An open API service indexing awesome lists of open source software.

Semantic Web

The Semantic Web is an extension of the World Wide Web through standards set by the World Wide Web Consortium (W3C). The goal of the Semantic Web is to make Internet data machine-readable.

This can be seen in various aspects of web development, one being semantic HTML as a way to give your markup meaning, microformats like schema.org or linked-data like json-ld. Another aspect is from the opposite perspective: Reading and interpreting data. This can be done with metadata via RDF.

https://github.com/knadh/oat

Ultra-lightweight, zero dependency, semantic HTML, CSS, JS UI library. ~8KB min+gz.

component-library css css-framework dashboard-design semantic-html semantic-web ui-components ui-design web-ui web-ui-framework webcomponents

Last synced: 06 Mar 2026

https://github.com/rdflib/rdflib

RDFLib is a Python library for working with RDF, a simple yet powerful language for representing information.

graph json-ld linked-data n3 namespace nquads ntriples parser pypi python python-library rdf rdf-xml rdflib semantic-web serializer sparql turtle turtle-rdf uri

Last synced: 13 Feb 2026

https://github.com/RDFLib/rdflib

RDFLib is a Python library for working with RDF, a simple yet powerful language for representing information.

graph json-ld linked-data n3 namespace nquads ntriples parser pypi python python-library rdf rdf-xml rdflib semantic-web serializer sparql turtle turtle-rdf uri

Last synced: 01 Apr 2025

https://github.com/lowlighter/matcha

🍵 Drop-in semantic styling library in pure CSS. Highly customizable and perfect for simple websites and prototyping web apps!

classless classless-css css css-framework design minimalist semantic-web simple theme web

Last synced: 14 May 2025

https://github.com/digitalbazaar/jsonld.js

A JSON-LD Processor and API implementation in JavaScript

javascript json-ld linked-data rdf semantic-web

Last synced: 14 May 2025

https://github.com/brettkromkamp/contextualise

Contextualise is an effective tool particularly suited for organising information-heavy projects and activities consisting of unstructured and widely diverse data and information resources

commonplace-book flask-application htmx investigative-journalism knowledge-graph knowledge-management-graph metamodel python python3 research-tool semantic-web sqlite-database

Last synced: 14 May 2025

https://github.com/scrapinghub/extruct

Extract embedded metadata from HTML markup

hacktoberfest json-ld microdata microformats opengraph rdfa semantic-web

Last synced: 13 May 2025

https://github.com/dbpedia-spotlight/dbpedia-spotlight

DBpedia Spotlight is a tool for automatically annotating mentions of DBpedia resources in text.

content-tagging dbpedia-spotlight entity-extraction entity-linking nlp rdfa-annotation semantic-web text-annotation

Last synced: 10 May 2025

https://github.com/sourcenetwork/defradb

DefraDB is a Peer-to-Peer Edge Database. It's the core data storage system for the Source Network Ecosystem, built with IPLD, LibP2P, CRDTs, and Semantic open web properties.

crdt database distributed documentdb edge-compute graphql linked-data local-first-software nosql peer-to-peer semantic-web

Last synced: 12 Jan 2026

https://github.com/digitalbazaar/pyld

JSON-LD processor written in Python

json-ld linked-data python rdf semantic-web

Last synced: 15 May 2025

https://github.com/pysemtec/semantic-python-overview

(subjective) overview of projects which are related both to python and semantic technologies (RDF, OWL, Reasoning, ...)

collection community-driven datalog knowledge-graph ontology owl python rdf semantic-web semantics sparql swrl

Last synced: 16 Nov 2025

https://github.com/google/react-schemaorg

Type-checked Schema.org JSON-LD for React

json-ld jsonld react schema-org schemaorg semantic-web typescript

Last synced: 08 Apr 2025

https://github.com/ruby-rdf/rdf

RDF.rb is a pure-Ruby library for working with Resource Description Framework (RDF) data.

knowledge-graph linked-data rdf ruby semantic-web sparql

Last synced: 30 Dec 2025

https://github.com/eclipse-rdf4j/rdf4j

Eclipse RDF4J: scalable RDF for Java

hacktoberfest java linked-data rdf semantic-web shacl sparql

Last synced: 15 Jan 2026

https://github.com/davidesantangelo/api.rss

RSS as RESTful. This service allows you to transform RSS feed into an awesome API.

api bigdata dandelion-api elasticsearch feed machine-learning rails rest-api rss rss-feed ruby semantic-web sidekiq

Last synced: 20 Apr 2025

https://github.com/simongray/clojure-graph-resources

A curated list of Clojure resources for dealing with graph-like data.

