LDES at SEMANTiCS 2026: a monitoring platform and a construction-data streaming demo
LDES at SEMANTiCS 2026: monitoring data feeds with GRMP and sharing construction data through event streams.
What is LDES?
Linked Data Event Streams (LDES) is an open specification for publishing an append-only collection of immutable members as Linked Data. Members can describe events, observations, or successive versions of a record. Consumers can copy the available data, then follow new members as they are published.
Publish once. Support many uses.
Publisher provides a common source without having to build an API for every use case.
- Publish changes. Add new members instead of overwriting existing ones. Use shared RDF vocabularies to describe the data.
- Copy and follow. Clients traverse linked pages over HTTP and check for new members, reusing cached responses where possible.
- Build your own view. Maintain a local database, search index, or API, and process updates at your own pace.
LDES uses TREE links to let clients discover and navigate pages of members. Views can be fragmented by time or other properties; the stream itself is not necessarily delivered in chronological order. How far a client can go back depends on the publisher’s retention policy.
Developed in the SEMIC community, LDES gives publishers and consumers a shared contract for exchanging changing data. Read the specification →
An open specification.
Real-world adoption.
Supported by public institutions. Put to work by cities, museums, and research organisations. Discover the people turning shared data into reusable services.
Interoperable Europe
The main current funder and maintainer of LDES, through the European Commission programme for cross-border digital public services.
Discover the programme
Flanders
Supporting LDES through the OpenLDES community.
Explore the communityAlready putting LDES to work
Different domains. A shared way to publish and follow change.
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City of Ghent
Sharing the CoGhent heritage collections.
Explore CoGhent -
VLIZ
Connecting marine data through Linked Data.
Explore marine data -
Rijksmuseum
Making collection updates available to reusers.
Explore the collection -
EU Agency for Railways
Publishing catalog changes as an event stream.
Read the report
Find your way around
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LDES examples
Discover known LDES feeds and their sources — from museum collections to marine gazetteers.
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News and blog
Announcements, tutorials and deep dives — also available as an RSS feed.
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Community
Join the Matrix chat room, watch talks on our YouTube playlist, and meet the people building LDES.
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Tools
Open-source clients and servers for LDES, including RDF-Connect (JavaScript) and the OpenLDES ecosystem (Java).
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Specification
The LDES vocabulary, publishing requirements, and guidance for clients and servers.
Latest from the blog
RDF Messages reaches its first draft
A first draft dated 21 June 2026 explores a common foundation for exchanging RDF messages, with promising possibilities for future LDES work.
LDES 1.0 launches at SEMIC 2025
The SEMIC workshop in Copenhagen marks the launch of LDES 1.0 and brings together the people putting it into practice.