VinLOD Saga

A linked open data project

About the Project

Introduction

VinLOD Saga was inspired by a long-standing love for the anime Vinland Saga. Created by Makoto Yukimura, this story portrays many of the historical events that took place in the early 11th century between the English, and the vikings who had been hired by the Danish king, Sweyn Forkbeard in order to conquer England. This historical setting contrasts with the thematic elements of the story. Yukimura excels at exploring the tension between the human quest for love and the Norse idea of a true warrior.

The tug of war between theme and setting is exemplified in two of the main leads, Thorfinn and Canute. The former, Thorfinn, raised among the vikings rampaging through England; and the latter, Canute, raised as a Danish christian prince in the loving care of his retainer Ragnar. Each looking for a meaning to life while also taking it from others.

The characters are at the heart of Vinland Saga and so it was through the characters that the VinLOD project took shape. The first piece came from the word “vinland”, the name given to the part of North America said to have been first discovered by Leif Erikson. This was the first tug into the rabbit hole of Norse history, resulting in this ontology which brings the fictional to the historical through cultural heritage. It is a map of our travels along the routes and historical links that make up the story of Vinland Saga.

For the full documentation of the project see here.

About the Project

The Characters

Much like in Vinland Saga, the characters and their real-world historical counterparts hold the VinLOD Saga ontology together. They form the bridge between the fictional world of Vinland Saga and the real-world Norse cultural objects found in this ontology. It was through the historical characters and people that the objects were found and selected. Along with the historical characters, historical events were defined as entities to further enrich the connection between the fictional and the historical in our ontology.

Vinland Saga Canute
Canute

In Vinland Saga Canute is introduced as a sheltered quiet prince with no experiance of war but finds himself at the middle of the Danish invasion of England.
Historically, Cnut came to be king of not just Denmark but England and Norway too. As king he was known as Cnut the Great for his leadership and stregnth.

Vinland Saga Sweyn
Sweyn Forkbeard

While not a main character of the story, Sweyn in Vinland Saga acts in much the same way his historical counterpart, Sweyn Forkbeard did, setting into motion many of the events of the first part of the story.
After the massacre of Danes in England, known as the St Brice’s Day Massacre, he started the second viking invasion of England.

Vinland Saga Leif Erikson
Leif Erikson

In Vinland Saga, Leif Erikson is a family friend of the main character, Thorfinn.
He is introduced in the anime, regaling the children of Thorfinn's small Icelandic village with the tale of his discovery of a new land which he calls Vinland.
This discovery is credited to the real Leif Erikson, a Norse explorer from Greenland who found the land on a voyage from Norway to Greenland.
However, while this is the popular belief, some sources suggest that the discovery was actually made by Thorfinn Karlsefni, who Thorfinn is named after (although this is where the connection ends).

Vinland Saga Thorkell
Thorkell

Thorkell is a characters who was born for warfare and lives for the thrill of battle. He is a warlord with an extremely large build and inhuman strength. And being so hungry to continue the fight, he defects to the enemy's side. Thorkell the Tall was a real person with a several legendary stories associated with him. This is partly because of his affiliation and involvement with the Jomsvikings.
He also played a role in Cnut’s conquering of England, particularly in the Battle of Assandun.

Vinland Saga Jomsvikings
The Jomsvikings

In Vinland Saga, the Jomsvikings are military organizations of viking warriors. They are hired by the Danish king during the invasion of England. They stand as the symbol of warrior perfection, of vikings on their way to Valhalla.
In reality, the Jomsvikings were a semi-legendary group with tales of their battles described in manuscripts containing the Icelandic Saga of the Jomsvikings.
Most notable for this project is the Battle of Hjörungavágr, which is depicted in Vinland Saga.

Vinland Saga Valkyrie
The Valkyrie

While the Valkyrie are not direct characters of Vinland Saga, they do hold a key role in the beliefs of the vikings. In this belief, the Valkyrie carry the fallen soldiers to the hall of Valhalla where they can fight for eternity alongside Odin. This idea is explored in the story as characters speak of the glory and honour of dying in battle, juxtaposed with the spread of christianity in England and Denmark at the time.

About the Project

The Objects

After the characters and their historical connections were established, ten varied items were selected to connect our ontology to real-world objects. The team focused on choosing objects that could help build a cohesive narrative around the world of Vinland Saga. Each selection was carefully considered for its relevance and diversity, especially regarding its ties to characters, places, historical periods, and themes featured in the series.
Each entry below includes a short description, key metadata, and a reference link for further exploration.

Vinland Saga Manga
Vinland Saga Manga
Bibliographic Record

The original work of Vinland Saga, written and drawn by Makoto Yukimura.
It began serialisation in 2005 in the seinen comic magazine Gekkan Afutanūn (Monthly Afternoon).
Vinland Saga won the Grand Prize in the Manga Division at the 13th Japan Media Arts Festival in 2009.
It also won the 36th Kodansha Manga Award in the General category in 2012, which mangaka Makoto Yukimura accepted in full viking gear (MAL).

Vinland Saga Anime
Vinland Saga Anime
Bibliographic Record

The animated adaptation of the manga, which began airing in the summer of 2019.
The latest season aired in the summer of 2023.
The anime was very well received and critically acclaimed, thanks in part to the art and animation by the animators at studio Wit and studio MAPPA.

Coin of Cnut the Great
Coin of Cnut the Great
Coin

A commemorative or historical coin associated with King Cnut the Great, a powerful ruler of the early 11th century who reigned over England, Denmark, and Norway.
This numismatic artifact serves as tangible evidence of Cnut’s influence and the integration of Anglo-Saxon and Scandinavian cultures.

Page from Flatjarbok
Flateyjarbók
Manuscript Codex Digital Facsmile

A codex of medieval Icelandic manuscripts containing several sagas relating to Norse history. This item was chosen in particular because of its inclusion of sagas which directly relate to the discovery of vinland, namely, the Saga of Erik the Red and the Saga of the Greenlanders. It also includes the Saga of the Jomsvikings which relates to the semi-legendary viking group and to Thorkell the Tall.

First page from The Finding of Wineland the Good
The Finding of Wineland the Good
Translated Edition Digital Facsmile

An English translated edition which aims to piece together a complete story of the discovery of Vineland through a collation of various medieval Icelandic manuscripts.
The editor, Author Middleton Reeves, includes notes and explanation of all the manuscript sources, highlighting the similarities and contradictions among them, particularly about who really discovered Vinland.
However, for the purposes of this project, the section of text used is the one which upholds that Leiv Eirikkson made the discovery.

Leif Erikson Discovering America
Leiv Eiriksson discovering America
Painting

A painting by the Norwegian painter, Christian Krohg, depicting the discovery of America (Vinland) by the Norse explorer Leiv Eirikkson.
In the painting Leiv and his crew look out across to the sea to a small patch of green land to the left of the horizon.
This scene adds to the common belief that it was Leiv who made the famous first discovery of America, although there are some sources which contradict this.

Ride of the Valkyrie score opening page
Ride of the Valkyrie
Orchestral Performance - Recording

The Ride of the Valkyries is the prelude to the first scene of the last act of Die Walküre, the second of the four epic music dramas that constitute the operatic cycle The Ring of the Nibelung composed by Richard Wagner in the 19th century.
This recording features a performance given by the American Symphony Orchestra in 1921.

Illustration of the battle of Hjoerungavaag
The hailstorm during the Battle of Hjǫrungavágr
Illustration

An illustration by Halfdan Egedius, created for the 1899 edition of Olav Trygvasons saga by Snorre which depicts the legendary Battle of Hjörungavágr.
The scene captures the fierce clash between the Jarls of Lade and the formidable Jomsvikings, set against the backdrop of Haakon Sigurdsson’s fight to secure control over Norway.

Poetic Edda cover
The Poetic Edda
Translated Edition

A collection of Old Norse poems preserved mainly in the 13th century manuscript Codex Regius and translated by Henry Adams Bellow, including mythological and heroic narratives central to Norse tradition.

Vinland Saga OP1
Vinland Saga Opening 1
Video

The first opening theme of the anime Vinland Saga, performed by the Japanese band Survive Said The Prophet.
While not technically a cultural heritage object, we chose this to diversify and enrich the Japanese media part our ontology — proving, too, that anything can be described or connected.

Metadata Analysis

Object Metadata standards

Metadata are structured information that describe, explain, locate, or otherwise make it easier to retrieve, use, or manage an information resource. They are essential for resource discovery, interoperability, and digital preservation. For some of the objects in the ontology, the metadata was available to download in one of the file formats listed in the “Provided Metadata” column. When the metadata was not available for download, we collected the metadata into tables aligning them with selected metadata standards based on the characteristics of the objects, aiming to identify the most suitable match between each standard and the nature of the content.

