button
Enable an AI agent to recognise a physical button, assess its attachment and functional state, and decide whether and how it may be fastened, pressed, released, repaired or replaced.
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 button, assess its attachment and functional state, and decide whether and how it may be fastened, pressed, released, repaired or replaced.
A knot, disc, or similar rigid object that, when forced through a buttonhole or loop, fastens one part of a garment or other flexible substrate to another, or that is attached to such a substrate purely as ornament.
It can be Inspect and identify the button's role, host, counterpart and markings.; Fasten or unfasten a compatible button and counterpart when access and condition permit.; Press and release a control button when its function and action authority are established.; Check attachment, clearance and movement using an appropriate non-damaging method.; Clean, reattach or replace the button using methods compatible with its material and host.; Defer operation and record an unresolved function, incompatible fit or suspected defect..
Distinguishing features
A fastening button retains a counterpart such as a hole or loop by passing through it and resisting unintended withdrawal; a bead or ornament without that role does not pass this test.
A control button presents a discrete surface intended for pressing; a control operated principally by rotation or sliding is better identified as a knob or slider.
A physical button has a tangible component or bounded physical contact surface; a rendered clickable image alone is a graphical button.
A button may be only the user-contact component of a switch assembly; identify whether the observed object includes the switching mechanism before treating the two as equivalent.
For press studs and other mating fasteners, inspect the engagement mechanism rather than relying on the name 'button'; their inclusion requires a registry boundary decision.
Scope
+ Physical buttons used to fasten garments, textiles or other flexible assemblies
+ Physical buttons used to initiate a control input through pressing
+ Button geometry, material, markings and accessible contact surfaces
+ Attachment to a host and compatibility with a fastening counterpart or control mechanism
+ Engagement, movement, damage and evidence supporting permitted actions
- Graphical buttons and other software interface elements
- The complete garment, enclosure or appliance hosting the button
- The complete electrical switch, circuit or controlled system behind a button
- Buttonholes, loops and other fastening counterparts as independently maintained objects
- Zippers, hooks, buckles and other fasteners whose operation does not use a button
- Decorative badges or ornaments without a fastening or press-control role
Characteristics
- Functional role
- fastening; press control; combined; unresolved Selects the relevant recognition tests, states and actions.
- Working dimensions
- mm for face width, thickness, projection and applicable attachment dimensions Supports counterpart fit, finger access and replacement assessment.
- Material and surface
- observed or documented material, coating and texture; unknown Helps assess grip, cracking, wear and appropriate cleaning or repair methods.
- Attachment method
- sew-through holes; shank; rivet; clip; threaded mount; integral mounting; other; unknown Determines how the button is retained and how it can be removed or replaced.
- Host and working counterpart
- host object plus buttonhole, loop, actuator or other identified interface A button's usability depends on the specific assembly it serves.
- Fastening engagement
- disengaged; partly engaged; engaged; trapped; unknown; not applicable Distinguishes a secure closure from an incomplete or obstructed fastening.
- Control position and return behaviour
- resting; depressed; latched; stuck; unknown; not applicable, with observed return behaviour Separates normal movement from a retained or failed position.
- Operating force and movement
- N and mm, with direction, test conditions and applicable operating mode Supports assessment of operability without assuming that all buttons share a force or travel threshold.
- Attachment and working-surface condition
- observed looseness, cracks, missing material, wear, contamination or obstruction Identifies defects that can prevent operation or cause detachment.
- Indicated and verified function
- marking or documentation linked to intended function, separately from observed outcome Prevents an agent from treating a label or successful press as proof of the resulting system action.
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.button-2
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 5 bundles · 9 layers · 16 findings · 24 questions.
Button role and recognition Establishes which physical button role is present and what component is being modelled.
The word button can identify a fastening element or a control surface, which require different state judgements and actions.
Functional identification
Identifies the button through its intended interaction.
