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Awesome Semantic Web Awesome

A curated list of various semantic web and linked data resources.

Contents

Standards

RDF

RDFS

OWL

SHACL

ShEx

SPARQL

RDFa

Tabular

Linked Data Fragments (LDF)

Open Services for Lifecycle Collaboration (OSLC)

Web Annotation Data Model

Linked Data Notifications

Linked Data Platform

Data Cube extensions

Serialization

Format Description Mime-type
Turtle Terse RDF Triple Language. text/turtle, application/x-turtle
TriG Plain text format for serializing named graphs and RDF Datasets. application/trig, application/x-trig
JSON-LD JSON-based Serialization for Linked Data. application/ld+json
RDF/JSON RDF 1.1 JSON Alternate Serialization. application/rdf+json
N-Triples Line-based syntax for RDF datasets. application/n-triples
N-Quads Line-based syntax for RDF datasets. application/n-quads, text/x-nquads, text/nquads
Notation3 Notation3 (N3): A readable RDF syntax. text/n3, text/rdf+n3
RDF/XML RDF/XML Syntax Specification. application/rdf+xml, application/xml
TriX RDF Triples in XML. application/trix
HDT Binary RDF Representation for Publication and Exchange. application/x-binary-rdf
aREF Another RDF Encoding Form.

Companies

Databases

$ - Proprietary
OS - OpenSource
F - Free

Academic

Ecosystem

Conferences

Blogs

Podcasts

TODO

Meetups

TODO

Groups

Academic Journals

Research Institutions

Follow

Knowledge Graph Management

$ - Proprietary
OS - OpenSource

  • Metaphacts - ($) End-to-end platform to create and utilize enterprise knowledge graphs.
  • OntoWiki - (OS) Semantic data wiki as well as Linked Data publishing engine.
  • GNOSS-Sherlock - ($) Cognitive Intelligence tool for machines to understand us.

SPARQL Implementations

Streaming SPARQL

Federated SPARQL

ACTIVE

ARCHIVE - inactive projects or old academic projects that may lack soruce code

SPARQL Applications

Linked Data Platform (LDP)

  • fedora - Repository platform with native linked data support.
  • warp - Warp an LDP file manager.
  • Marmotta - Apache linked data platform implementation.
  • Elda - Linked data platform from Epimorphics.
  • LDP4j
  • gold - Linked Data server for Go.
  • CarbonLDP
  • trellis

Web Annotations

Mapping

Geo

Excel

CSV/Tabular

Object to RDF Mapping

RDB to RDF

  • d2rq - Database to RDF mapping engine and SPARQL server.
  • Sparqlify - Sparql -> SQL Rewriter enabling virtual RDB -> RDF mappings.
  • Sparqlify-Extendsions - Extension projects for Sparqlify.
  • quetzal - SPARQL to SQL translation engine for multiple backends, such as DB2, PostgreSQL and Apache Spark.

XML

  • ontmalizer - Comprehensive transformations of XML Schemas (XSD) and XML data to RDF/OWL automatically.

R2RML

  • R2RML-Parser - An R2RML implementation that can export relational database contents as RDF graphs.
  • Morph-RDB - An R2RML processor.
  • MusicBrainz-R2RML - R2RML mappings for the MusicBrainz schema.
  • ontop - Ontop is a platform to query relational databases as Virtual RDF Graphs using SPARQL. It's fast and is packed with features.
  • db2triples - Antidot implementations of R2RML and Direct Mapping specifications.
  • ADAPT-R2RML
  • R2RML-api
  • R2RML-kit
  • Juma - Juma, jigsaw puzzles for representing mapping, is a method that applies the block metaphor to mapping languages.
  • pyrdb2rdf - A Python library for RDB2RDF Direct Mapping and R2RML.
  • sparqlmap
  • rdf2rml - R2RML Generation from simple examples.
  • ultrawrap
xR2RML
R2RML-f

RML

  • RML - RDF Mapping language for mapping JSON, CSV and XML to RDF.
  • CARML - CARML RML engine for mapping CSV, XML and JSON files to RDF

Other RDF Mappings

Ontologies

World Wide Web Consortium (W3C)

  • WGS84 - Basic Geo (WGS84 lat/long) Vocabulary.
  • skos - SKOS Simple Knowledge Organization System.
  • skos-xl - SKOS Simple Knowledge Organization System eXtension for Labels.
  • vcard - vCard Ontology - for describing People and Organizations.
  • void - Describing Linked Datasets with the VoID Vocabulary.
  • time - Time Ontology in OWL.
  • org - The Organization Ontology.
  • data-cube - The RDF Data Cube Vocabulary.
  • pim
  • dqv - Vocabulary for describing quality metadata.
  • PROV-O - Represent provenance information.

