fork
Enable an AI agent to recognise a physical fork, assess whether it is fit for an intended food-handling task, and decide whether to use, clean, repair, isolate or retire it.
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.
Researched by: Codex + Grok
Purpose and description
Enable an AI agent to recognise a physical fork, assess whether it is fit for an intended food-handling task, and decide whether to use, clean, repair, isolate or retire it.
A fork is a rigid handheld cutlery implement whose working head is two or more tines used to pierce, hold and lift food, usually as the companion to a knife (and often a spoon) in a Western place setting.
It can be Select a fork for eating, serving or holding food during cutting using its geometry and condition.; Pierce, gather, lift, transfer or release food within an evidenced task capability.; Inspect tine tips, gaps, roots and handle joints for residue, damage or looseness.; Clean and dry the fork using a method supported for its materials and construction.; Isolate a fork with unresolved contamination, damaged tines or uncertain food-contact suitability.; Assess whether repair is supported and verify the result before returning the fork to use..
Distinguishing features
The working head has separated projecting tines whose gaps permit food engagement; a pointed blade without these gaps is not sufficient.
The utensil primarily engages food through its tines rather than containing it in a bowl, distinguishing a conventional fork from a spoon.
Its tines form a common working head operated through one handle, distinguishing it from independently manipulated chopsticks and opposing-jaw tongs.
A substantial scoop combined with tines requires a hybrid classification decision rather than automatic treatment as a conventional fork.
Food-handling intent must be evidenced by design, provenance or documented use; a fork-shaped gardening or machine component does not qualify on silhouette alone.
Scope
+ Fork identity, intended role and boundaries between eating, serving and carving variants
+ Tine geometry, head shape and handle configuration
+ Ability to engage, retain and release particular foods
+ Material, finish and construction relevant to contact, cleaning and handling
+ Cleanliness, tine damage and fitness for an intended use
- Food composition, preparation history and dietary suitability
- Meals, place settings and dining etiquette
- Users' health conditions and general assistance requirements
- Cleaning appliances, detergents and sanitation procedures as independent things
- Agricultural forks, machinery forks, tuning forks and software forks pending registry clarification
Characteristics
- Intended food-handling role
- eating | serving | carving support | cooking | other | unknown Determines which contact conditions, handling demands and food-engagement tasks should be assessed.
- Tine count
- integer count, recording designed and currently present counts separately Helps identify the fork configuration and detect missing tines.
- Tine geometry
- tine length, width, thickness and clear gap in mm; curvature and alignment where measurable Affects penetration, food retention, access for cleaning and detection of deformation.
- Tip profile
- rounded | tapered | pointed | mixed | damaged | unknown Influences food penetration and suitability for the intended contact with a mouth or hand.
- Head and handle dimensions
- overall length, head width and handle cross-section in mm; mass in g Supports assessment of reach, grip, portion handling and storage fit.
- Material and finish by component
- identified material, coating and finish for tines, neck, handle and joints; unknown where unverified Supports evidence-based decisions about food contact, heat exposure and cleaning.
- Structural condition
- observed tine alignment, cracks, missing parts, burrs, joint looseness and surface deterioration Separates cosmetic wear from conditions that could compromise handling or introduce fragments.
- Cleanliness evidence
- visible residue locations, recorded cleaning, known contact history and unresolved contamination Prevents a clean appearance from being treated as proof of suitability for food contact.
- Task compatibility
- fork linked to a specified food, user, vessel and action, with evidence and limitations A fork can be suitable for one task and unsuitable for another.
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.fork
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 6 bundles · 11 layers · 18 findings · 28 questions.
Fork identity and role Establishes whether the object belongs to this fork model and what food-handling role it serves.
Fork-shaped objects and food-utensil hybrids cannot be classified reliably by name or tine count alone.
Working head identity
Examines the tine arrangement and its relationship to other working surfaces.
Tined food utensil boundary
Record the observed head configuration and evidence supporting classification as a food-handling fork.
