Semantic Web Python Packages

rdflib

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

extruct

Extract embedded metadata from HTML markup

curies

🐸 Idiomatic conversion between URIs and compact URIs (CURIEs) in Python

pyld

JSON-LD processor written in Python

pronto

A Python frontend to (Open Biomedical) Ontologies.

sssom-pydantic

🐍 An opinionated implementation of a simple subset of SSSOM, based on Pydantic

ramose

RAMOSE is an application for creating REST APIs on top of SPARQL endpoints

pyjelly

Fast RDF serialization for Python

ssslm

A simple standard for sharing literal mappings (SSSLM)

orionbelt-ontology-builder

Browser-based ontology workbench for OWL ontologies and SKOS vocabularies. Streamlit + rdflib, no Java, no Protégé. Bulk operations, OWL-RL reasoning, gist upper-ontology starters, merge-aware imports, interactive vis-network graph.

ontobio

python library for working with ontologies and ontology associations

obographs

A Pydantic model for OBO Graph JSON

curies-processing

Pre- and post-processing configuration for prefixes, CURIEs, and URIs

linkml-model

Link Modeling Language (LinkML) model

rdfpandas

RdfPandas is a module providing RDF support for Pandas

lightrdf

A fast and lightweight Python RDF parser which wraps bindings to Rust's Rio using PyO3

purrdf

PurRDF — one RDF 1.2 engine, one behavior, every language: interned primitives, Turtle/TriG/N-Quads/RDF-XML/JSON-LD codecs, RDFC-1.0, SPARQL 1.1/1.2, SHACL Core, GTS graph transport, and Python/WebAssembly/C bindings.

sparqltransformer

Python version of SPARQL Transformer

web-algebra

Suite of generic Linked Data/SPARQL as well as LinkedDataHub-specific MCP tools

ontoink

Interactive ontology visualization, SHACL validation, and live TTL editing plugin for MkDocs. Publication-ready diagrams with formal notation.

ccx-format

Reference reader + writer for CCX (Chaos Cypher eXchange): the open, JSON-LD-native, source-backed knowledge-graph package format. pip install ccx-format

travshacl

A SHACL validator capable of planning the traversal and execution of the validation of a shape schema to detect violations early.

cso-classifier

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

cow-csvw

Integrated CSV to RDF converter, using CSVW and nanopublications