Button role
Record evidence for fastening, press-control or combined use without inferring function from appearance alone.
- Does this component retain a fastening counterpart, accept a press input, or perform both roles? definition
- What observation, host documentation or other evidence establishes that role? provenance
Component boundary
Separates the button from its host, counterpart and associated mechanism.
Modelled button extent
Record whether the identified thing is a fastening body, a removable control cap or a larger integrated component.
- Where does this button end and its mounting, counterpart or switch mechanism begin? boundary
- What observable feature distinguishes it from an ornament, knob, slider or mating snap fastener? definition
Button fit and retention Describes the geometry and attachment that let the button work in its particular assembly.
A recognisable button can still be unusable because it does not fit its counterpart or is inadequately attached.
Working geometry
Captures dimensions at the interfaces used for fastening or pressing.
Counterpart and access fit
Record fit to a hole or loop for fastening, or clearance and contact access for a control button.
- Which face, thickness, shank or clearance dimensions determine whether this button works with its identified counterpart? measurement
- Can it pass through and retain the fastening counterpart, or move through its intended press path, without interference? measurement
Host attachment
Identifies how the button is held to its host.
Attachment security
Record the retention method and evidence of looseness or separation at that interface.
- Is the button retained by thread through holes, a shank, a rivet, a clip or another identifiable mounting? definition
- What observed movement, thread damage or mounting defect indicates that retention needs attention? measurement
Button engagement and response Records role-specific operating states and separates physical operation from its intended result.
A fastened appearance may conceal partial engagement, and a depressed control does not prove that its command took effect.
Fastening state
Assesses how a fastening button engages its counterpart; not applicable to control-only buttons.
Closure engagement
Record whether the counterpart is fully retained and whether tension or distortion compromises the closure.
- Has the button passed fully through the intended hole or loop, leaving the counterpart retained behind its working face? measurement
- Can the closure be released through its intended motion without forcing the button, attachment or counterpart? action
Press response
Assesses control-button movement and feedback; not applicable to fastening-only buttons.
Actuation and return
Record press movement, tactile or other feedback, return or latching behaviour, and separately verified downstream response.
- What force, travel and release behaviour are observed, and what evidence establishes the expected behaviour for this button? measurement
- What evidence independently confirms whether pressing this button produced the intended action? provenance
Button condition and intervention Connects button-specific defects and function evidence to operation, maintenance and replacement decisions.
The agent needs to distinguish a usable button from one requiring repair and establish the consequences before operating a control.
Functional damage
Assesses damage at the button face, attachment features and movement interfaces.
Defects affecting use
Record cracks through sewing holes or shanks, broken retaining edges, loose caps and obstructions to pressing.
- Are there cracks, worn retaining edges, loose attachment features or contaminants that interfere with this button's specific function? measurement
- Does the observed defect permit continued use, require restricted use or justify taking the button out of service, according to available evidence? action
Operation and replacement decisions
Establishes prerequisites for pressing, servicing or substituting the button.
Justified button action
Record the known function, authority and compatibility evidence needed for the proposed operation or intervention.
- Before pressing this control, what establishes its function, the relevant system state and the agent's authority to trigger that action? action
- For reattachment or replacement, which dimensions, mounting details, material properties and markings must match the host's requirements? boundary
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.
- sew-through flange (two-hole and four-hole)
- shank, including self-shank
- tack, jeans, or rivet button (mechanically clinched, not sewn)
- fabric-covered
- worked or cloth (Dorset, death-head, crocheted, or knotted frog/Mandarin)
- assembled or composite (joined dissimilar materials)
- stud (removable shirt stud or cuff-style push-through)
- magnetic
- Which of these kinds and varieties hold for the sense of button 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 - Q160464 - Item 'button': small fastener used in clothing.
- BnF - 119693859 - Subject named as Boutons.
- GS1 US closure code - GM03CLOSBN - Product-attribute code for a button closure, distinct from snap and toggle codes.
