LibreOffice Conference 2026

Koji Annoura

Koji Annoura is a Knowledge Graph architect and open-source community leader based in Japan.

He works with graph technologies, structured knowledge, open standards, and AI systems. His recent interests include Knowledge Graphs, GraphRAG, Neo4j, Cypher, GQL, SQL/PGQ, and how reliable knowledge can be maintained in open and traceable formats.

Koji co-founded the Neo4j Users Group Tokyo in 2013 and founded the Apache Hop User Group Japan in 2021. He has organized more than 50 technical community events and has spoken at international open-source conferences including FOSSASIA, COSCUP, and LibreOffice Conference.

He focuses on building knowledge systems that connect data, documents, tools, and communities in a sustainable way.


Session

09-11
14:00
30min
Mapping the Evolution of ODF with LibreOffice: Versions, Applications, Interoperability, and Structured Knowledge
Koji Annoura

ODF is an important open standard for office documents. It helps people and organizations keep access to their documents over a long time, and it allows different applications to work with the same document formats. This is especially important when documents must remain usable across many years, systems, and organizations.

Still, the history and current state of ODF are not always easy to understand. Each ODF version has added or changed features. Each application supports different versions and features. Some tools can read or write ODF files directly, while others can work with ODF data through data-processing workflows. As a result, useful knowledge about ODF is often spread across many places.

In this session, Koji Annoura will show a way to manage this knowledge using LibreOffice itself. The main example will be ODF versions, ODF-compatible applications, related tools, and interoperability. The session will also be a case study in a more general method: collecting information, checking sources, structuring data, and keeping the result in a form that can be maintained with LibreOffice and ODF.

e) Open Document Format, Digital Sovereignty and Interoperability
Track Room 1