# Object Name Object Type Provider Provided Metadata Converted Metadata
01 Vinland Saga Manga Manga Record MyAnimeList / JVMG/ACLICK
02 Vinland Saga Anime Anime Record aniDB / JVMG/ACLICK
03 Coin of Cnut the Great Coin Münzkabinett Berlin NMO/LIDO-XML NMO/DCTERMS
04 Flateyjarbók Manuscript Codex - Digital Facsmile The Árni Magnússon Institute for Icelandic Studies - handrit.is TEI/XML BIBFRAME/DCTERMS
05 The Finding of Wineland the Good Translated Edition - Digital Facsmile Internet Archive MARCXML BIBFRAME
06 Leiv Eiriksson discovering America Painting National Museum of Norway / SCHEMA/DCTREMS
07 Ride of the Valkyrie Orchestral Performance - Recording gutenberg.org / BIBFRAME/DCTERMS
08 The hailstorm during the Battle of Hjǫrungavágr Illustration Wikimedia / SCHEMA/DCTREMS
09 The Poetic Edda Translated Edition - Digital Text gutenberg.org MARCXML BIBFRAME
10 Vinland Saga Opening 1 Video Youtube - Crunchroll / SCHEMA

Metadata Standard Description

JVMG and ACLICK

These are both metadata vocabulary from the Japanese Visual Media Graph Project. JVMG is the main graph with ACLICK as a smaller graph based on data from the Italian anime database Anime Click. It covers entities and relationships related to anime and manga media. We used its vocabulary to describe both the Vinland Saga anime and the manga.

LIDO and NMO

LIDO (Lightweight Information Describing Objects) is a standard designed to focus on museum and collection metadata; NMO (Numismatic Ontology) is tailored specifically for the structured description of coins and monetary objects. In our project, we used these domain-specific standards for the Cnut Coin.

TEI/XML

XML is a flexible markup language used to structure, store, and share textual data in a machine-readable way. TEI is a specialised set of guidelines built on XML, designed to encode literary, historical, and linguistic texts with rich semantic detail. In our project, we used TEI to encode our two text objects, capturing their structure, references, and thematic connections.

MARC21 and BIBFRAME

MARC21 is the traditional standard used for cataloguing and exchanging bibliographic data in libraries, often written in XML. BIBFRAME is a modern data model created to replace MARC21, adopting linked data principles to make bibliographic information more accessible and reusable beyond the library context. In our project, we used BIBFRAME to describe the Finding of Wineland digitised book, the digital text of the Poetic Edda, and the recording of Wagner’s Ride of the Valkyries.

DCTERMS

DCTERMS is a set of metadata terms maintained by the Dublin Core™ Metadata Initiative, which includes and extends the original fifteen terms of the Dublin Core™ Metadata Element Set with several properties, classes, datatypes and vocabulary encoding schemes. These terms are expressed in RDF vocabularies for use in Linked Data. Thanks to its flexibility, we used this standard with the Leif Erikson discovering America painting, the Flateyjarbok manuscript, and Wagner’s Ride of the Valkyries recording.

SCHEMA

Founded by Google, Microsoft, Yahoo and Yandex, Schema.org provides a vocabulary that can be used with different encodings, including RDFa, and developed by an open community process. Covering entities, relationships between entities and actions, we used its versatile vocabulary to describe the Vinland Saga opening video, the Leif Erikson discovering America painting and the Hailstorm during the battle of Hjörungavágr illustration.

CIDOC-CRM and FRBRoo

CIDOC-CRM is a formal ontology developed by ICOM to support semantic interoperability and data integration in cultural heritage. Combined with FRBRoo, a harmonization of CIDOC-CRM with the FRBR model, it also covers bibliographic entities like works and expressions. We use it to model relationships among fictional characters, historical figures, abstract concepts, and events.

Metadata Representation

Encoded Texts

We created two XML/TEI files of two of the texts among our objects, the Grimnismol poem from Henry Adams Bellows’s translation of the Poetic Edda and an extract from the digitised book Finding of Wineland the Good. With TEI we linked the various people and places mentioned in our texts to related resources on the web to ensure interoperability. We then converted the xml files, first to html for visualisation (available through the links above) and then lastly into RDF to semantically link them to the objects and entities in our ontology.

The directory to the encoding files can be found here.

Metadata Representation

Theoretical Map

Our initial sketch of the ontology, where we first visualised the relationships between the objects, entities and story of Vinland Saga. The map also visualises the structural role of the characters, people and events in linking the objects to the central work. All the relationships here are described in plain natural language.

Metadata Representation

Conceptual Map

The translation of the natural language in the theoretical model into metadata standard vocabularies to ensure data-interobility and machine-readability of the data.

Metadata Representation

RDF Visualisation

An RDF (Resource Description Framework) representation is a structured way of describing data using triples: subject, predicate, and object. These triples form a graph where each node represents a resource or a value, and the edges represent relationships between them. It enables data to be linked and understood across different systems, making it a key technology for the Semantic Web.

Based on our theoretical and conceptual models, we described each of our objects in RDF turtle, assigning a unique URI to each of our objects and entities to connect them all within our ontology. Finally we compiled all the turtle files into a single large dataset. This is the representation of our model in the form of an RDF graph.

All the turtle files are available here.

The Team

Ilaria De Dominicis

Regina Manyara