A

A LINKED OPEN DATA PROJECT ON
ALAN TURING'S LEGACY

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Study of the domain

"This is only a foretaste of what is to come, and only the shadow of what is going to be"
The Times Newspaper, 11 June 1949

September 1939. With the German invasion of Poland, the United Kingdom and France declare war on the Third Reich: it is the beginning of the Second World War, a conflict that will change the world.
Around the same time, in Bletchley Park (Buckinghamshire, UK) the Government Code and Cypher School starts working on understanding the German Enigma machine, a cipher device employed extensively by Nazi Germany and extremely secure because of the daily switch of the machine settings.
Cracking Enigma was considered fundamental to win the conflict, and a large staff of cryptographers was involved for this purpose in September 1939. Amongst them there was the young mathematician Alan Turing.
Already interested in subjects such as relative computing, Turing was also keen on cryptanalysis and he played a crucial role in improving the cracking of intercepted coded messages. Testifying his work, in 1940 Turing wrote the report "Treatise on the Enigma", also known as "The Prof's Book" from the nickname given to him by his colleagues at Hut 8, in Bletchley.

Aerial Photo of Bletchley Park
Post war aerial view of Bletchley Park (©Bletchley Park)


Bombe Control
Bombe Control Room (©Bletchley Park)

Despite his contribution to many scientific fields, Turing was isolated from the professional world because of his conviction for gross indecency for homosexual acts in 1952. Only after many public requests the Government granted him an apology and Queen Elizabeth II officially pronounced Turing pardoned in August 2014.
Nonetheless, over the years Turing has been broadly celebrated and remembered: in 1996 the BBC broadcast "Breaking the Code", a television movie focused on the mathematician's life; in 1998 an official English Heritage blue plaque was unveiled at his birthplace in London and in 2014 the movie "The Imitation Game" was theatrically released, receiving many nominations and winning an Academy Award.
Finally, in 2012, on the 100th anniversary of his birth, many more organisations and institutions all over the world honoured Turing and his legacy. Some examples include, but are not limited to: the Italian graphic novel "Enigma: la strana vita di Alan Turing"; the Google Doodle depicting a live action Turing Machine and the Alan Turing Centenary Conference, an academic conference hosted by the University of Manchester, where Turing worked up until his death.


Bletchley Park
Bletchley Park
Photograph of Bletchley Park, centre of the british "Government Code of Cypher School" during World War II
Enigma
Enigma
Three-ring Enigma machine used during World War II by Germany and its allies to encrypt military messages
Alan Turing Portrait
Alan Turing Portrait
Portrait of Alan Turing taken a few years before his death and donated to the National Portrait Gallery by his mother
Treatise on the Enigma
"Treatise on the Enigma"
Photocopied typescript of Alan Turing's notes on the deciphering of Enigma
Breaking the Code
"Breaking the Code"
Television movie produced in 1996 retracing Turing's life from his cryptographic activities during World War II up to his dramatic death
The Imitation Game Original Soundtrack
"The Imitation Game" Original Soundtrack
Alexander Desplat's mesmerizing soundtrack accompanying "The Imitation Game" movie, released in 2014
Google Doodle 100th Birthday
Google Doodle 100th Birthday
Interactive Doodle realized by Google to celebrate the centenary of Turing's birth in 2012
Graphic Novel Enigma
"Enigma: la strana vita di Alan Turing"
Italian Graphic Novel by Tuono Pettinato focusing on the personal aspects of Turing's life and his undecryptable personality
Plaque
Alan Turing Blue Plaque
Blue Plaque erected in 1998 by English Heritage to commemorate Turing's pioneering contributions
Centenary Conference
Centenary Conference
Set of Conferences held in Manchester celebrating Turing's 100th Birthday in 2012

Knowledge Organization

Once chosen the domain of study and the 10 items that characterise it, all coming from different kinds of institutions (such as libraries, archives and museums), the first step in analysing them is the Knowledge Organization Process, through which the acquired data are described and represented through models, reflecting different levels of abstraction.

Conceptual Map

The Conceptual Map provides a first look into the descriptive process, depicting all the data coming from the different items using natural language and making the relationships between them and the core idea explicit.

