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digit

vr.tr.digit · thing-digit

Let an agent handle digits by base, symbol, place value and use in codes and check digits.

Thing Registry Cross-cutting context XCT.QTY
Bundle → Layer → Finding → QuestionsClassifiersWhat it isWhy it existsDistinguishing featuresWhat robots and AI may and may not doMoral aspectsOwnersLinks to other meta-modelsIdentity and identifiersDirect propertiesRecognitionCapabilities and actionsHazards and failure modesStandards and interfacesContext of useSources

Bundle → Layer → Finding → Questions Filled

4 bundles · 8 layers · 8 findings · 16 questions

System Which base.

Base

Radix.

Base

Base.

  1. In which base is the digit used? definition
  2. Which symbols are valid? definition

Script

Writing system.

Script

Script.

  1. Which script are the digits written in? definition
  2. How do they map to ASCII digits? action
Value Place value.

Place

Position.

Place

Place value.

  1. What value does the digit have in this position? measurement
  2. How is the number converted? action

Conversion

Between bases.

Conversion

Base conversion.

  1. What is this number in another base? measurement
  2. Is the conversion exact? boundary
Codes Check digits.

Check digits

Validation.

Check

Check digits.

  1. Which check digit algorithm applies? definition
  2. Is the code valid? boundary

Data

Storage.

Data

Data handling.

  1. Should the value be stored as text to keep leading zeros? boundary
  2. Is the digit count fixed? definition
Senses Disambiguation.

Anatomy

Fingers and toes.

Anatomy

Anatomical sense.

  1. Is a finger or toe meant? boundary
  2. Which entry fits? action

Teaching

Learning.

Teaching

Teaching.

  1. How can place value be taught? action
  2. What misconceptions are common? boundary

Classifiers Filled

Family
Thing Registry
Category
Cross-cutting context
Entry kind
noun.quantity
Plane
XCT
Domain
XCT.QTY
Facets: substance
abstract
Facets: origin
conceptual
Facets: agency
inert
Facets: mobility
not-applicable
Facets: scale
not-applicable
Facets: affordances
observable
Other names and narrower kinds
figure, binary digit, octal digit, decimal digit, duodecimal digit, hexadecimal digit, significant digit, significant figure, zero, 0, nought, cipher

What it is Filled

One of the symbols that collectively form a system of numeration, such as 0-9 in decimal, 0-1 in binary or 0-9 and A-F in hexadecimal; also called a figure.

Why it exists Filled

Let an agent handle digits by base, symbol, place value and use in codes and check digits.

Distinguishing features Filled

  • Element of a numeral system
  • Number of digits equals the base
  • Place value determines meaning
  • Different scripts have different digit shapes

What robots and AI may and may not do Filled

Must not

  • Change digits in records such as accounts or identity numbers without authority.
  • Misread a digit in safety-critical values such as doses without flagging uncertainty.
  • Generate valid-looking identifiers to impersonate real ones.

Only with a human decision

  • Correcting digits in official or financial records.

May

  • Read, write and convert digits between numeral systems.
  • Check digits in identifiers using their check digit rules.

Moral aspects Filled

  • A single wrong digit can misroute money, medicine or people.
  • Numbers that identify people are personal data.

Who is affected

  • People identified by numbers
  • Patients
  • Account holders

Owners Filled

Steward

Nobody owns the concept; the issuer of each numbered record answers for it.

Links to other meta-models Filled

parent

  • oewn-13750609-n - registry parent class

related

  • numeral system - system
  • number - representation
  • digit (finger or toe) - anatomical sense
  • check digit - validation

What else AI and robots need to interact with it Filled

Identity and identifiers required Filled

  • Vercy registry: vr.tr.digit
  • Open English WordNet: oewn-13763162-n
  • Unicode digit characters: category Nd decimal digits in scripts

Direct properties not applicable Not applicable

Not applicable

Plane XCT: no invented physical properties.

Recognition optional Filled

  • Symbols 0-9 in decimal
  • Binary, octal and hexadecimal digits
  • Fingers and toes (anatomical digits) are another sense
  • Numeral symbols in text and displays.

Capabilities and actions required Filled

  • convert between bases
  • compute digit sums and check digits
  • read place values
  • handle digits in data validation

Hazards and failure modes required Filled

  • Base confusion
  • Script digits not parsed by software
  • Leading zero loss in data

Standards and interfaces required Filled

  • Unicode Standard
  • ISO 7064 check digit systems

Context of use required Filled

  • Writing numbers in positional numeral systems.
  • decimal digits
  • binary digits (bits)
  • octal digits
  • hexadecimal digits
  • digits in other scripts

Sources Filled

  1. Open English WordNet 2024, synset oewn-13763162-n - sense and gloss of the concept
  2. Wiktionary: digit - word senses and usage

Open questions

  • Should digit sets per base be separate entries?
  • How should script digits be linked?
  • How should the anatomical sense be split off?

Machine files

Card as JSON Specification Card backlog vercy.card/1

Provenance

thing registry research (pass 2) · unreviewed

Built from: models/things/publications/thing-digit/spec.json