knife money
Enable an agent to recognise knife money, assess the evidence for its monetary identity and attribution, and decide how a specimen may be documented, examined and conserved.
Bundle → Layer → Finding → Questions Filled
6 bundles · 11 layers · 16 findings · 30 questions
Monetary identity Establish whether the knife-shaped object belongs to this registered monetary kind.
Currency boundary
Test monetary identification against neighbouring object kinds.
Evidence of monetary form
Record the evidence connecting the object to recognised knife-money issues rather than merely to knives.
- Which documented monetary issue shares this object's morphology and marks? definition
- What evidence distinguishes it from a working knife, miniature tool or knife-shaped ornament? boundary
Original purpose and later use
Separate manufacture as money from subsequent reuse and reproduction.
Monetary, charm and replica status
Allow original function, subsequent use and present classification to differ.
- Does evidence support original monetary manufacture, later charm use, manufacture as a charm, or modern reproduction? boundary
- Which contextual records support that interpretation rather than a classification based only on appearance? provenance
Knife form and metrology Describe the geometry and surviving mass used to recognise and compare knife-money varieties.
Diagnostic geometry
Locate and describe the knife-derived parts without assuming every variety has identical features.
Blade, handle and terminal pattern
Record tip shape, body curvature, ridges and terminal geometry as observed features.
- What blade-tip profile, curvature, handle ridges and terminal form are actually visible? definition
- Which apparent shape differences could result from breakage, bending, wear or repair? boundary
Measured comparison
Compare dimensions and mass with specimens of the proposed variety.
Condition-qualified metrology
Retain measurement conventions and condition qualifications with every comparison.
- What are the surviving mass and dimensions, and how were length and thickness measured on the curved object? measurement
- How does it compare with documented specimens of the proposed variety after accounting for missing metal and deposits? measurement
Inscriptions and attribution Connect visible signs and comparative evidence to qualified readings and issue assignments.
Sign documentation
Preserve marks as observed before normalising or interpreting them.
Face-specific inscription evidence
Associate each visible mark with its location, orientation and image evidence.
- Which marks occur on each face, handle or edge, and which are partly obscured or missing? measurement
- Which proposed readings reproduce visible signs, and which depend on reconstruction from comparison pieces? provenance
Historical assignment
Evaluate issuer, place and chronology as distinct attribution claims.
Supported issue assignment
Record competing assignments and the evidence discriminating between them.
- Which sources support the proposed issuing authority, production region and date interval? provenance
- Does the inscription interpretation concern a place, authority, value or another meaning, and what alternatives remain? definition
- Has a reported findspot been incorrectly treated as proof of the place of manufacture? boundary
Manufacture and authenticity Assess material and production evidence against the proposed knife-money attribution.
Production evidence
Document metal composition and traces of forming and finishing.
Alloy and casting traces
Treat composition, seams, feed-point traces and surface detail as evidence requiring contextual interpretation.
- What material analyses exist, and do their sampling methods distinguish surface alteration from underlying alloy? measurement
- Which observable traces support the proposed production method, and how do they compare with documented examples? provenance
Alteration and imitation
Evaluate features that may have been reproduced, modified or assembled.
Authenticity evidence balance
Maintain an explicit assessment without making patina or a single technical result decisive.
- What evidence supports or challenges the age and originality of the blade, handle, terminal and inscription? provenance
- Are there indications of recutting, artificial surface treatment, copied damage or joined components? boundary
- Which additional non-destructive examination would best resolve the leading authenticity uncertainty? action
Monetary context and care Preserve evidence of monetary use while governing examination of the surviving object.
Circulation context
Distinguish observed associations from inferred value and circulation.
Find associations and value claims
Link monetary interpretations to documented assemblages, texts and comparative studies.
- Is the specimen associated with a recorded hoard, excavation context or other currency forms? provenance
- What evidence supports any claimed denomination or exchange relationship rather than inferring it from size or mass? definition
- Can evidence distinguish circulation from burial deposition, ritual use or later collecting? boundary
Diagnostic surface preservation
Determine handling and examination constraints from fragile geometry and evidence-bearing surfaces.
Knife-money handling decisions
Protect the blade-handle junction, terminal and inscriptions during documentation and care.
- Where do cracks, thin sections, joins or suspected active corrosion make the blade or terminal vulnerable? measurement
- What support and imaging arrangement will expose both faces without loading a fragile terminal or bending the blade? action
- Would proposed cleaning or sampling remove inscription detail, casting traces or deposits needed for assessment? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these check these first hold for the sense of knife money this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these kinds and varieties hold for the sense of knife money this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these real-world use hold for the sense of knife money this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these failure modes and hazards hold for the sense of knife money this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these regional variation hold for the sense of knife money this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of knife money this model covers, and on what evidence? provenance
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.OBJ
What it is Filled
Knife money is a class of cast bronze currency shaped like knives, issued and circulated in parts of ancient China during the Eastern Zhou period.
In scope
- Knife-shaped monetary identity and boundaries against tools, charms and replicas
- Blade, handle and terminal morphology used in variety identification
- Inscriptions, casting evidence, composition and metrology
- Evidence for issuing authority, chronology and monetary use
- Specimen authenticity, completeness and conservation constraints
Out of scope
- Working knives and their cutting performance
- Spade money and ordinary round coinage as independent currency kinds
- Complete histories of issuing states and monetary systems
- Knife-shaped charms or replicas as independently modelled object kinds
- Coin-market pricing and investment recommendations
- Museum collection administration beyond links needed to establish specimen evidence
Why it exists Filled
Enable an agent to recognise knife money, assess the evidence for its monetary identity and attribution, and decide how a specimen may be documented, examined and conserved.