- Does the object have separated tines operated through a common handle to engage food? definition
- Does a bowl, blade or other working feature make this a hybrid requiring another model? boundary
Intended fork role
Distinguishes intended use from a role inferred from appearance.
Role evidence
Record whether eating, serving, carving support or cooking is documented, observed or only inferred.
- What markings, product documentation or use history establish the intended role? provenance
- Is the fork intended to enter the mouth, transfer food between vessels or hold food while another tool cuts? definition
Tine and food engagement Describes how the tine configuration engages, supports and releases food.
A fork's usefulness depends on the interaction between its tines and the particular food, rather than a generic carrying capacity.
Penetration and spacing
Records the geometry responsible for entering or gathering food.
Tine engagement profile
Record tine count, dimensions, clear gaps and tip shape without assuming that one configuration suits every food.
- What are the tine count, usable length, clear gaps and tip profiles? measurement
- Can these tines engage the intended food without unacceptable crushing, slipping or fragmentation? action
Retention and release
Assesses support during lifting and controlled separation from the tines.
Food transfer behaviour
Record observed retention and release for a specified food, portion and movement.
- For the intended portion and lifting orientation, does food stay engaged or fall through or off the tines? measurement
- Can the food be released at the destination without excessive force or an unintended scraping action? action
Grip, reach and contact Connects handle and head geometry to the user, mouth, vessel and nearby tools.
A fork must place its tines accurately while keeping the user's grip and other contact surfaces appropriate to the task.
Handle control
Assesses orientation, grip security and usable reach.
Controlled tine positioning
Record whether the intended user can orient and control the working head under the expected handling conditions.
- What handle dimensions, head offset and overall length determine grip and reach? measurement
- Can the intended user maintain tine orientation with the expected wetness, food resistance and movement? action
Mouth, vessel and tool fit
Examines the contact boundaries of the intended operation.
Task contact clearance
Record relevant clearances and contact constraints for eating, reaching into vessels or holding food beside a cutting tool.
- Does head width, tine length or tip condition restrict the intended mouth or vessel contact? boundary
- Can the task be performed with adequate clearance from the vessel rim, gripping hand and any cutting tool? action
Food contact and cleaning Records material evidence and the cleanliness of the fork's food-contact surfaces and crevices.
Tine gaps, tine roots and mixed-material joints create inspection and cleaning concerns specific to fork construction.
Contact material evidence
Identifies exposed materials and supported conditions of use.
Material use limits
Record materials, coatings and documented restrictions without inferring food-contact suitability from appearance.
- What evidence identifies the exposed tine materials, coatings and any handle material that may contact food? provenance
- What documented limits apply to food contact, temperature and cleaning for this fork? boundary
Tine gap and joint cleanliness
Locates residue and uncertainty at difficult-to-inspect features.
Cleaning readiness
Record visible residue, relevant contact history and whether the supported cleaning method can reach affected surfaces.
- Is residue present between tines, at tine roots, beneath decorative relief or around handle joints? measurement
- What supported cleaning action addresses the observed residue and known prior contact before the next use? action
Tine integrity and disposition Connects damage to food handling and decisions about continued use.
Bent, fractured or burred tines can change engagement and contact behaviour even when the fork remains recognisable.
Damage and deformation
Distinguishes intended geometry from wear, distortion and breakage.
Working head integrity
Record missing or misaligned tines, cracks, rough tips and neck or handle-joint instability.
- Which tines or joints show bending, cracking, missing material, burrs or movement relative to the intended configuration? measurement
- What reference or history distinguishes intentional asymmetry from damage? provenance
Continued use decision
Turns observed condition and unresolved evidence into a task-specific disposition.
Use, repair or retire
Record the permitted next action and the evidence required before a damaged or uncertain fork returns to food handling.
