The members of the Darwin Core Maintenance Group are happy to announce the opening of a minimum 30-day period for public review for a set of proposed changes to Darwin Core coming out of research and discussions in the Material Sample Task Group https://www.tdwg.org/community/osr/material-sample/, ably led by Teresa Mayfield-Meyer over the past two years.

Please refer to the documentation we have provided on the review process and the maintenance of the Darwin Core standard in general at https://github.com/tdwg/dwc/wiki/Darwin-Core -Maintenance-Frequently-Asked-Questions.

For your reference and convenience we are providing a table with links to the proposed changes, organized in keeping with the order in the Darwin Core Quick Reference Guide (https://dwc.tdwg.org/terms/). The relevant issues are also listed in the following milestone: https://github.com/tdwg/dwc/milestone/18.

Your comments are welcome and important for the evolution of the Darwin Core standard.

Thank you,

The Darwin Core Material Sample Task Group The Darwin Core Maintenance Team

Category Term Issue Action Nature Record-level references https://github.com/tdwg/dwc/issues/456 change non-normative Record-level basisOfRecord https://github.com/tdwg/dwc/issues/457 change non-normative MaterialEntity https://github.com/tdwg/dwc/issues/426 new normative MaterialSample https://github.com/tdwg/dwc/issues/451 change normative MaterialEntity materialEntityID https://github.com/tdwg/dwc/issues/455 new normative MaterialEntity preparations https://github.com/tdwg/dwc/issues/452 change normative MaterialEntity disposition https://github.com/tdwg/dwc/issues/453 change normative MaterialEntity verbatimLabel https://github.com/tdwg/dwc/issues/458 change non-normative MaterialEntity materialEntityRemarks https://github.com/tdwg/dwc/issues/461 new normative GeologicalContext earliestEonOrLowestEonothem https://github.com/tdwg/dwc/issues/465 change normative GeologicalContext latestEonOrHighestEonothem https://github.com/tdwg/dwc/issues/474 change normative GeologicalContext earliestEraOrLowestErathem https://github.com/tdwg/dwc/issues/467 change normative GeologicalContext latestEraOrHighestErathem https://github.com/tdwg/dwc/issues/476 change normative GeologicalContext earliestPeriodOrLowestSystem https://github.com/tdwg/dwc/issues/469 change normative GeologicalContext latestPeriodOrHighestSystem https://github.com/tdwg/dwc/issues/478 change normative GeologicalContext earliestEpochOrLowestSeries https://github.com/tdwg/dwc/issues/466 change normative GeologicalContext latestEpochOrHighestSeries https://github.com/tdwg/dwc/issues/475 change normative GeologicalContext earliestAgeOrLowestStage https://github.com/tdwg/dwc/issues/464 change normative GeologicalContext latestAgeOrHighestStage https://github.com/tdwg/dwc/issues/473 change normative GeologicalContext lowestBiostratigraphicZone https://github.com/tdwg/dwc/issues/479 change normative GeologicalContext highestBiostratigraphicZone https://github.com/tdwg/dwc/issues/472 change normative GeologicalContext lithostratigraphicTerms https://github.com/tdwg/dwc/issues/462 change normative GeologicalContext group https://github.com/tdwg/dwc/issues/471 change normative GeologicalContext formation https://github.com/tdwg/dwc/issues/470 change normative GeologicalContext member https://github.com/tdwg/dwc/issues/480 change normative GeologicalContext bed https://github.com/tdwg/dwc/issues/463 change normative GeologicalContext dwciri:earliestGeochronologicalEra https://github.com/tdwg/dwc/issues/468 change normative GeologicalContext dwciri:latestGeochronologicalEra https://github.com/tdwg/dwc/issues/477 change normative MeasurementOrFact https://github.com/tdwg/dwc/issues/459 change normative ResourceRelationship https://github.com/tdwg/dwc/issues/460 change normative