clojure datalog graph-theory graphs neo4j owl rdf semantic-web triples

Last synced: 06 Apr 2025

https://github.com/sparql-anything/sparql.anything

SPARQL Anything is a system for Semantic Web re-engineering that allows users to ... query anything with SPARQL.

csv json knowledge-graph-construction linked-data rdf semantic-web sparql xml

Last synced: 08 Mar 2026

https://github.com/digitalbazaar/php-json-ld

PHP implementation of a JSON-LD Processor and API

json-ld linked-data php rdf semantic-web

Last synced: 12 Apr 2025

https://github.com/SPARQL-Anything/sparql.anything

SPARQL Anything is a system for Semantic Web re-engineering that allows users to ... query anything with SPARQL.

csv json knowledge-graph-construction linked-data rdf semantic-web sparql xml

Last synced: 11 May 2025

https://github.com/althonos/pronto

A Python frontend to (Open Biomedical) Ontologies.

bioinformatics obo obo-graphs obofoundry ontology owl parser python semantic-web

Last synced: 16 May 2025

https://github.com/Cognonto/kbpedia

KBPedia Knowledge Graph & Knowledge Ontology (KKO)

knowledge-graph ontology owl rdf semantic-web

Last synced: 03 Apr 2025

https://github.com/swirrl/grafter

Linked Data & RDF Manufacturing Tools in Clojure

clojure data etl grafter linked-data rdf semantic-web

Last synced: 04 Apr 2025

https://github.com/Swirrl/grafter

Linked Data & RDF Manufacturing Tools in Clojure

clojure data etl grafter linked-data rdf semantic-web

Last synced: 02 Apr 2025

https://github.com/callahantiff/pheknowlator

PheKnowLator: Heterogeneous Biomedical Knowledge Graphs and Benchmarks Constructed Under Alternative Semantic Models

benchmarks biolink-model biomedical-applications bioregistry hacktoberfest knowledge-graph linked-open-data mechanisms obofoundry ontologies owl semantic-web translational-research

Last synced: 05 Apr 2025

https://github.com/edent/tweet2embed

Convert a public Tweet into embedded semantic HTML

html python semantic-web twitter twitter-api

Last synced: 19 Oct 2025

https://github.com/hypergraphql/hypergraphql

GraphQL interface for querying and serving linked data on the Web.

graphql hypermedia-api json-ld linked-data query-language rdf schemas semantic-web sparql sparql-endpoints triplestore

Last synced: 03 Apr 2025

https://github.com/edent/Tweet2Embed

Convert a public Tweet into embedded semantic HTML

html python semantic-web twitter twitter-api

Last synced: 21 Mar 2025

https://github.com/linkedpipes/etl

LinkedPipes ETL is an RDF based, lightweight ETL tool

etl knowledge-graph linked-data linkedpipes rdf semantic-web

Last synced: 16 Nov 2025

https://github.com/gooofy/zamia-ai

Free and open source A.I. system based on Python, TensorFlow and Prolog.

artificial-intelligence knowledgebase natural-language-processing prolog python semantic-web tensorflow

Last synced: 14 Apr 2025

https://github.com/smartdataanalytics/dl-learner

A tool for supervised Machine Learning in OWL and Description Logics

machine-learning machine-learning-api machine-learning-library semantic-web web-ontology-language

Last synced: 10 Mar 2026

https://github.com/fogfish/datalog

simplified query engine based on logic programming paradigm

datalog erlang knowledge logic-programming semantic-web

Last synced: 07 May 2025

https://github.com/SANSA-Stack/SANSA-Stack

Big Data RDF Processing and Analytics Stack built on Apache Spark and Apache Jena http://sansa-stack.github.io/SANSA-Stack/

apache-jena apache-spark distributed-computing flink rdf semantic-web spark

Last synced: 09 Jul 2025

https://github.com/CLARIAH/grlc

grlc builds Web APIs using shared SPARQL queries

api linked-data linked-data-api open-api semantic-web sparql swagger-ui

Last synced: 16 Nov 2025

https://github.com/sansa-stack/sansa-stack

Big Data RDF Processing and Analytics Stack built on Apache Spark and Apache Jena http://sansa-stack.github.io/SANSA-Stack/

apache-jena apache-spark distributed-computing flink rdf semantic-web spark

Last synced: 04 Apr 2025

https://github.com/incatools/ontology-access-kit

Ontology Access Kit: A python library and command line application for working with ontologies

apis geneontology monarchinitiative oaklib obofoundry ontology ontology-api owl python rdf semantic-web

