Recording Available Now: Introducing the SI Reference Point (SIRP)
As metrology continues its digital transformation, ensuring that the International System of Units (SI) can be understood and used consistently by both people and machines has become increasingly important.
Held on 20 July 2026, a webinar Introducing the SI Reference Point (SIRP) explored how the SI Reference Point provides a machine-actionable knowledge model of the SI Brochure, supporting the consistent use of the SI in digital applications, data exchange and emerging digital metrology services.
Speakers include Dr Cornelia Denz (PTB), Dr Frédéric Meynadier (BIPM), Dr Jean-Laurent Hippolyte (NPL), and moderation and Q&A hosted by Cristhian Paredes (BIPM)
Watch the full webinar recording on YouTube.
Learn more about Version 1.0.0 of the SI Reference Point
The SI Reference Point is a digital representation of the SI Brochure, which defines the International System of Units (SI), the world’s only internationally agreed system of units. By making core SI reference information available in machine-actionable-format, the SI Reference Point helps ensure that the SI can be used consistently in digital applications and data exchange.
Supporting digital metrology
The first stable release of the SI Reference Point marks an important milestone in the digital transformation of the international metrology system. It provides a common digital reference for representing SI units in a machine-actionable-format.
The SI Reference Point provides a machine-actionable representation of the SI units that can be accessed and reused across digital environments. This helps support:
- the interoperability and reuse of measurement information;
- digital metrological traceability;
- the harmonization of digital calibration certificates and digital reference material certificates;
- consistent communication between measurement devices and sensor networks;
- anchoring other systems for digital representation of units of measurement.
The SI Reference Point was developed by an international group of experts working through the CIPM Forum on Metrology and Digitalization (FORUM-MD) and its associated working groups.