Schema elements previously developed as part of various GA4GH efforts had been assembled in the SchemaBlocks demonstrator. Those schemas and documentation will be re-implemented in this space.

Additional information about data formats can be found on the GA4GH::Metadata site.

Dates & Times

Date and time formats are specified as ISO8601 compatible strings, both for time points as well as for intervals and durations.

An optionally required granularity may be specified as part of the respective attributes' documentations.


  • external information can be found at W3C: [ISO8601](

Units of time

  • Y = year
  • M = month
  • D = day
  • H = hour
  • M = minute
  • S = second
  • .S = decimal fraction of a second

@mbaudis 2018-12-21: more ...