- Do the observed tip, tine, surface and joint conditions support the intended next use, or require isolation? action
- If repair is proposed, what evidence supports the method and what inspection must establish fitness before reuse? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Kinds and varieties
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- dinner / place fork (four tines, full size)
- salad fork (shorter than the dinner fork; in some services also used as a fish or luncheon fork)
- fish fork (typically broader tines; often a notch on the leftmost tine)
- dessert / pastry fork (smaller; often three tines with the left tine widened to cut pastry)
- cocktail, oyster or seafood fork (short, two or three tines)
- serving or cold-meat fork (larger head, used from a platter)
- carving fork (two long tines; holds a joint while a carving knife cuts)
- disposable utility fork (stamped plastic or light stainless, single-use or picnic)
- Which of these kinds and varieties hold for the sense of fork this model covers, and on what evidence? provenance
Identifiers and schemes
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Wikidata - Q81881 - table fork / eating fork; not the disambiguation page. Pitchfork is Q209225, bicycle fork Q1368878, tuning fork Q20403.
- Getty AAT - 300043226 - forks (flatware). Agricultural forks are a separate AAT class.
- UNSPSC - 52151504 - commodity code for table forks under tableware.
- HS / Harmonized System - 8215.* - Heading 8215 covers spoons, forks, ladles and similar kitchen or tableware; precious-metal plated ware is 8215.91, other (including stainless) 8215.99.
- GTIN / UPC / EAN - per SKU - Identifies a manufactured pattern and finish, not the kind.
- Which of these identifiers and schemes hold for the sense of fork this model covers, and on what evidence? provenance
Standards and regulation
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- ISO 8442-2 (International Organization for Standardization) - stainless-steel and silver-plated table cutlery: corrosion, plate adhesion, strength.
- ISO 8442-1 (ISO) - cutlery for food preparation (carving and cook's forks sit here more than place forks).
- Regulation (EC) No 1935/2004 (European Union) - food-contact materials, including metal and plastic forks.
- Commission Regulation (EU) No 10/2011 (European Union) - plastic food-contact articles; the usual legal test for disposable polymer forks.
- FDA food-contact provisions, 21 CFR parts 175-189 and the Food Code (United States) - utensils in food service.
- NSF/ANSI 2 (NSF International / ANSI) - food equipment; cited for commercial-grade flatware in food-service procurement.
- REACH, Regulation (EC) No 1907/2006 (European Union) - nickel and other metal restrictions relevant to stainless and plated handles.
- California Proposition 65 (State of California) - warnings where lead or cadmium is present in decorative finishes or antique plate.
- Which of these standards and regulation hold for the sense of fork this model covers, and on what evidence? provenance
Real-world use
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Laid to the left of the plate in a standard Western place setting; additional forks are stacked outward in the order they will be used.
- Used to spear and lift bites, and to pin food while a knife cuts (continental style keeps the fork in the left hand; American 'zigzag' switches it to the right).
- Carving forks hold a roast on a board; serving forks lift slices from a platter.
- Stamped stainless or disposable plastic forks are the default in canteens, airlines, hospitals, takeaway and camping kits.
- Specialist small forks (oyster, snail, pickle, fondue) appear only in the matching service, not in everyday place settings.
- Which of these real-world use hold for the sense of fork this model covers, and on what evidence? provenance
Typical measurements
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- overall length (dinner fork) - 175-210 - mm
- overall length (salad or dessert fork) - 150-180 - mm
- overall length (cocktail or oyster fork) - 110-145 - mm
- mass (stainless dinner fork) - 35-90 - g
- mass (disposable plastic fork) - 2-6 - g
- tine count - 2-4 - count
- tine length - 30-65 - mm
- Which of these typical measurements hold for the sense of fork this model covers, and on what evidence? provenance
Failure modes and hazards
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Tines bend or splay, then fail to hold food; common in thin stampings and in polymer forks under heat.
- A tine snaps and a fragment is swallowed (choking or internal injury); the usual failure of brittle plastic at the neck.
- Pitting and crevice corrosion of low-grade stainless (especially 18/0) in chloride dishwashers; silver plate wears through to a copper or nickel interlayer.
