Changes

Changes to this specification are listed below.

Version 3.0-d2 (April 2026)

Add new reference data examples:
- Header-only record with FDSN and non-FDSN headers
- Record with large field Source ID incompatible with SEED:
  
  “FDSN:NETWORK_STATION_LOCATION_G_XX_” (not real, for illustration only)

Version 3.0-d1 (February 2026)

Publish the FDSN reserved extra headers schema definition in JSON Schema specification 2020-12 (latest as of this publication). The previous schema was “2023-07”, but was never officially released and is no longer available. There is no functional change to the FDSN reserved headers, only a change in the schema reference.

Version 3.0-d0 (April 2023)

Specification revision 2023-01-18 adopted by FDSN.
Reference data were refined following the specification revision.

2021

Initial specification of miniSEED 3