- ASTM ligne (button size) - integer L where 1 ligne = 0.635 mm (0.025 in); 40 L = 1 in - Trade diameter of apparel buttons, not a unique instance identifier.
- Which of these identifiers and schemes hold for the sense of button 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.
- ASTM D2050-23 Terminology Relating to Fasteners and Closures Used with Textiles (ASTM International) - button terms apply to sew-through flange and shank buttons.
- ISO 11610:2023 Protective clothing - Vocabulary (ISO) - button listed as a garment closure, separate from press fastener and toggle button.
- ASTM D7842 holding strength of tack and prong attached button fasteners (ASTM International).
- EN 71-1 Safety of toys - Mechanical and physical properties, clause 8.4 tension test (CEN), applied in apparel specs to trims that fit the small-parts cylinder: typically 90 N for more than 10 s.
- ASTM F963 Standard Consumer Safety Specification for Toy Safety, mandatory in the United States via 16 CFR part 1250 (ASTM International / U.S. CPSC); 90 N tension is widely reused for children's garment trims.
- 16 CFR part 1501 Small Parts Regulation (U.S. CPSC) - children's clothing buttons are listed among articles exempt from the federal small-parts ban, though industry still pull-tests them.
- AS/NZS ISO 8124.1 torque and tension tests (Standards Australia / Standards New Zealand) - children's apparel guidance uses a 70 N, 10 s attachment minimum.
- Which of these standards and regulation hold for the sense of button 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.
- Sewn or clinched onto shirts, jackets, coats, trousers, bags, wallets, and bedding to close overlapping edges through a buttonhole or loop.
- Shirt fronts and cuffs typically use small sew-through buttons (about 16 ligne / 10 mm); suit jackets about 32 ligne / 20 mm; coats 36-40 ligne and larger, often shanked so they sit above thick cloth.
- Metal tack or jeans buttons clinch the waistband of denim and workwear without sewing thread.
- Rows of buttons on cuffs, double-breasted fronts, and livery coats are often ornamental rather than working closures.
- Most of the world's supply is mass-moulded plastic, metal, shell, or wood; Qiaotou in Yongjia County, China, is reported as the dominant manufacturing centre.
- Collected as studio craft, archaeological finds, uniform insignia, and (historically in the United States) stamped clothing buttons used in political campaigns.
- Which of these real-world use hold for the sense of button 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.
- diameter (ligne) - 16 L (shirts) to 32 L (jackets) to 40 L and above (coats); about 10-25+ mm - ligne (1 L = 0.635 mm) or millimetre
- attachment holding force (children's apparel practice) - 70 N for 10 s (AS/NZS ISO 8124.1 guidance) to 90 N for 10 s (EN 71-1 / ASTM F963-derived buyer specs) - newton
- sew-through hole count - 2 or 4 - count
- Which of these typical measurements hold for the sense of button 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.
- Thread or clinch failure so the button detaches; a detached button that fits the small-parts cylinder is a choking, aspiration, or ingestion hazard for young children.
- Chainstitch attachment unravels from a single broken stitch; lockstitch (ISO 4915 type 301) is specified in workwear practice to avoid that.
- Assembled or multi-component buttons separate into pieces; brittle natural materials (shell, bone, horn, wood) crack or shatter, leaving sharp edges.
- Pull-through or tearing of lightweight or knitted fabric when the button is stronger than the substrate; children's guidance requires attachment through two layers or a fusible backing.
- Coatings and alloys can carry restricted substances or nickel that irritate skin; food-like shapes invite mouthing.
- Spare buttons sewn onto children's garments become extra small parts; workwear practice also treats a loose button as foreign-object debris around machinery.
- Which of these failure modes and hazards hold for the sense of button 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.
- Classic Western clothing places the button on the wearer's right for men and left for women; many Hasidic and some other Jewish men reverse this and button right over left.