Last synced: 15 May 2025

https://github.com/clariah/grlc

grlc builds Web APIs using shared SPARQL queries

api linked-data linked-data-api open-api semantic-web sparql swagger-ui

Last synced: 06 Apr 2025

https://github.com/biolink/ontobio

python library for working with ontologies and ontology associations

bioinformatics gene-ontology graph obo obofoundry ontology ontology-tools python rdf semantic-web sparql

Last synced: 16 May 2025

https://github.com/wandora-team/wandora

Wandora is a general purpose information extraction, management and publishing application based on Topic Maps and Java.

information information-extraction information-systems information-visualization java knowledge knowledge-graph semantic semantic-web topic-extraction topic-map topicmaps wandora

Last synced: 16 Nov 2025

https://github.com/seebi/rdf.sh

A multi-tool shell script for doing Semantic Web jobs on the command line.

autocompletion ldp namespace pingback rdf rdf-files semantic-web shell syntax-highlighting turtle webid

Last synced: 05 Apr 2025

https://github.com/taurenshaman/semantic-web

Storing ontologies/vocabularies from the web. Wish anybody can translate some of them.

chuci ontology owl rdf semantic semantic-web turtle vocabulary web

Last synced: 10 Mar 2026

https://github.com/rubensworks/graphql-to-sparql.js

Converts GraphQL queries to SPARQL queries

graphql hacktoberfest linkeddata querying rdf semantic-web sparql

Last synced: 16 May 2025

https://github.com/rdf-elixir/rdf-ex

An implementation of RDF for Elixir

elixir graph knowledge-graph linked-data rdf semantic-web

Last synced: 16 May 2025

https://github.com/mdesalvo/rdfsharp

Lightweight and friendly .NET library for realizing Semantic Web applications

geosparql rdf semantic-web shacl sparql sparql-endpoints sparql-update triplestore

Last synced: 12 May 2025

https://github.com/carml/carml

A pretty sweet RML engine, for RDF.

linked-data r2rml r2rml-mapping rdf rml rml-mapping rml-spec semantic-web

Last synced: 11 Jan 2026

https://github.com/Wimmics/corese

Software platform implementing and extending the standards of the Semantic Web.

inria java rdf rdfs semantic-web shacl sparql sparql-client sparql-endpoints

Last synced: 02 Aug 2025

https://github.com/drobilla/serd

A lightweight C library for RDF syntax

nquads ntriples parser rdf semantic-web serializer turtle

Last synced: 11 Jan 2026

https://github.com/angelosalatino/cso-classifier

Python library that classifies content from scientific papers with the topics of the Computer Science Ontology (CSO).

computer-science-ontology cso-classifier cso-ontology cso-topics ontology-matching semantic-web text-classification text-processing word2vec-model

Last synced: 14 Jan 2026

https://github.com/the-qa-company/qEndpoint

A highly scalable RDF triple store with full-text and GeoSPARQL support

full-text-search geosparql graph-database java rdf semantic-web sparql triple-store wikidata

Last synced: 02 Aug 2025

https://github.com/obi-ontology/obi

The Ontology for Biomedical Investigations

bioinformatics obo obofoundry ontology owl semantic-web

Last synced: 11 Mar 2025

https://github.com/sparna-git/skos-play

SKOS-Play allows to print SKOS files in HTML or PDF. It also embeds xls2rdf to generate RDF from Excel.

d3js rdf semantic-web skos skos-play skos-xl sparql taxonomy thesaurus

Last synced: 13 May 2025

https://github.com/br41nlet/SchemaGPT

Python library for RDF Schemas generation from prompts using GPT-3 magic 🪄🪄🪄

gpt-3 knowledge-graph rdf schema-org semantic-web

Last synced: 20 Apr 2025

https://github.com/International-Data-Spaces-Association/InformationModel

The Information Model of the International Data Spaces implements the IDS reference architecture as an extensible, machine readable and technology independent data model.

industrial-data-space linked-data ontology owl rdf semantic-web

Last synced: 04 Apr 2025

https://github.com/ljos/sparql-mode

A SPARQL mode for emacs

emacs-lisp emacs-mode semantic-web sparql

Last synced: 11 Jan 2026

https://github.com/XIMDEX/xcms

Headless CMS with wysiwyg editor for XML and HTML5, omnichannel, multi-format and multi-platform decoupled publishing as html5, .net, j2ee, php, RoR, XML, json, RDF, epub, mobile apps, ... into the Cloud. Demo: http://demo.ximdex.com

cloud cms cms-framework content-management-system decoupled dms headless headless-cms html5 json-ld linked-data rdfa semantic-data semantic-web stanbol wysiwyg-editor ximdex xml xml-editor xslt

