SODIC – Semantic & Open Data Innovation Chemnitz

Fostering transparency, interoperability, and innovation in the Open Data ecosystem

Motivation & Vision

In a world increasingly driven by data, the accessibility, semantics, and interoperability of Open Data are more important than ever. SODIC stands at the intersection of technology, governance, and transparency – pushing for intelligent Open Data infrastructures that empower society, science, and administration.

Team

Florian Hahn ORCID

Researcher in Semantic Open Data, Web Technologies & Public Data Infrastructures

Prof. Dr. Michael Martin ORCID

Professor of Data Management – Expert in Linked Data, Semantics, and Data Architectures

Current Research

SODREPO - Spatial Open Data Regions and Portals

An interactive map-based tool linking Open Data portals to administrative boundaries across Europe. Introduced at ICEGOV 2025, SODREPO brings spatial context and metadata richness to the Open Data infrastructure landscape. Current demonstration is here: SODREPO

SODINA - Sparql for Open Data Introspection, Navigation and Access

SODINA is a lightweight introspection layer for SPARQL endpoints, designed to support semantic data exploration by dynamically exposing available classes, properties, datatypes, and value samples. Inspired by GraphQL’s `__schema` functionality, SODINA lowers the entry barrier for users unfamiliar with the internal vocabulary of RDF-based Open Data portals.

SODMET (old SODRAM) - Semantic Open Data Metadata Extration Tools (old Specific Open Dataset Regional Analysis Metadata)

This Node.js-based research tool analyzes the metadata quality of German municipal Open Data portals. Specifically, it evaluates the **regional assignability** of datasets depending on whether standardized metadata models like **DCAT-AP** and **GeoDCAT-AP** are used (typically via CKAN), best practice as a SPARQL endpoint, or non-standard formats (e.g. ArcGIS JSON).

SODBond - Semantic-Orchestration Derivation Bond between BPMN and RDF

SODBond is a toolkit that bridges Camunda BPMN 2.0 process definitions and runtime instances with RDF knowledge graphs via an ontology-driven approach. It retrieves BPMN models and instance data from Camunda through the REST API and transforms them into semantically rich RDF/OWL representations based on a BPMN-based ontology.

SODPEST (SPARQL Open Data Portal Endpoint SPARQL Tester)

SODPEST is a small, dependency-light CLI tool that derives SPARQL endpoint candidates for Open Data portals and optionally verifies them via real SPARQL protocol checks.

SODDUT (Semantic Open Data Dataset Update Timeline)

SODDUT ist an interactive timeline to check the corresponding creation and updating process of an Open Data Dataset.

Completed Projects

Planned Projects

Publications

Research Topics