Distinguishing features Filled
- Require a supported monetary attribution in addition to a knife-like outline; resemblance alone does not distinguish currency from a tool or imitation.
- Compare the blade profile, handle ridges and terminal structure as a combination, allowing documented variation and missing parts rather than requiring one universal silhouette.
- Separate knife money from spade money by its knife-derived body plan rather than treating all tool-shaped currencies as interchangeable.
- Distinguish original monetary production from later charm use or imitation; museum classifications can overlap, as illustrated by the [British Museum coin, knife-money and charm record](https://www.britishmuseum.org/collection/object/C_1975-0809-1).
- Treat forms combining knife and round-coin features as a boundary requiring explicit attribution; the [British Museum bronze knife coin description](https://artsandculture.google.com/asset/bronze-knife-coin-inlaid-with-gold/1AEaYOGcHYTRFw?hl=en) documents such a combination.
What robots and AI may and may not do Filled
Must not
- Authenticate or value a specimen from photographs alone as if that were conclusive.
- Assist in selling or exporting pieces that may come from looting or illicit excavation.
- Present replicas or cast copies as ancient originals.
- Recommend cleaning or treating a specimen in ways that destroy its patina or evidence.
Only with a human decision
- Deciding on conservation treatment of a specimen.
- Accepting or rejecting a specimen into a collection or sale where provenance is incomplete.
May
- Describe a piece of knife money from documented evidence such as provenance, inscriptions and analysis.
- State the uncertainty when attribution to a state or period is not supported.
Moral aspects Filled
- Ancient Chinese bronzes are often looted, and trade can fund destruction of archaeological sites.
- Forgeries mislead buyers and distort the historical record.
Who is affected
- Source communities and states
- Collectors and museums
- Researchers
Owners Filled
Steward
The museum, collector or institution holding the specimen; export rules of the country of origin apply.
Master systems
- Museum collection catalogues
- National cultural property registers
Links to other meta-models Filled
parent
- Q41207 - registry parent class
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.knife-money
- Wikidata: Q1069036 (https://www.wikidata.org/wiki/Q1069036)
Direct properties required Filled
- Monetary identity assessment: supported knife money | possible knife money | imitation | other object | unresolved
- Attributed variety: Reference to a named numismatic variety and its diagnostic catalogue entry, with confidence
- Blade and handle configuration: Recorded tip profile, curvature, blade-handle transition, ridges and terminal form; unknown where obscured
- Specimen dimensions: Overall length, maximum blade width, thickness and terminal opening dimensions in mm
- Surviving mass: g, with completeness and attached deposits recorded
- Inscription record: Linked face-specific images, sign locations, diplomatic transcription, proposed readings and references
- Material composition: Elemental mass percentages where measured, with method, sampling location and surface limitations
- Issue attribution: Proposed authority, production region and date interval linked to supporting evidence
- Authenticity assessment: unassessed | supported | disputed | indeterminate | demonstrated modern reproduction
- Physical integrity: Complete or fragmentary; mapped losses, cracks, joins, deformation, deposits and suspected active corrosion
Recognition required Filled
- A cast bronze object shaped like a knife, with a curved blade, a handle and usually a ring at the end.
- Cast characters on the blade naming a mint or value.
- Green or brown corrosion patina; a too-uniform or painted patina suggests a copy.
Capabilities and actions required Filled
- Compare a specimen with documented knife-money varieties and explain matches and contradictions.
- Capture scaled images of both faces, edges, blade tip and terminal before transcribing marks.
- Measure surviving geometry and mass with explicit allowances for losses and deposits.
- Build competing inscription readings and historical attributions with linked evidence.
- Flag possible replicas, altered inscriptions or composite specimens for specialist examination.
- Select supported handling and examination actions that protect fragile terminals, blades and diagnostic surfaces.
Hazards and failure modes required Filled
- Forged or recast copies are common and can be sold as originals.
- Harsh cleaning removes patina and destroys evidence of age.
- Undocumented trade can launder looted material.
Standards and interfaces required Filled
- Convention on the Means of Prohibiting and Preventing the Illicit Import, Export and Transfer of Ownership of Cultural Property (1970), UNESCO.
Context of use required Filled
- Knife money served as currency in parts of ancient China during the Eastern Zhou period.
- Surviving specimens are studied in archaeology, numismatics and museums to investigate exchange, regional authority and casting practices.
- Documentation and conservation depend on evidence such as inscriptions, provenance, material condition and archaeological context.
Sources Filled
- Wikidata item Q1069036: knife money - identity and sense of the item
- Wikipedia: Knife money - general description of the item
Open questions
- Does this registry entry include later knife-and-round-coin hybrid issues, or should it link to a narrower neighbouring model for those issues?
- Which scholarly typology and terminology should anchor variety names, including conflicting inscription readings and historical attributions?
- What reference populations establish meaningful dimensional, mass and alloy comparisons for each included variety?
- Which archaeological and textual evidence supports circulation areas, chronology and value relationships for the included issues?
- Which authenticity and conservation assessments require specialist examination before an agent can recommend further intervention?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q1069036/spec.json