software for the comparison and evaluation of ontologies and knowledge graphs
horizontally distributed, multi-model (document and graph), entity-event knowledge graph database system
open source headless CMS / real-time database. Powerful table editor, full-text search, and SDKs for JS / React / Svelte
Blazegraph High Performance Graph Database
CM-Well - a data warehouse for your knowledge graph
fork of CQELS (Continuous Query Evaluation over Linked Data)
Tool to transform an ontology diagram into OWL code.
Software platform implementing and extending the standards of the Semantic Web.
Cost-Based Query Optimization for SPARQL Endpoint Federation
RDF store on a cloud-based architecture (previously on https://code.google.com/p/cumulusrdf)
DBpedia Archivo - Augmented Ontology Archive powered by Databus
Library for representing and working with ontologies in Python
Excel-to-RDF converter. It can generate RDF files from Excel spreadsheets structured in a specific way, and contains specific features for SKOS
Code for FOOPS! the OEG FAIR ontologies validator
FAIRsFAIR Research Data Object Assessment Service
open source semantic rule-based system for knowledge representation and reasoning
Fluent query API for SPARQL based on the Jena framework
Data, and its history, via change requests
Extension of the rdf3x engine and the translatesparql tool
Web extension that captures Web navigation traces and transforms them into a RDF graph for further exploration
Halyard is an extremely horizontally scalable Triplestore with support for Named Graphs, designed for integration of extremely large Semantic Data Models, and for storage and SPARQL 1.1 querying of the whole Linked Data universe snapshots.
HeFQUIN is a query federation engine for heterogeneous federations of graph data sources, including federations of knowledge graphs.
Semantic reasoner, usable as cli, api, or plugin
ImageSnippets is a fully operational web application for creating precise image descriptions/annotations using linked data
JDBC driver that takes data from SPARQL endpoints or RDF graphs
persistent RDF quadstore and SPARQL engine
Graph database JS style for Node.js and the Browser. Built upon LevelUp and LevelDB.
flexible modeling framework that allow for working with semantic web standards alongside a modern data stack
The low-code Knowledge Graph application platform. Apache license.
LinkedPipes ETL is an RDF based, lightweight ETL tool
LogMap: An Ontology Alignment and Alignment Repair System
Calculate (evolutional) ontology metrics using a GUI or API
Russian high-performance multi-model database system
LevelDB-backed graph database engine for Node.js and the browser supporting SPARQL queries and the RDF/JS interface
This project is a FAIRness assessment tool for ontologies, vocabularies and semantic resources.
Online tool to automatically generate documentation and evaluation for Ontologies hosted on GitHub
Python library and command-line interface for inspecting and visualizing RDF models aka ontologies.
Extract ontology terms and axioms: http://ontofox.hegroup.org
OntopSpark is an Ontop's extension which supports Apache Spark as query processing engine. The Ontop platform allows to query relational databases as Virtual RDF Knowledge Graphs using SPARQL.
A highly efficient and robust graph database system with RDF and SPARQL support
🐦 Versioned RDF triple store (OffSet-enabled TRIple store for CHangesets)
Owlready2 is a package for ontology-oriented programming in Python
Standards-compliant triple store for RDF, OWL, and SPARQL
Pellet is an OWL 2 reasoner in Java; open source (AGPL) and commercially licensed, commercial support available.
Ontology-driven Linked Data processor and server for SPARQL backends. Apache License.
Linked Data frontend for SPARQL endpoints
🖧 Quads in Git - Distributed Version Control for RDF Knowledge Bases
RDFLib is a Python library for working with RDF, a simple yet powerful language for representing information.
web interface for Linked Data courses, tailored for CC7220 \
RIQ is a new software tool for fast processing of SPARQL queries on RDF quadruples. (Funding source: National Science Foundation Grant Nos. 1115871 and 1620023)
high-level tool for working with OBO ontologies
RSP4J a library for RDF Stream Processing
Radar Station: Using Knowledge Graph Embeddings for Semantic Table Interpretation (row, column, and relationships between columns annotations) and Entity Disambiguation
Reactive Sparql Client written in Scala and Akka
JavaScript library for visual interaction with graph data in a form of a diagram
RedStore is a lightweight RDF triplestore written in C using the Redland library.
