Efficacy Justification (why is this change necessary?): Create consistency of terms for material in Darwin Core.
Demand Justification (if the change is semantic in nature, name at least two organizations that independently need this term): Material Sample Task Group, which includes representatives of over 10 organizations.
Stability Justification (what concerns are there that this might affect existing implementations?): None
Implications for dwciri: namespace (does this change affect a dwciri term version)?: This is a dwciri: term.
Proposed attributes of the new term version (Please put actual changes to be implemented in bold and ~strikethrough~):
Term name (in lowerCamelCase for properties, UpperCamelCase for classes): earliestGeochronologicalEra
Term label (English, not normative): Earliest Geochronological Era
Organized in Class (e.g., Occurrence, Event, Location, Taxon): Geological Context
Definition of the term (normative): Use to link a dwc:GeologicalContext instance to chronostratigraphic time periods at the lowest possible level in a standardized hierarchy. Use this property to point to the earliest possible geological time period from which the cataloged itemdwc:MaterialEntity was collected.
Usage comments (recommendations regarding content, etc., not normative): Recommended best practice is to use an IRI from a controlled vocabulary. A "convenience property" that replaces Darwin Core literal-value terms related to geological context. See Section 2.7.6 of the Darwin Core RDF Guide for details.
Examples (not normative):
Refines (identifier of the broader term this term refines; normative): None
Replaces (identifier of the existing term that would be deprecated and replaced by this term; normative): None
ABCD 2.06 (XPATH of the equivalent term in ABCD or EFG; not normative): not in ABCD
Term change
Current Term definition: https://dwc.tdwg.org/list/#dwciri_earliestGeochronologicalEra
Proposed attributes of the new term version (Please put actual changes to be implemented in bold and ~strikethrough~):
cataloged itemdwc:MaterialEntity was collected.