Open Knowledge Graphs

Discover knowledge graphs, ontologies, tools, and jobs across the open knowledge ecosystem.

[Open Knowledge Graphs @OpenKGraphs]

Knowledge graphs, ontologies, tools, and jobs—find them at Open Knowledge Graphs.

We’re building an open directory to help you discover what’s out there and who’s building it.

Explore: https://t.co/sqKt9UuVod

What should we add next?

[Open Knowledge Graphs @OpenKGraphs]

📦 Software Release: Ontology Development Suite 0.15.0

Build and check OWL ontologies in VS Code. This release expands TypeScript scripting to cover individuals, property chains and datatype constraints.

https://t.co/9UkORX94iI

#Ontologies

[Open Knowledge Graphs @OpenKGraphs]

📦 Software Release: LinkML-Scala 0.17.0

Turn data models into code and validation rules. This release adds OWL/RDFS import and export, plus TypeScript and Pydantic generators.

From @NeverBlinkEU

https://t.co/u59cgOU5RY

#LinkML

[Open Knowledge Graphs @OpenKGraphs]

📚 Standards Spotlight: EML

Ecological Metadata Language describes where, when and how data was collected, plus what its columns mean—helping others reuse it.

Supported by @ucsb_nceas

https://t.co/WaGk8Ax68q

#Metadata #OpenScience

[Open Knowledge Graphs @OpenKGraphs]

📚 Standards Spotlight: DDI

Sharing survey data? DDI standards describe questions, variables and how data was collected, helping others understand and reuse it.

From @DDIAlliance

https://t.co/qS000AbMFX

#Metadata #OpenData

[Open Knowledge Graphs @OpenKGraphs]

🔎 Open-Source Spotlight: Comunica

RDF data spread across different sources? Comunica lets you query them together with SPARQL, from JavaScript applications or the command line.

https://t.co/QUccTX7VaI

#KnowledgeGraphs #SPARQL

[Open Knowledge Graphs @OpenKGraphs]

📦 Software Release: TuringDB 3.0.1

TuringDB is a graph database queried with Cypher. This release expands support for conditional queries, lists and maps, with fixes for data imports and vector indexes.

https://t.co/0kaeQFpu9a

#KnowledgeGraphs #Cypher

[Open Knowledge Graphs @OpenKGraphs]

📦 Software Release: Fluree 4.2.3

Fluree is a knowledge graph database. This release adds SPARQL request options and more control over querying across named graphs.

https://t.co/oU6snEmQqi

#KnowledgeGraphs #SPARQL

[Open Knowledge Graphs @OpenKGraphs]

📚 Vocabulary Update: SOSA/SSN

SOSA/SSN describes sensors, observations, sampling and actuation. A new W3C working draft organizes these into modules, helping projects use the pieces they need to connect measurement data.

https://t.co/4m2Gkg84nW

#SemanticWeb #IoT

[Open Knowledge Graphs @OpenKGraphs]

💼 Reddit is hiring a Staff ML Engineer, Ads Foundational Representations.

Work on knowledge graph and content embeddings for ad relevance and business insights.

📍 Remote · UK / Netherlands

https://t.co/LjCW4AOVVv

#KnowledgeGraphs #Hiring @Reddit

[Open Knowledge Graphs @OpenKGraphs]

🧬 Vocabulary Update: Uberon

Uberon gives anatomical structures shared identifiers, helping connect tissue and cell data. Its October 1 release expands coverage using the Human Reference Atlas.

@uberanat @chrismungall

https://t.co/PS8jyOScAh

[Open Knowledge Graphs @OpenKGraphs]

📦 Software Release: LinkedDataHub 6.1.0

LinkedDataHub helps teams build apps around linked data. This release fixes conflicting concurrent edits and restoring earlier document versions.

From @atomgraphhq

https://t.co/LLcQ5rwRul

[Open Knowledge Graphs @OpenKGraphs]

📦 Software Release: ArcadeDB 26.10.1

ArcadeDB is an open-source database for graph, document and vector data. This release addresses cluster recovery, lost updates and security issues.

From @arcade_db

https://t.co/XyO8WhDafZ

[Open Knowledge Graphs @OpenKGraphs]

🔎 Open-Source Spotlight: WIDOCO

For projects publishing an ontology, WIDOCO generates HTML documentation from its terms and annotations, with diagrams and changelogs to help readers understand the model.

Built by @dgarijov and contributors

https://t.co/kTTUjfmydE

[Open Knowledge Graphs @OpenKGraphs]

🔎 Open-Source Spotlight: Ontospy

For projects that need to understand or document an ontology, Ontospy lets you inspect RDF models in Python or the command line and generate HTML documentation.

Built by Michele Pasin and contributors

https://t.co/UyQbtyNtJm

[Open Knowledge Graphs @OpenKGraphs]

🔎 Open-Source Spotlight: RDF Sketch

RDF Sketch from @zazukocom lets you edit RDF in your browser and visualize, search, and explore the graph—useful for inspecting data or explaining its structure.

https://t.co/7D0brllFD8

#KnowledgeGraphs #LinkedData

[Open Knowledge Graphs @OpenKGraphs]

🔎 Open-Source Spotlight: Prez

For projects that need to share RDF data with applications, Prez provides a configurable Linked Data API with readable labels. Recent updates add Jena Lucene-backed search.

https://t.co/Q5DsYEaWVN

[Open Knowledge Graphs @OpenKGraphs]

🎬 Who made this shot, using which assets?

The MovieLabs Ontology for Media Creation connects people, tasks and assets—giving film and TV production tools a shared language.

https://t.co/jWFKLhYBwv

#Ontologies #Filmmaking

[Open Knowledge Graphs @OpenKGraphs]

🧭 Where did this data come from—and who changed it?

PROV-O connects data, the activities that produced it, and the people or software responsible, helping you trace its history across systems.

https://t.co/7T8spCl36r

#KnowledgeGraphs #LinkedData

[Open Knowledge Graphs @OpenKGraphs]

🔎 Missing names? Dates stored as text? Too many values where you expected one?

SHACL lets you define rules for RDF data and check your graph against them—catching problems before they reach your applications.

https://t.co/qnYxVidhZ9

#KnowledgeGraphs #DataQuality #SHACL

[Open Knowledge Graphs @OpenKGraphs]

🧩 Working with RDF in JavaScript? N3.js 2.8.0 lets you choose whether matched data stays a fixed snapshot or tracks changes in the underlying store—useful when your graph keeps changing.

https://t.co/9EJc1jkfwT

#LinkedData #JavaScript