← Back to catalogue
Research draft

era

vr.tr.era-q6428674 · INF.KNW

Let an agent explain kinds of eras and how they are reckoned, convert dates between era systems, describe historical and geological eras, and separate loose uses.

Thing Registry Information and virtual systems

Research draft, second pass

A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.

written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify

Researched by: Claude

Purpose and description

Let an agent explain kinds of eras and how they are reckoned, convert dates between era systems, describe historical and geological eras, and separate loose uses.

A period of time reckoned from a fixed point or defined by a distinctive character, including calendar eras counted from an epoch, era names used in East Asian and other regnal systems such as Japanese, Chinese, Mongolian and Thai era names, historical eras such as the Victorian era, and geological eras; the term also appears in phrases such as all-time in sports records.

What it is for: Reckoning and naming periods of time.

It can be explain calendar eras and era names; convert dates between era systems; describe historical and geological eras; separate loose uses.

Distinguishing features

Time reckoning

Epoch-based or character-based

Multiple systems

Cultural significance

What it looks like

Not physical; a named or counted span of time.

How it is recognised

Period from an epoch or with a character

Calendar, regnal, historical or geological

An age or period may be a subdivision of an era

Related models

is a kind of - category

historical period

is related to - a historical era

Middle Ages

is related to - succession and regnal eras

inheritance

is related to - reckoning systems

calendar

In practice

Families and kinds

calendar eras such as the Common Era and Hijri era

era names in regnal systems

historical eras

geological eras

informal eras in culture and sport

Standards and regulation

ISO 8601 date conventions

Official era name proclamations

Geological time scale by the International Commission on Stratigraphy

Failure modes and hazards

Date conversion errors between eras

Confusing era senses

Anachronistic era labels

Also called

calendar eraera nameall-timeunofficial era nameMongolian era namesThai era namesVietnamese era nameKorean era nameliterary periodGADV-protein world hypothesisSymbiocene epochnormal scienceSpanish eraastrological ageAges of Manarchaeological periodinterstadialstadialfixed-interest periodgeological eraturn-around-timegrace periodcosmological epochheroic agedigital eraera names of JoseonWaves of Russian science fiction

Where this came from

wikidata · CC0 1.0

Source repository Registry entry point

Also registered as vr.tr.era

Drafted structure

Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.

Reckon Calendar eras.

Conversion.

Systems

Era systems.

Systems

Systems.

  1. What are calendar eras such as the Common Era, Hijri, Buddhist and Japanese era names, and how are dates converted between them? definition
  2. What is this date in another era system? action

Names

Era names.

Names

Era names.

  1. How do era names work in Japanese, Chinese, Mongolian and Thai systems, and how are new eras proclaimed? provenance
  2. Which entry fits a specific era name? action
History Historical eras.

Periodisation.

Periods

Naming historical eras.

Periods

Historical eras.

  1. How do historians define and name eras such as the Victorian era, and how are boundaries debated? provenance
  2. Which entry fits a specific era? action

Geology

Geological eras.

Geology

Geological eras.

  1. What are the geological eras, and how are they defined by the international time scale? provenance
  2. How do eras relate to periods and eons? definition
Use Everyday uses.

Language.

Informal

Informal eras.

Informal

Informal eras.

  1. What do phrases such as all-time, the digital era or a new era mean in context? definition
  2. Is a loose or a formal sense meant? boundary

Data

Eras in data.

Data

Data.

  1. How should era-based dates be encoded and stored to avoid ambiguity? action
  2. Which standards apply? provenance
Learn Teaching.

Education.

Teach

Teaching eras.

Teach

Teaching.

  1. How can era systems be taught with timelines and conversions? action
  2. Which misconceptions arise? provenance

Origins

Origins of era reckoning.

Origins

Origins.

  1. How did era reckoning develop in different civilisations, according to historians? provenance
  2. Which references are standard? provenance

What the second pass must settle

  • Should each era system be a separate entry?
  • How should conversion tools be linked?
  • How should geological eras be linked?
Draft as JSON