Datasets in JudaicaLink

JudaicaLink provides structured datasets that integrate Jewish studies sources into a Linked Open Data (LOD) knowledge graph. These datasets are accessible via SPARQL queries, downloadable RDF dumps, and through the JudaicaLink API.

Available Datasets

The following datasets are included in JudaicaLink:

1. YIVO Encyclopedia

• Description: Biographical and historical entries from the YIVO Institute for Jewish Research.

• Entities: Persons, places, and organizations.

• Data Access:

  • SPARQL: Query at https://data.judaicalink.org/sparql.html

  • Entity Pages: https://data.judaicalink.org/data/html/yivo/

2. Stolpersteine in Mainz

• Description: Data on commemorative stones dedicated to Holocaust victims.

• Entities: Persons and memorial sites.

• Data Access:

  • SPARQL: Query dataset under stolpersteine

  • Entity Pages: https://data.judaicalink.org/data/html/stolpersteine/

3. Biographisches Handbuch der Rabbiner

• Description: Biographical records of Jewish rabbis from various historical periods.

• Entities: Persons, institutions, and related documents.

• Data Access:

  • RDF: https://data.judaicalink.org/dumps/rabbiner.rdf

  • SPARQL queries available for detailed searches.

4. Footprints - Jewish Books through Time and Place

• Description: A dataset tracing the movement of Jewish books across different regions and owners.

• Entities: Books, authors, owners, locations.

• Data Access:

  • SPARQL: Query at footprints dataset.

  • JSON-LD Access: https://data.judaicalink.org/data/jsonld/footprints/

5. Compact Memory (CM) Indexed Entities

• Description: Extracted named entities (persons, locations, topics) from historical Jewish periodicals.

• Entities: Persons, places, organizations, topics.

• Data Access:

  • SPARQL Query Example:

  SELECT ?entity ?label WHERE {
    ?entity a jl:Person ;
            rdfs:label ?label .
  } LIMIT 10
  

  • Content Negotiation: Available in RDF/XML, JSON-LD, and Turtle.

Using the Datasets

1. Querying Data with SPARQL

Users can run SPARQL queries against the JudaicaLink SPARQL Endpoint:

• Endpoint URL : https://data.judaicalink.org/sparql.html

• Example Query (Retrieve all persons in the dataset):

SELECT ?person ?name WHERE {
?person a jl:Person ;
        rdfs:label ?name .
} LIMIT 100

2. Downloading RDF Dumps

Users can download full dataset RDF dumps for offline use:

• Download URL: https://data.judaicalink.org/dumps/

• Example: Download yivo.rdf

wget https://data.judaicalink.org/dumps/yivo.rdf

3. Accessing Data via Content Negotiation

JudaicaLink supports content negotiation, allowing users to request data in different formats.

• Formats available: HTML, JSON-LD, RDF/XML, Turtle.

• Example Requests:

  • JSON-LD: https://data.judaicalink.org/data/jsonld/yivo/moses-mendelssohn

  • RDF/XML: https://data.judaicalink.org/data/xml/yivo/moses-mendelssohn

4. Using the JudaicaLink API

For automated access and data retrieval:

• Base API URL : https://data.judaicalink.org/api/

• Example API Query (Get data for an entity):

curl -H "Accept: application/json" https://data.judaicalink.org/data/jsonld/yivo/moses-mendelssohn

Next Steps

• Learn how to refine your SPARQL queries in the SPARQL Guide.

• Explore the Entity Pages to browse individual datasets.

• If you need help, check the FAQs or contact us at https://labs.judaicalink.org/contact/.