Conceptual Map

E/R Model

The Conceptual Map is then translated into an E/R Model, a visual representation that allows to describe the data with a higher level of abstraction, rendering people, places, dates and subjects as Entities and their connections as Relationships.

E/R Model


Metadata Analysis

The following step consists of coming back to the institutions and providers of the items to better analyse the metadata used for describing them by identifying which standards and general guidelines were followed.
Certain institutions clearly stated which standard they applied (marked with an asterisk in the following table), while, where a proper declaration wasn't available, we decided to apply either the most common standard generally used by that kind of institution or a more generic metadata standard we considered suitable for the specific provider.

Item Item Type Provider Metadata Standard
Treatise on the Enigma Text The National Archives *EAD
Three-ring Enigma machine Object Mathematics: The Winton Gallery (Science Museum Group) CDWA CCO
Breaking the code Movie Princeton University Library MARC21
Enigma:la strana vita di Alan Turing Text OPAC SBN *MARC21
Alan Turing's 100th Birthday Doodle Digital Art Google Doodle Archive Schema.org
Alan Turing Centenary Conference Video University of Manchester/Videolectures.net Dublin Core
Photograph of Bletchley Park Object Getty Images Archive *CDWA CCO
Portrait of Alan Turing Object National Portrait Gallery CDWA CCO
Alan Turing Blue Plaque Object English Heritage *MIDAS
The Imitation Game: Original Motion Picture Soundtrack Audio OPAC SBN *MARC21

Metadata Alignment

Once defined the different standards, a further stage required to compare and align the metadata elements and properties notable for the description of the domain according to the standards' vocabularies and rules.
Missing correspondences are identified by "N/A", while missing comparisons in the CCO vocabulary have been taken, when available, from its superset: the CDWA guidelines (marked with an asterisk in the following table).

Property Dublin Core Schema.org MARC21 EAD CCO (CDWA*) MIDAS
Creator dcterms:creator author, creator, producer, composer, director 100 < author >, <origination> Creator Display (specify Creator Extent, Creator Role) Person Name, Organization Name (specify Role)
Contributor dcterms:contributor contributor 511 N/A Creator Display (specify Creator Extent, Creator Role) Person Name, Organization Name (specify Role)
Ownership record dcterms:provenance N/A 6xx, 0xx <acqinfo> *23. Ownership/Collecting History, 23.1.Provenance Description, 23.1.1 Aquisition Description N/A
Publisher dcterms:publisher publisher 260$b, 264b, 710 <publisher> N/A N/A
Property Dublin Core Schema.org MARC21 EAD CCO (CDWA*) MIDAS
Comments N/A N/A 5xx <note> Remarks N/A
Description dcterms:description description 520 <archdesc> Description Description (specific element for Inscription Content)
Event dcterms:event event, recordedAt N/A <event> *17. Context, 17.1. Historical/Cultural Events Historical Event
Format dcterms:format, dcterms:extent encodingFormat 007/00=c, 256 N/A Format N/A
Identifier dcterms:identifier identifier 001, 02x <eadid>, <archref> *21.2.3. Repository Number Primary Reference Number
Language dcterms:language inLanguage 041 <language> Language Language
Physical Description dcterms:format, dcterms:medium material, materialExtent 007, 3xx <filedesc>, <physdesc>, <dimensions> Physical Description, Measurements Display Material, Archive/Source Format
Subject dcterms:subject about 6xx <subject> Subject Display, Subject Subject
Type dcterms:type additionalType, category 008, 336 <genreform> Work Type Artefact Name Type, Production Technique
Title dcterms:title name 240 <title> Title Information Source Title
Title Variant dcterms:alternative alternateName 246 N/A *3.3 Preference (for preferred alternative form of the title name) N/A
Rights dcterms:rights license 017, 540 <userestrict> *22.1. Copyrights Satement Right Note
Property Dublin Core Schema.org MARC21 EAD CCO (CDWA*) MIDAS
Creation Date dcterms:created dateCreated 264$c, 388 <unitdate> Display Date Display Date
Publication Date dcterms:available datePublished, releasedEvent 260 $c, 264 $c <date> N/A N/A
Property Dublin Core Schema.org MARC21 EAD CCO (CDWA*) MIDAS
Location dcterms:spatial spatial 852 <phisloc> Current Location Storage Location
Creation/Publication Location N/A countryOfOrigin, locationCreated 260 $a, 264 $a <originalsloc> Creation Location Locality, Named Location
Collection/Part Of dcterms:isPartOf isPartOf 830, 852 $b N/A *20.2. Work Broader Context N/A
Depicted Location dcterms:subject contentLocation 6xx <subject> Subject Display, Subject Subject