- German trade names distinguish Ösenknopf (shank), Lochknopf (sew-through holes), and Nietenknopf (jeans/rivet); English 'press stud' (UK) versus 'snap' (US) names the related fastener, not the sewn button.
- ISO protective-clothing vocabulary lists 'toggle button' separately from 'button'; GS1 retail codes likewise split Button, Snap, and Toggle.
- Late-17th-century French law required silk-covered buttons to protect the silk trades; England at the same period restricted fabric buttons to protect the button-makers' guild.
- Stamped clothing and later pin-back campaign buttons are a mainly United States political practice; manufacturing volume is concentrated in Qiaotou, China.
- Which of these regional variation hold for the sense of button 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.
- snap fastener (press stud, press button, dome, popper) - Two interlocking discs that engage by pressure; they do not pass through a buttonhole. ASTM D2050 and ISO 11610 treat snaps as a separate fastener class from buttons.
- push-button - A control surface that actuates a switch or mechanism rather than joining fabric; Wikidata marks Q160464 as different from the push-button item.
- toggle (toggle button) - A short bar passed endways through a loop or frog and then rotated; ISO 11610 lists toggle button as its own closure example, not as a disc-through-buttonhole button.
- slide fastener (zip) - A continuous linear closure of interlocking elements, not a single-point disc or knot through an opening.
- rivet - A permanent clinch not meant to be opened; a jeans button looks similar but is a working fastener paired with a buttonhole.
- pin-back badge (campaign button) - Pinned on as a display, not sewn through a buttonhole to close a garment; modern campaign 'buttons' are badges, unlike the earlier stamped clothing buttons.
- hook-and-loop (touch-and-close) fastener - A surface fastener of hooks engaging loops, listed separately from buttons in ASTM D2050 and ISO 11610.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of button this model covers, and on what evidence? provenance
Sources
- ASTM D2050-23, Standard Terminology Relating to Fasteners and Closures Used with Textiles - Industry definition of a button; distinction of sew-through flange versus sew-through shank; ligne as the trade size unit (1 ligne = 0.635 mm).
- Button - Attachment styles (flat/sew-through, shank, stud, toggle, covered, worked), ligne sizing, men's-right/women's-left convention, materials, and Qiaotou manufacturing share.
- button (Q160464) - Canonical identifier as a small clothing fastener; explicit difference from a push-button; BnF subject ID.
- Button (clothing accessory) - Specialist description of holes or shank sewn to one side and passed through a loop or hole; decorative as well as functional use; historical materials and plastic mass production.
- ISO 11610:2023 Protective clothing - Vocabulary - Places the button among garment closures, listed separately from slide fastener, press fastener (snap), touch-and-close fastener, and toggle button.
- Knopf - German trade kinds: Ösenknopf (shank), Lochknopf (sew-through), Nietenknopf (jeans/rivet).
- Toy Safety Business Guidance - ASTM F963 made mandatory by 16 CFR part 1250; small-parts regime at 16 CFR part 1501.
- Children's Apparel Product Safety Guidelines - Detachment, breakage, sharp edges, and chemical hazards of buttons; 70 N for 10 s attachment test under AS/NZS ISO 8124.1.
- GS1 US Best Practice Guideline for Exchanging Product Images and Attributes - Retail closure code GM03CLOSBN for Button, distinct from Snap (GM03CLOSSN) and Toggle (GM03CLOSTO).
What the second pass must settle
- Does vr.tr.button intentionally include both fastening buttons and physical control buttons, or does another registry entry own one of these senses?
- Are press studs, toggle fasteners and decorative non-functional buttons included here or assigned to neighbouring registered things?
- Does the registry treat a control button as its contact surface or cap, or as the complete push-button switch assembly?
- Which documented tolerances, operating forces and retention criteria apply to each intended host and use context?
- How should fixed touch-sensitive physical controls be distinguished from moving push buttons and graphical buttons?