Common

  • foaf - Friend of a Friend (FOAF) ontology.

Community

  • uberon - Integrated cross-species ontology covering anatomical structures in animals.
  • juso-ontology - Vocabulary for describing geographical addresses and features.
  • obo-relations - Relation Ontology. Relationship types shared across multiple ontologies.
  • orderedlistonto - The Ordered List Ontology.
  • evidenceontology - EVIDENCE & CONCLUSION ONTOLOGY.
  • bevon - Beverage ontology.
  • cyber-ontology - Cyber Intelligence Ontology.
  • doap - RDF schema for describing software projects.
  • qb4olap - A Vocabulary for Business Intelligence over Linked Data.
  • Hydra - A lightweight vocabulary for hypermedia-driven Web APIs.
  • vocab-transit - RDF Schema for transit data.
  • ssso - Specification of Simple Service Status Ontology.
  • dso - Specification of Document Service Ontology.
  • schema.org - Structured data on the Internet (Google, Microsoft, Yahoo and Yandex).
  • SPAR - Semantic Publishing and Referencing Ontologies.
  • BFO - Basic Formal Ontology.
  • VIVO ISF - Researchers and the full context in which they work.

Educational

  • MMOntologies - Multimedia ontologies studied for the paper "The Landscape of Multimedia Ontologies in the last Decade".
  • Wine - Wine Ontology is a popular example of an OWL ontology.
  • Pizza - A step-by-step guide to modelling in OWL using the popular Protégé OWL tools.

Books

Ontology Development

  • protégé - Ontology editor and framework for building intelligent systems.
  • OntoVerbal - OntoVerbal is a Protege 4.2 plugin that generates natural language descriptions for classes for an ontology written in OWL.

Reasoners

Benchmarks

Programming

Java

Python

  • RDFlib - Pythonic RDF API.
  • SPARQLWrapper - A wrapper for a remote SPARQL endpoint.
  • sparql-client - Python API to query a SPARQL endpoint.
  • RdfAlchemy
  • Fuxi - Bi-directional logical reasoning system for the semantic web.
  • pySHACL - A Python validator for SHACL.
  • PyShEx - ShEx interpreter for ShEx 2.0.
  • ORDF
  • Django-rdf - An RDF engine for Django projects.
  • Djubby - Linked Data frontend for SPARQL endpoints for Django.
  • SuRF
  • sparta - Simple API for RDF.
  • rdftools - Simple collection of python RDF tools.
  • cysparql - CySparql is a python wrapper over the excellent rasqal RDF library for parsing SPARQL queries.

C

  • serd - Lightweight C library for RDF syntax.
  • librdf - Redland librdf RDF API and triple stores.
  • raptor - Redland Raptor RDF syntax library.
  • rasqal - Redland Rasqal RDF Query Library.

JavaScript

  • js3
  • rdfstore-js
  • rdf-ext
  • N3.js
  • Jessa
  • RDFJS - Github Organization that maintains modern JavaScript RDF libraries based on open, maintained standards
  • rdf.js
  • rdflib.js - Linked Data API for JavaScript.
  • sparks - Sparks is a set of JavaScript libraries designed for simplifying the access to RDF data.
  • SPARQL.js - A parser for the SPARQL query language in JavaScript.
  • sparqlalgebrajs - SPARQL to SPARQL Algebra converter.
  • RDForms - Construct form-based RDF editors in a web environment.

C#

Go-Lang

PHP

Clojure

  • grafter - Linked Data & RDF Manufacturing Tools in Clojure.
  • kr - Clojure API for RDF and SPARQL - provides consistent access to APIs including Jena and Sesame.
  • clj-plaza - Clojure rdf framework.
  • seabass - A library for working with RDF with Jena in Clojure.

Scala

  • banana-rdf - A library for RDF, SPARQL and Linked Data technologies in Scala.
  • jvmrdftools
  • SANSA-RDF - Library to read RDF files into Spark or Flink.

Groovy

R

Ruby

Swift

ObjectiveC

  • SPARQLKit - An implementation of the SPARQL 1.1 query language in Objective-C.

Prolog

Perl

Haskell

OCamel

  • ocaml-rdf - Manipulate RDF graphs and execute Sparql queries.

Editors

VIM

Emacs

IntelliJ

  • sparql4idea - SPARQL language plugin for IntelliJ IDEA.

Geo

Visualization

Data Cube

Datasets

  • DBpedia
  • geonames
  • permid - PermID: Connecting Data to the World.
  • wikidata - Wikidata is a free and open knowledge base that can be read and edited by both humans and machines.
  • lod-cloud - The Linked Open Data Cloud.

