From e28b83ec08445458fa2ab0302c86a61e70755612 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Rabea=20M=C3=BCller?= <42644523+RabeaMue@users.noreply.github.com> Date: Fri, 17 Apr 2026 16:57:20 +0200 Subject: [PATCH] Add section on tools and services using Wikidata (closes #87) --- episodes/02-Wikidata_underlying_concepts.md | 77 ++++++++++++++++++--- 1 file changed, 66 insertions(+), 11 deletions(-) diff --git a/episodes/02-Wikidata_underlying_concepts.md b/episodes/02-Wikidata_underlying_concepts.md index 68df4f71..afcee521 100644 --- a/episodes/02-Wikidata_underlying_concepts.md +++ b/episodes/02-Wikidata_underlying_concepts.md @@ -6,9 +6,10 @@ exercises: 10 ::::::::::::::::::::::::::::::::::::::: objectives -- Know what a triple is, and relate structure of a Wikidata statement to traditional metadata field structure -- Know how linked data can create more context for patrons/users in library catalogs -- Know how linked data can improve recall in library catalogs? +- Know what a triple is, and relate structure of a Wikidata statement to traditional metadata field structure. +- Know how linked data can create more context for patrons/users in library catalogs. +- Know how linked data can improve recall in library catalogs. +- Be aware of tools and services built on top of Wikidata, such as Scholia and InteractOA. :::::::::::::::::::::::::::::::::::::::::::::::::: @@ -16,6 +17,7 @@ exercises: 10 - What is a RDF triple? - What are the underlying components of RDF? +- What tools and services are built on top of Wikidata? :::::::::::::::::::::::::::::::::::::::::::::::::: @@ -55,13 +57,6 @@ but with only three columns – the subject column, the predicate column, and th ![](fig/Data_Structure_Diagram.jpg){alt='A data structure diagram illustrating a possible connection between a list of triples, represented by a data dictionary, and a graph diagram which visualizes the relationships stipulated by the triples.'} -The scale of linked open data on the web can be visualized in the -[Linked Open Data Cloud](https://lod-cloud.net/), which shows the -connections between hundreds of open datasets. Note that this -visualization is updated regularly, so it will look different over time. - -![](https://lod-cloud.net/clouds/lod-cloud.svg){alt='Visualization of the Linked Open Data Cloud showing connections between hundreds of open datasets'} - ## 2\.2 Conceptual foundations: RDF and Triples The RDF defines a conceptual data model that is based on the idea of @@ -153,12 +148,72 @@ In the picture below the statement "Mae C. Jemison - part of - NASA Astronaut Gr :::::::::::::::::::::::::::::::::::::::::::::::::: +## 2\.4 Tools and services using Wikidata + +Wikidata's open data can be used and reused by anyone. A number of tools +and services have been built on top of Wikidata's database, demonstrating +its value as a linked open data resource. + +### The Linked Open Data Cloud + +Wikidata is part of a much larger ecosystem of linked open datasets. +The [Linked Open Data Cloud](https://lod-cloud.net/) visualizes the +connections between hundreds of open datasets on the web. Note that +this visualization is updated regularly. + +![](https://lod-cloud.net/clouds/lod-cloud.svg){alt='Visualization of the Linked Open Data Cloud showing connections between hundreds of open datasets'} + +### Scholia + +[Scholia](https://scholia.toolforge.org/) is a tool built on top of +Wikidata that visualizes scholarly profiles and research outputs. It has +no own database but queries Wikidata directly, which means any addition +to Wikidata is immediately reflected in Scholia. It is particularly +useful for librarians working with research information. + +:::::::::::::::::::::::::::::::::::::::: challenge + +### Explore a Wikidata item and its Scholia profile + +**Part 1: Wikidata item** + +Go to the Wikidata page of [Donna Haraway (Q253407)](https://www.wikidata.org/wiki/Q253407), +a feminist scholar and philosopher of science. + +- What statements can you find? +- What identifiers are listed? +- What links to other Wiki projects do you see? + +**Part 2: Scholia profile** + +Now go to the Scholia profile of +[Alex Bateman (Q18921408)](https://scholia.toolforge.org/author/Q18921408), +a bioinformatician with many publications in Wikidata. + +- How many publications are listed per year? +- What topics does his research cover? +- Who are his most frequent co-authors? +- Can you find the academic tree and citation statistics? + +:::::::::::::::::::::::::::::::::::::::::::::::::::: + +### InteractOA + +[InteractOA](https://interactoa.zbmed.de/) is another example of a +web service built on top of Wikidata. It visualizes genomic RNA +interaction networks based on data stored in Wikidata, linked directly +to the open-access articles that describe the evidence for these +interactions. It demonstrates that Wikidata can serve as a sustainable, +open database for specialized scientific knowledge. + + :::::::::::::::::::::::::::::::::::::::: keypoints - Triples are the basic data structure of graph databases, and they are the conceptual structure of Wikidata statements. -- Wikidata items are denoted by a human-readable label and a short description, and a unique identifer that begins with a Q. These items are the subjects of linked Wikidata statements. +- Wikidata items are denoted by a human-readable label and a short description, and a unique identifier that begins with a Q. These items are the subjects of linked Wikidata statements. - Wikidata defines relationships between items, also known as triple *predicates*, with Wikidata *properties*. - Wikidata statements can capture library information, such as relationships like creatorship, publication, aboutness, and more. +- Wikidata is part of a larger Linked Open Data ecosystem, and its data can be reused to build tools and services such as Scholia, InteractOA, and others. ::::::::::::::::::::::::::::::::::::::::::::::::::