Theoretical Model

A deeper level of interpretation of the data is the one displayed in the Theoretical Model: here, starting from the items, subjects and general relationships inside the study domain, the Web is searched for additional relevant information, with the goal of specifically answering to the following questions:

  • Who: to add information concerning people and their role and position regarding the subject of the study;
  • What: for the description of the objects (e.g. their scopes, relevance or peculiar features);
  • Where: for the characterisation of places and meaningful locations;
  • When: to add details on notable dates or relative events.

Theoretical Model

Enhanced E/R Model

The Theoretical Model produced according to natural language is then translated again following an Entity/Relationships approach into the Enhanced E/R Model that will be a refined version of the previous E/R Model reflecting the later enrichments.

Enhanced E/R Model

Conceptual Model

At this stage an ultimate level of abstraction is provided, moving from the theoretical model to the formal representation given by the Conceptual Model.
Here an ontological approach is followed and the subjects/concepts and relationships depicted in the theoretical model are refactored according to the most suitable classes and properties found in already existing schemas, vocabularies and ontologies.

Conceptual Model

Knowledge Representation

At this point the data description has been exhaustively completed and the modelling activity can be considered fulfilled, leading to the next stage of the workflow, that is the one concerned with the production of new semantic data: the Knowledge Representation.

Items Description

Going back to the chosen items, each one is described according to the properties already adopted in the Conceptual Model, realising one table for each item where the three columns correspond to the triple's elements -subject, predicate, object- and each row represents a statement.

CSV versions of the following tables can be downloaded by clicking here!

