OUDEA v0.1
The public specification for decentralized discovery and governed exchange across independent systems. Published under CC BY-ND 4.0.
Read specification →The implementation
bytEM
A federated implementation of the OUDEA data exchange architecture.
Explore the first public index, review deployment instructions and learn how to cooperate on the privately maintained core.
The public launch01 · Architecture 02 · Deployment 03 · Implementation
One architecture. One installer. One live implementation.
bytEM installer
Public installer repository under AGPL-3.0, including Matrix Synapse. See repository instructions for deployment requirements.
View installer →cities.app
The first public bytEM instance and first live data vertical. Explore indexed data sources.
Open index →How the architecture works
Making data interoperable across the Internet.
OUDEA defines a common architecture through which independently governed data entities can be identified, discovered, referenced and exchanged across systems and organisational boundaries — without requiring a central data platform.
INDEXDiscover data entities
REFERENCESConnect related entities
FINDResolve current access
EXCHANGETransfer governed data
When an identifier is not yet known, the normal operational path is Search → Find → Exchange. References enable relationship navigation.
Explore the OUDEA specification →Source access and licensing
Clear separation of the public installer and the core.
The bytEM installer is publicly available under AGPL-3.0 and includes Matrix Synapse. The independently developed bytEM core remains in a private repository under an Apache 2.0 licensing model. Source-code access can be requested under a cooperation agreement. A broader open-source release is planned for a later date.
Data indexesLive · Public Cooperation access Cooperation access
Experience a working vertical.
Begin with cities.app. Other domain indexes are available through cooperation rather than unrestricted public access.
cities.app
Explore the first public bytEM index.
Explore cities.app ↗environment.app
Environmental and water-related data services.
legalentities.app
Entity records and interconnected legal-entity data.
Cooperation
Build with us.
Explore deployment, source-code cooperation, research partnerships and access to additional data indexes.