. Snow)

4 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 … and how do they use 'semantic' technologies? 3 examples

5 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 Processing of source data in the Humanities: aggregation...

6 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April modeling...

7 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April and Digital Heuristics?

8 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 Good Practices and Better Practices COST A32, Discovery, SemLib, Shared Canvas

9 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 'Discovery' Corpus: Digitised Manuscripts

10 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 HyperNietzsche: Digitisation, Presentation

11 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 HyperNietzsche: Transcription, Presentation

12 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 HyperNietzsche: Sources, Editions (synoptic)

13 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 Talia: Refactoring Hyper with Semantic Web Technology

14 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 Generating Stemmata based on Inferencing (1)

15 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 Generating Stemmata based on Inferencing (2) Abandoned!

16 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 Interpretation: Muruca

17 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 SwickyNotes: Ontology Based Annotation as Linked Open Data

18 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 SwickyNotes: Selecting Ontologies

19 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 “Cretans are always Liars” … annotated

20 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 SemLib SemLib ( is a continuation of Discovery in a EU funded project under FP7 working on A Tool to export existing metadata in RDF and publish it as Linked Data (Web of Data); A Semantic Annotation System, to exploit user- generated RDF metadata and publish it as Linked Data; A Semantic Recommender System, to use Linked Data to improve searching and browsing in the DLs.

21 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 Shared Canvas Shared Canvas ( is about annotation again – but in a much more sophisticated data model enabling multiple and potentially concurrent layered annotations. Demo at Common traits Use of RDF as underlying technology Emulation of well known annotation functionality on the Web

22 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 Scholarly Use of Semantic Technology … beyond Emulation of Annotation

23 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 Scholarly Primitives Discovering Annotating Comparing Referring Sampling Illustrating Representing „!“

24 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 Digital Humanities Functionality (WP3) Can we enable digital scholarship building on combined EDM metadata and digital surrogates... … building on an ontological, granular representation of John Unsworth's scholarly primitives (or their successors according to Blanke/Hedges 2011)? And what is the use of the resulting increasingly complex social semantic scholarly graph that extends the EDM data with RDF statements such as Version A – isSuccessorOf – Version B Scribe Y – copiedFrom – Scribe Z Statement 1 – contradicts - Statement 2 → what do you obtain from on inferencing on this graph … → and which are the limitations of such an approach?

25 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 WP3: Digital Humanities Related Engineering Goal: lower the barriers for digital content curation by providing an integrated, flexible, semantic based environment targeted to digital humanities scholars

26 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 Contextualisation

27 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 For Discussion

28 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 Modelling Documents as RDF Aggregations generates new questions... Where do resource aggregations 'start'? Where do they 'end'? And what constitutes document boundaries?? And which node was connected to which one at a given time??? A B C

29 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 Aggregations and Context: Calculating Closeness

30 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 How 'semantic' is it – as seen from the DH perspective? „I called this graph the Semantic Web, but maybe it should have been Giant Global Graph!“ (TBL, From a DH perspective, there is not much semantics here … … but the attribute has already been burnt, anyway :) “Thinking in the Graph” (TBL) - will DH ever do so? Our breakfast will not be in the Graph, nor other essentials But the bulk of our scholarship will be there quite soon, and we start realizing this → Time for the Linked Data Community to prepare for new challenges The discussion should not be about infrastructure but about epistemological foundations: this is where the issues are located!

31 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 Issues Signification and Meaning... much more than just names pointing to things How to model diachronous aspects? Text, Context, Subtext What about the explicit, the implicit and the things that are not said at all? Interpretation Is inherently non-deterministic! Logic: the AI rathole has never been appealing for DH Need of support for non-monotonous, non- deterministic, modal reasoning strategies Linked Data Quality, Versioning, Provenance...

32 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 Thank you!

33 The Web & Digital Humanities: What about Semantics? Stefan Gradmann. Lyon / WWW April 2012 Selected Reading Martin Doerr, Stefan Gradmann, Steffen Hennicke, Antoine Isaac, Carlo Meghini, Herbert van de Sompel (2010): The Europeana Data Model. IFLA 2010 (Gothenburg). Session on „Libraries and the Semantic Web“. Stefan Gradmann (2010): Knowledge = Information in Context: on the Importance of Semantic Contextualisation in Europeana. Europeana White Paper John Unsworth (2000): Scholarly Primitives. What methods do humanities researchers have in common, and how might our tools reflect this? In the seminar on Humanities Computing, King's College, London. Tobias Blanke, Mark Hedges (2011): Scholarly primitives. Building institutional infrastructure for humanities e-Science. Future Generation Computer Systems, Available online 13 July 2011,