IoT

DevOps

  • r43ples - Revision Management for the Semantic Web.
  • RDFUnit - RDF Unit testing and validation framework.
  • rdf-toolkit - RDF Serializer, to be used in a git commit-hook to force automatic correct rewrite of every OWL ontology.
  • TripleChecker - Look for common errors in an RDF Document.
  • owl2vcs - owl2vcs is a set of tools designed to facilitate version control of OWL 2 ontologies using version control systems.
  • dowl - Generate docs for RDF/OWL Schema.
  • rdf-pipeline
  • rdfpatch
  • TurtleValidator - A Turtle validator on command line and in browser.
  • shi3ld-http - Shi3ld for HTTP: Access control for HTTP operations on Linked Data.
  • babel - A library for skolemising (or canonicalising) blank node labels in RDF graphs.
  • rdf.sh - A multi-tool shell script for doing Semantic Web jobs on the command line.
  • QuitStore - Quads in Git - Distributed Version Control for RDF Knowledge Bases.
  • QuitDiff - Git diff into SparQL / Eccrev vocabulary.

Platforms

  • trinity - An application development platform for Microsoft .NET and Mono. It allows to easily build Linked Data and Semantic Web applications based on RDF.
  • Wings - A workflow system.
  • rww-play - An implementation in Play of a number of tools to build a Read-Write-Web server using Play2.x and akka.
  • prissma-studio - PRISSMA Studio: a web application to create Prisms, context-aware presentation metadata for Linked Data visualization.
  • lodspeakr - Framework to create Linked Data-based applications.
  • comunica - Flexible meta query engine for the Web.
  • imagesnippets - ImageSnippets is a complete metadata editing interface that enables someone who knows little to nothing about RDF, OWL, ontologies, or even URIs to create descriptions for images using Linked Data which is written in RDF.

Tools

  • tawny-owl - Build OWL Ontologies in a Programmatic Environment.
  • Widoco
  • sesame-vocab-builder - Sesame Vocab Builder provides a command line tool that allows to create constants for RDF primitives for a given namespace out of RDF ontology files.
  • HydraConsole
  • qonsole - A simple console for running SPARQL queries and displaying results.
  • ntcat - Command line tool for concatenating NTriples documents.
  • ripple - Semantic Web scripting language.
  • schema_salad - Semantic Annotations for Linked Avro Data.
  • RDFConvert - RDFConvert is a simple command-line tool for converting RDF file betweeen different syntax formats.
  • How to diff RDF
  • grlc - Web APIs from SPARQL queries.
  • Openlink Structured Data Sniffer - Browser extension for Google Chrome, Microsoft Edge, Mozilla Firefox, Opera, and Vivaldi that unveils structured metadata embedded within HTML documents and web pages.
  • ShacShifter - Shapes Constraint Language (SHACL) to various other format.

Integrations

  • anthelion - A plugin for Apache Nutch to crawl semantic annotations within HTML pages.
  • SolRDF - An RDF plugin for Solr.
  • sesame-spring - Spring integration for OpenRDF/Sesame.
  • HydraBundle - Symfony2 bundle which shows how easily Hydra can be integrated in modern Web frameworks.
  • SARQ - Free Text Indexing for SPARQL using a remote Solr server.
  • EARQ - EARQ is a combination of ARQ and ElasticSearch.
  • sesametools - A collection of utilities for use with OpenRDF Sesame.
  • Imperium - Imperium is a plugin for the Play! framework similar to the existing JPA plugin that allows the use of Empire seamlessly in a Play! based application.
  • jekyll-rdf - A Jekyll plugin for including RDF data in your static site.
  • RightField - RightField is an open-source tool for adding ontology term selection to Excel spreadsheets.

Machine Learning

  • LinkedPipes-ETL - Linked Data ETL pipeline.
  • gm-sparql - Graph Mining Using SPARQL.
  • SANSA-Stack - Scalable Semantic Analytics Stack.
  • tdbloader4 - Prototype to show how TDB indexes can be generated using MapReduce.
  • jena-grande - Jena Grande is a collection of utilities, experiments and examples on how to use MapReduce, Pig, HBase or Giraph to process data in RDF format.
  • mrlin - MapReduce processing of Linked Data.
  • infovore - RDF-Centric Map/Reduce Framework and Freebase data conversion tool.
  • FOX - Federated Knowledge Extraction Framework.
  • singal-collect
  • Duke - Duke is a fast and flexible deduplication engine written in Java.
  • ODCS - The tool uses data processing pipelines for obtaining, processing, and storing RDF data.
  • etalis - Event Processing SPARQL (EP-SPARQL).
  • graph-pattern-learner - Evolutionary Graph Pattern Learner that learns SPARQL queries for a given set of source-target-pairs from an endpoint.

WebID

Misc