ZeeBoer is a co-initiator of Open Specifications Format (OSF). OSF is a file format for specifications. Think of product specifications, specifications and project specifications. Independent of the classification used.
Previously, a STABU specification was saved in SUF format. Today STABU uses OSF for its catalog and updates. In addition, KOMO has created a library based on OSF and ZeeBoer itself naturally also uses OSF for its specification texts.