Subject Predicate Object
Treatise on The Enigma eac-cpf:languageUsed English
Treatise on The Enigma crm:P53_has_former_or_current_location King's College Archive Centre
Treatise on The Enigma dcterms:type Photocopied Typescript of the treatise
Treatise on The Enigma dcterms:created c.1939-c.1942
Treatise on The Enigma dcterms:subject Three-ring Enigma cypher machine
Treatise on The Enigma dcterms:creator Alan Turing
Subject Predicate Object
Alan Turing Centenary Conference Opening dcterms:date 2012
Alan Turing Centenary Conference Opening dcterms:creator Barry Cooper, Stephen Furber
Alan Turing Centenary Conference Opening dcterms:isPartOf Alan Turing Centenary Conference 2012
Alan Turing Centenary Conference Opening frbr:ResponsibleEntityOf University of Manchester
Alan Turing Centenary Conference Opening dcterms:spatial Manchester
Alan Turing Centenary Conference Opening dcterms:subject Alan Turing
Subject Predicate Object
Photo of Bletchley Park crm:P62_depicts Bletchley Park
Photo of Bletchley Park dcterms:creator Evening Standard
Photo of Bletchley Park frbr:ResponsibleEntity Getty Images Archive
Photo of Bletchley Park dcterms:isPartOf Hulton Archive
Photo of Bletchley Park dcterms:created 7 January 1926
Subject Predicate Object
The Imitation Game Soundtrack dcterms:title The Imitation Game: Original Motion Picture Soundtrack
The Imitation Game Soundtrack dcterms:created 2014
The Imitation Game Soundtrack dcterms:spatial New York
The Imitation Game Soundtrack dcterms:creator Alexandre Desplat
The Imitation Game Soundtrack dcterms:publisher Sony Music Entetainment
The Imitation Game Soundtrack dcterms:type Music Record
The Imitation Game Soundtrack dcterms:subject Alan Turing
Subject Predicate Object
Alan Turing Google Doodle dcterms:contributor Jared Wierzbickb, Corrie Scalisi
Alan Turing Google Doodle dcterms:publisher Google Doodle Archive
Alan Turing Google Doodle crm:P101_has_title Alan Turing 100th Birthday
Alan Turing Google Doodle dcterms:creator Sophia Foster-Dimino
Alan Turing Google Doodle dcterms:type Digital art
Alan Turing Google Doodle dcterms:available 2012
Alan Turing Google Doodle dcterms:subject Alan Turing
Subject Predicate Object
Three-ring Enigma cypher machine crm:P53_has_former_or_current_location Germany
Three-ring Enigma cypher machine dcterms:creator Arthur Scherbius
Three-ring Enigma cypher machine dcterms:type Cypher machine
Three-ring Enigma cypher machine dcterms:created 1934
Three-ring Enigma cypher machine crm:P45_consists_of Mixed Materials
Subject Predicate Object
Breaking the code dcterms:type Video/Projected Medium
Breaking the code crm:P108_was_produced_by Herbert Wise
Breaking the code schema:director Cypher machine
Breaking the code dcterms:created 1997
Breaking the code crm:P72_has_language English
Breaking the code dcterms:subject Alan Turing
Breaking the code crm:P53_has_former_or_current_location Princeton University
Subject Predicate Object
Graphic Novel on Alan Turing's life crm:P72_has_language Italian
Graphic Novel on Alan Turing's life dcterms:type Graphic Novel
Graphic Novel on Alan Turing's life bibframe:originDate 2012
Graphic Novel on Alan Turing's life dcterms:subject Alan Turing
Graphic Novel on Alan Turing's life dcterms:creator Tuono Pettinato
Graphic Novel on Alan Turing's life bibframe:title Enigma: La strana vita di Alan Turing
Graphic Novel on Alan Turing's life crm:P53_has_former_or_current_location Princeton University
Graphic Novel on Alan Turing's life bibframe:agent Rizzoli Lizard
Subject Predicate Object
Blue Plaque Alan Turing schema:address 2 Warrington Cresent, Maida Vale, London
Blue Plaque Alan Turing dcterms:creator English Heritage
Blue Plaque Alan Turing dbpedia-owl:inscription Alan Turing 1912-1954 Code-breaker and Pioneer of Computer Science was born here
Blue Plaque Alan Turing crm:P45_consists_of Ceramic
Blue Plaque Alan Turing dcterms:subject Alan Turing
Subject Predicate Object
Portrait photo of Alan Turing dcterms:type Portrait
Portrait photo of Alan Turing dcterms:creator Elliot & Fry
Portrait photo of Alan Turing crm:P53_has_former_or_current_location National Portrait Gallery
Portrait photo of Alan Turing crm:P45_consists_of Bromide print
Portrait photo of Alan Turing dcterms:created 29 March 1951
Portrait photo of Alan Turing crm:P62_depicts Alan Turing
Portrait photo of Alan Turing crm:P49_has_former_or_current_keeper Ethel Sara Turing

RDF Production

Three significant items coming from different institutions have then been selected as subjects of the RDF Production process: first, the following URIs were created to describe significant entities of the chosen items; then, the prefixes for the chosen ontologies were declared and triples were written according to a Turtle serialisation, highlighting relations between the items and their entities, and, where possible, linking to other significant related resources and authorities (e.g. VIAF for personal and corporate names, GeoNames for places and locations, Getty AAT vocabulary for existing concepts).

https://w3id.org/alodturing
https://w3id.org/alodturing/item/photo-bletchley-park
https://w3id.org/alodturing/item/enigma-machine
https://w3id.org/alodturing/item/treatise-enigma

https://w3id.org/alodturing/place/bletchley-park
https://w3id.org/alodturing/place/germany

https://w3id.org/alodturing/date/7january1926
https://w3id.org/alodturing/date/23june1912
https://w3id.org/alodturing/date/7june1954
https://w3id.org/alodturing/date/1939-1942
https://w3id.org/alodturing/date/1934
https://w3id.org/alodturing/event/world-war-ii

https://w3id.org/alodturing/group/GCCS
https://w3id.org/alodturing/institution/national-museum-computing-bletchley-park
https://w3id.org/alodturing/institution/university-cambridge
https://w3id.org/alodturing/institution/kings-college-archive-centre

https://w3id.org/alodturing/object/alan-turing-statue
https://w3id.org/alodturing/object/cypher-machine

https://w3id.org/alodturing/person/alan-turing

RDF Visualization

RDF Visualization