Enum: ChronoAgeSysEnum

Options for specifying the chonometric age reference or timescale of a date.

Permissible Values

Value	Description
BCE	Before Common Era (before year 0 in the Christian calendar), equivalent to BC...
CE	Common Era (after year 0 in the Christian calendar), equivalent to AD (anno D...
BP	Before Present (~1950), known as 'Standard Year'
cal BP	Calibrated Before Present (~1950), known as 'Standard Year'
cal BCE	Calibrated Before Common Era (year 0 in the Christian calendar), equivalent t...
cal CE	Calibrated Common Era (~1950), equivalent to AD (anno Domini, after Christ)
ka	kiloannum; thousands of years ago
Ma	megaannum; millions of years ago

Terms

Name	Description
earliest_chrono_sys	The reference system associated with the earliest_chrono_age
latest_chrono_sys	The reference system associated with the latest_chrono_age

LinkML Source

name: ChronoAgeSysEnum
description: Options for specifying the chonometric age reference or timescale of
  a date.
from_schema: https://w3id.org/mixs
rank: 1000
permissible_values:
  BCE:
    text: BCE
    description: Before Common Era (before year 0 in the Christian calendar), equivalent
      to BC (before Christ).
  CE:
    text: CE
    description: Common Era (after year 0 in the Christian calendar), equivalent to
      AD (anno Domini, after Christ).
  BP:
    text: BP
    description: Before Present (~1950), known as 'Standard Year'.
  cal BP:
    text: cal BP
    description: Calibrated Before Present (~1950), known as 'Standard Year'.
  cal BCE:
    text: cal BCE
    description: Calibrated Before Common Era (year 0 in the Christian calendar),
      equivalent to BC (before Christ).
  cal CE:
    text: cal CE
    description: Calibrated Common Era (~1950), equivalent to AD (anno Domini, after
      Christ).
  ka:
    text: ka
    description: kiloannum; thousands of years ago.
  Ma:
    text: Ma
    description: megaannum; millions of years ago.