Last synced: 30 Mar 2025

https://github.com/ximdex/xcms

Headless CMS with wysiwyg editor for XML and HTML5, omnichannel, multi-format and multi-platform decoupled publishing as html5, .net, j2ee, php, RoR, XML, json, RDF, epub, mobile apps, ... into the Cloud. Demo: http://demo.ximdex.com

cloud cms cms-framework content-management-system decoupled dms headless headless-cms html5 json-ld linked-data rdfa semantic-data semantic-web stanbol wysiwyg-editor ximdex xml xml-editor xslt

Last synced: 02 Jul 2025

https://github.com/cheng-lin-li/market-trend-prediction

This is a project of build knowledge graph course. The project leverages historical stock price, and integrates social media listening from customers to predict market Trend On Dow Jones Industrial Average (DJIA).

djia dow-jones-industrial-average facebook facebook-crawler jupyter knowledge-graph knowledge-graph-course lstm market-trend-prediction prediction python rnn semantic-web social-media-mining twitter twitter-crawler web-crawler yahoo-finance-api

Last synced: 03 May 2025

https://github.com/cadmiumkitty/rdfpandas

RdfPandas is a module providing RDF support for Pandas

linked-data pandas rdf rdflib semantic-web

Last synced: 03 Apr 2025

https://github.com/atomgraph/csv2rdf

Streaming, transforming, SPARQL-based CSV to RDF converter. Apache license.

csv csv-converter csv2rdf docker-image knowledge-graph linked-data open-data rdf semantic-web sparql streaming transformation transformer

Last synced: 14 May 2025

https://github.com/ldbc/ldbc_snb_docs

Specification of the LDBC Social Network Benchmark suite

benchmarking graphs property-graph semantic-web snb

Last synced: 08 Jan 2026

https://github.com/inovexcorp/mobi

Mobi is a decentralized, federated, and distributed graph data platform for teams and communities to publish and discover data, data models, and analytics that are instantly consumable.

graph mobi ontology owl rdf semantic-web shacl sparql vocabulary

Last synced: 16 Feb 2026

https://github.com/owlcs/ont-api

ONT-API (OWL-API over Apache Jena)

jena ontapi owl owl-api rdf semantic-web

Last synced: 10 Feb 2026

https://github.com/clariah/cow

Integrated CSV to RDF converter, using CSVW and nanopublications

converters csv2rdf linked-data rdf semantic-web

Last synced: 21 Aug 2025

https://github.com/lisongx/wikidata-graphql

Wikidata + GraphQL (Dream API for everything)

api graphql semantic-web wikidata wikipedia

Last synced: 07 Apr 2025

https://github.com/amine1107/stylizer

Stylizer is a flexible Css framework based on the visual aspect, the framework offers you a clean and easy work.

css-framework css3 grid-layout responsive-web-design semantic-web

Last synced: 24 Apr 2025

https://github.com/amine1107/Stylizer

Stylizer is a flexible Css framework based on the visual aspect, the framework offers you a clean and easy work.

css-framework css3 grid-layout responsive-web-design semantic-web

Last synced: 14 Mar 2025

https://github.com/rdfostrich/ostrich

🐦 Versioned RDF triple store (OffSet-enabled TRIple store for CHangesets)

rdf semantic-web triplestore versioning

Last synced: 02 Apr 2025

https://github.com/dwslab/jrdf2vec

A high-performance Java Implementation of RDF2Vec

cli-app embeddings generating-walks knowledge-graph-embeddings rdf2vec semantic-web

Last synced: 14 Jan 2026

https://github.com/oscarotero/semantic-html

Collection of semantic HTML use cases

html html-markup html5 markup semantic-web

Last synced: 25 Jan 2026

https://github.com/linkeddata/contacts

Address book-like application to manage contact information.

decentralized linked-data rdf rww semantic-web solid solid-app

Last synced: 13 Feb 2026

https://github.com/frmichel/sparql-micro-service

SPARQL micro-services: A lightweight approach to query Web APIs with SPARQL

api-wrapper linked-data microservice microservices-architecture rdf semantic-web sparql web-of-data

Last synced: 17 Jan 2026

https://github.com/AI-team-UoA/GeoTriples

Publishing Big Geospatial data as Linked Open Geospatial Data

geospatial rdf semantic-web spark

Last synced: 03 Apr 2025