4store is an efficient, scalable and stable RDF database.
big data RDF processing and analytics stack built on Apache Spark and Apache Jena
Get notifications about changes in your SPARQL endpoint.
Free online SHACL tool suite : RDF data validation, documentation generation, and more.
SHACTOR: Improving the Quality of Large-Scale Knowledge Graphs with Validating Shapes
SKOS Play! is a free application to render and visualise thesaurus, taxonomies or controlled vocabularies expressed in SKOS. SKOS Play! also provides a way to convert Excel spreadsheets to SKOS files.
Semantic Web stream processing solution with declarative data mapping capability based on a modified version of the RMLMapper-java tool and extensions to the StreamingMASSIF framework
a ajaxy front-end for exploring triple stores
Easily store and curate SPARQL queries (and their associated Linked Data APIs) in GitHub
converts SPARQL queries to natural language expressions
Using Blockly library for building SPARQL queries with blocks.
Expand SPARQL queries to perform inference on multiple endpoints and relational databases.
SPARQL Anything is a system for Semantic Web re-engineering that allows users to ... query anything with SPARQL.
Sampo-UI is a framework for developing user interfaces for semantic portals to publish Linked Open Data.
SPARQL query federator of heterogeneous data sources
XQuery and Java tools for working with semantic tuples stored in MarkLogic Server
Tesi triennale Alberto Zerbinati, Simone Mosco. Relatore prof. Andrea Loreggia. @unipd
natural-language SPARQL query builder software
visual knowledge graph explorer with SPARQL, in the browser, configurable with SHACL
Java based middleware/proxy framework for live analysis of SPARQL queries. Publish live SPARQL endpoint metrics using embeddable HTML/JavaScript widgets.
Browse the content of a SPARQL endpoint using hypertext links and without writing queries.
more handy way to use SPARQL data in your web app
Squebi provides an extendable SPARQL interface.
Stardog is a commercial RDF database engine with support for SPARQL querying and OWL reasoning
Cascading Stream Reasoning with Streaming MASSIF
Cross-server SPARQL query library with support for incremental, streaming result processing.
TableAnnotation is a semantic annotation tool for tables leveraging three steps: table preprocessing, entity lookup and annotation (Cell-Entity Annotation, Column-Type Annotation, Column-Pair Annotation)
semantic table annotation tool that leverages Wikidata and language model architectures
TripleWave is a framework to publish RDF streams on the Web.
Virtuoso is a high-performance and scalable Multi-Model RDBMS, Data Integration Middleware, Linked Data Deployment, and HTTP Application Server Platform
Nifty library to manage, query and store RDF triples. Make RDF great again!
Wizard for documenting ontologies. WIDOCO is a step by step generator of HTML templates with the documentation of your ontology. It uses the LODE environment to create part of the template.
adaptive query processing engine for SPARQL endpoints
general-purpose data processing software for the Semantic Web
Query a SPARQL endpoint with a SELECT query and get the data ready to be used with d3js
JavaScript library for executing SPARQL query and transforming resulted JSON for visualization in D3.js
triplestore software library written in Golang
Fluree’s platform enables trusted, linked, and composable data
gStore - a graph based RDF triple store.
JSON Resource Query Language, for simple, consistent query APIs
Tools to update and export ontology RDF.
platform to query relational databases as Virtual RDF Knowledge Graphs using SPARQL
OntopStream is a research protype extension of the popular Ontology-Based Data Access engine Ontop.
python List of Dict (Table) Storage library
RDF by Example: rdfpuml for True RDF Diagrams, rdf2rml for R2RML Generation
RDF-Ext is a JavaScript library that extends the RDF/JS specs to handle RDF data in a developer-friendly way.
Sketch RDF in the web browser with immediate visualization
SAFE: SPARQL Federation over RDF DataCubes with Access Control
A "Kafka to SPARQL gateway" standalone piece of software enabling end-to-end Semantic Web data flow architecture with a Semantic Service Bus (SSB) approach.
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