- Nickel-contact dermatitis from 18/8-18/10 stainless or from worn plating.
- Lead or cadmium in antique or decorative painted/enameled handles; food-contact leaching if the coating is damaged.
- Puncture wounds from rigid tines, including plastic forks used as improvised tools.
- Loosening of riveted wooden or resin handles, which then harbour moisture and soil.
- Which of these failure modes and hazards hold for the sense of fork this model covers, and on what evidence? provenance
Regional variation
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Dining style, not the object, is the main split: continental (fork stays in the left hand) versus American switching; both use the same four-tine dinner fork.
- England adopted the table fork late (seventeenth-eighteenth century) relative to Italy and France; multiple specialised forks in service à la russe are a European hotel/restaurant practice more than a North American home one.
- In East Asia the everyday analogue is chopsticks; the fork appears mainly in Western-style restaurants and as an import.
- 'Garden fork' (UK) / 'spading fork' (US) and 'pitchfork' are agricultural tools, not tableware; they share the English name but not the place-setting object.
- Local names (French fourchette, Italian forchetta, German Gabel, Spanish tenedor) all denote the eating implement in ordinary speech; Gabel also names a road fork, which the object does not.
- Which of these regional variation hold for the sense of fork this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- pitchfork / hay fork - Long shaft, two or three widely spaced tines, used to lift loose fodder or debris; not brought to the mouth and not part of a place setting.
- garden / digging / spading fork - Short D-handle or long shaft, thick square tines for breaking soil; a cultivation tool, tested by use in earth rather than at table.
- spork - A spoon bowl with short tines cut into the lip; it scoops liquids, which a fork cannot.
- chopsticks - A pair of sticks with no tines; food is pinched, not pierced. The functional substitute in much of East Asia.
- table knife - A cutting edge rather than tines; often paired with the fork, never a substitute for piercing and lifting bite-sized pieces.
- tuning fork - A U-shaped acoustic resonator struck to sound a pitch; tines are not for food and there is no dining handle.
- bicycle fork - The steerer-and-blades assembly that holds the front wheel; a vehicle structural part, identified by axle and steerer standards, not by tine count.
- trident / fish spear - A thrusting weapon or fishing spear with barbed prongs; length and use (thrown or thrust, not lifted to the mouth) separate it from cutlery.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of fork this model covers, and on what evidence? provenance
Sources
- table fork (Q81881) - Canonical item for the eating implement, with cross-links to AAT, HS-ish trade classes and sister items for pitchfork, bicycle fork and tuning fork.
- Fork - History of European adoption, place-setting types (dinner, fish, pastry, oyster), and distinction from agricultural and other named forks.
- ISO 8442-2: Materials and articles in contact with foodstuffs - Cutlery and table holloware - Part 2: Requirements for stainless steel and silver-plated cutlery - Performance and food-contact requirements that manufacturers of stainless and silver-plated table forks are actually written to (corrosion, adhesion of plate, strength).
- Regulation (EC) No 1935/2004 on materials and articles intended to come into contact with food - EU legal frame for metal (and plastic) forks as food-contact articles: inertness, traceability, and the 'do not transfer constituents in quantities that endanger health' test.
- The Evolution of Useful Things - Henry Petroski (Alfred A. Knopf, 1992) on why the table fork took its four-tine form and how it displaced the knife-as-spear in European dining.
What the second pass must settle
- Does vr.tr.fork mean a food utensil specifically, or a broader family that includes agricultural, mechanical or acoustic forks?
- Does an existing Vercy world model already own this concept and therefore require a registry link instead of a separate publication?
- Which eating, serving, carving and cooking variants belong within this entry, and where should hybrids such as sporks be modelled?
- Which authoritative sources establish material-specific food-contact, heat and cleaning limits for the fork variants in scope?
- What evidence or acceptance criteria should govern damaged-tine rejection, repair and task-specific suitability without inventing universal thresholds?