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Revision as of 11:28, 4 April 2023

Overview

The Aktienführer (AKF) Knowledge Graph is free and open. It contains structured (meta)data for the German listed stock companies from the Hoppenstedt-Aktienführer from 1956 to 2018. The metadata includes official company names with time ranges, company identifiers (ISIN and WKN) and Aktienführer IDs.

We enriched metadata via entity linking with other databases: Creditreform, Bureau van Dijk Orbis, GND and Wikidata. The knowledge graph contains 342 external identifiers representing various databases, including the valuable company databases: Crefo number, BvD ID, Orbis ID, Handelsregisternummer, PM20 folder ID, European VAT number, D&B Hoovers company profile, Bloomberg company ID, ROR ID, Legal Entity Identifier (LEI), Google Knowledge Graph ID, PermID, OpenSanctions ID, LinkedIn organization ID, German Lobbyregister ID, North Data ID and OpenCorporates ID.

Access to (meta)data

The AKF (meta)data is accessible by both humans and machines.

License:
List of properties
List of items
Advanced search for items
SPARQL endpoint
API
Export to CSV
Every entity can be downloaded in .json, .rdf, .ttl, .nt and .jsonld formats. An example for BASF: https://akf.kgi.uni-mannheim.de/entity/Q425.json, https://akf.kgi.uni-mannheim.de/entity/Q425.rdf, https://akf.kgi.uni-mannheim.de/entity/Q425.ttl, https://akf.kgi.uni-mannheim.de/entity/Q425.nt and https://akf.kgi.uni-mannheim.de/entity/Q425.jsonld.

Use Cases

Searching identifiers of German companies for the period 1956-2018
Matching your (meta)data to AKF companies
Clean your tabular data and match it to the AKF knowledge graph with OpenRefine
Semantic annotation of tabular data using the AKF knowledge graph with bbw
Federated queries over AKF, Wikidata and other SPARQL endpoints

Get involved

You can contribute to this project in various ways: matching data, data quality checks and data editing/upload.
You can get an account here via email request to the Research Data Center at UB Mannheim. Please write "Request an account at the AKF KG" as a subject.
If you are new to knowledge graphs, check out materials at Wikibase Knowledge Graphs.
The AKF knowledge graph is based on Wikibase, the software behind Wikidata. Therefore the Wikidata tutorials are also highly recommended.

External Resources

AKF OCR-ed texts
AKF Structured Database with full data: Restricted access for research purposes only
Hoppenstedt Aktienführer at Wikipedia
Gehrlein, Sabine et al.: Vom Papier zur Datenanalyse. „Neue“ historische Forschungsdaten für die Wirtschaftswissenschaften, in: E-Science-Tage 2019: Data to Knowledge, Heidelberg: heiBOOKS, 2020. https://doi.org/10.11588/heibooks.598.c8423

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-==Aktienführer Knowledge Graph==
+==Overview==
 The Aktienführer (AKF) Knowledge Graph is free and open. It contains structured (meta)data for the German listed stock companies from the Hoppenstedt-Aktienführer from 1956 to 2018. The metadata includes official company names with time ranges, company identifiers (ISIN and WKN) and Aktienführer IDs.
 *[https://akf.kgi.uni-mannheim.de/wiki/Property:P346 official name]
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 We enriched metadata via entity linking with other databases: [https://www.creditreform.com Creditreform], [https://www.bvdinfo.com/de-de/unsere-losungen/daten/international/orbis Bureau van Dijk Orbis], [https://www.dnb.de/DE/Professionell/Standardisierung/GND/gnd_node.html GND] and [https://www.wikidata.org Wikidata]. The knowledge graph contains [https://akf.kgi.uni-mannheim.de/w/index.php?title=Special:ListProperties/external-id&limit=500&offset=0 342] external identifiers representing various databases, including the valuable company databases: [https://akf.kgi.uni-mannheim.de/wiki/Property:P5 Crefo number], [https://akf.kgi.uni-mannheim.de/wiki/Property:P6 BvD ID], [https://akf.kgi.uni-mannheim.de/wiki/Property:P8 Orbis ID], [https://akf.kgi.uni-mannheim.de/wiki/Property:P9 Handelsregisternummer], [https://akf.kgi.uni-mannheim.de/wiki/Property:P343 PM20 folder ID], [https://akf.kgi.uni-mannheim.de/wiki/Property:P10 European VAT number], [https://akf.kgi.uni-mannheim.de/wiki/Property:P25 D&B Hoovers company profile], [https://akf.kgi.uni-mannheim.de/wiki/Property:P36 Bloomberg company ID], [https://akf.kgi.uni-mannheim.de/wiki/Property:P126 ROR ID], [https://akf.kgi.uni-mannheim.de/wiki/Property:P146 Legal Entity Identifier (LEI)], [https://akf.kgi.uni-mannheim.de/wiki/Property:P161 Google Knowledge Graph ID], [https://akf.kgi.uni-mannheim.de/wiki/Property:P162 PermID], [https://akf.kgi.uni-mannheim.de/wiki/Property:P251 OpenSanctions ID], [https://akf.kgi.uni-mannheim.de/wiki/Property:P276 LinkedIn organization ID], [https://akf.kgi.uni-mannheim.de/wiki/Property:P275 German Lobbyregister ID], [https://akf.kgi.uni-mannheim.de/wiki/Property:P300 North Data ID] and [https://akf.kgi.uni-mannheim.de/wiki/Property:P334 OpenCorporates ID].
-==Access to AKF (meta)data==
+==Access to (meta)data==
 The AKF (meta)data is accessible by both humans and machines.
 *License: