line
Enable an AI agent to recognise a physical line, assess its condition and arrangement, and determine which handling or load-bearing actions are supported by available evidence.
Bundle → Layer → Finding → Questions Filled
5 bundles · 9 layers · 16 findings · 28 questions
Physical identity and extent Establish which flexible article is being modelled and where its material extent begins and ends.
Line recognition
Record the evidence that this article belongs to the registry's physical line concept.
Cord-like flexible form
Capture observable slenderness and bending behaviour without assuming that every elongated flexible article is a line.
- What observations establish a long, thin, flexible physical article of the cord or rope kind? definition
- Does its profile, construction or defining function place it instead with a strap, hose, cable, wire or rigid rod? boundary
Continuity and segments
Resolve individual identity through ends, joins, loops and selected working portions.
Traceable material extent
Record the continuous path of the article and distinguish physical boundaries from temporary working-segment boundaries.
- Can the line be traced between its physical ends or around a closed loop, and where are any joins or obscured portions? boundary
- What are its total and selected working lengths, and under what tension were they measured? measurement
Construction and response Describe the line's material makeup and its evidenced response to bending and pulling.
Material and cross-section
Characterise strands, core, covering and dimensions where these can be established.
Verified line construction
Separate observed construction from identification supplied by labels or product records.
- What material, strand arrangement, core and covering are established, and which remain unknown? definition
- Which markings, product records or examinations support that identification? provenance
- What cross-sectional dimensions occur along the line, and how were compression and irregular shape handled during measurement? measurement
Bending and extension
Record mechanical response under specified conditions without converting observations into unsupported ratings.
Conditioned mechanical response
Describe bending, extension and recovery using applicable documentation or bounded observations.
- What evidence describes extension and recovery at stated loads, durations and environmental conditions? provenance
- What bend-radius constraints apply to the intended guide, knot or storage arrangement, and where are those constraints documented? action
Routing and force transfer Represent how the line is arranged, connected and carrying or awaiting tension.
Route and slack
Trace the working route through guides, contacts, crossings and stored portions.
Working path and obstructions
Distinguish useful free length from length occupied by coils, knots, wraps, snags or inaccessible sections.
- Which ordered contacts and guides define the route, and which crossings are actual entanglements? boundary
- How much slack and free working length are available between the relevant connection points? measurement
Terminations and tension
Record local attachments and the force-transfer configuration of the line.
Connected and loaded segments
Identify knots, splices and fittings and associate tension evidence with the segments it actually describes.
- How is each working end or intermediate attachment secured, and what evidence supports compatibility with this line? provenance
- Which segments are slack or tensioned, and what measured or estimated force applies at each assessed location? measurement
- What connected objects or tensioned segments would move or unload if a selected attachment were released? action
Condition and use decisions Connect inspection evidence and service history to a particular proposed action.
Wear and inspection coverage
Locate observed changes and state what the inspection could establish.
Located condition evidence
Record anomalies by position and distinguish absence of observed damage from evidence of remaining capacity.
- Where are cuts, fraying, flattened areas, stiffness, contamination or other changes, and how extensive are they? measurement
- Which surfaces, interiors, knots and covered sections were examined, and which could not be assessed? boundary
- What is known about prior loading, abrasion, heat, chemical exposure and storage, and what supports that history? provenance
Use limits and interventions
Evaluate a proposed operation against applicable evidence and record the effect of any intervention.
Evidenced action eligibility
Record whether a specific use is supported, unresolved or excluded, including the consequences of cutting or changing terminations.
- Which documented limits and rejection criteria apply to this line's identity, condition, terminations and proposed operation? provenance
- Does the available evidence support the proposed action, or is inspection, replacement or another assessment needed first? action
- If the line is cut, spliced or reterminated, which length, identity, condition and use-limit records must be reassessed? 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.
Kinds and varieties
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Which of these kinds and varieties hold for the sense of line 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.
- Which of these identifiers and schemes hold for the sense of line 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.
- Which of these standards and regulation hold for the sense of line 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.
- Which of these real-world use hold for the sense of line 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.
- Which of these typical measurements hold for the sense of line 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.
- Which of these failure modes and hazards hold for the sense of line 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.
- Which of these regional variation hold for the sense of line 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.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of line this model covers, and on what evidence? provenance
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- noun.artifact
- Plane
- PHY
- Domain
- PHY.OBJ
- Tags
- artifact
- Facets: substance
- material
- Facets: origin
- manufactured
- Facets: agency
- inert
- Facets: mobility
- portable
- Facets: scale
- handheld
- Facets: affordances
- graspable
- Other names and narrower kinds
- agal, apron string, becket, bola, bootlace, bowstring, brace, brail, bungee, bungee cord, cable, candlewick
What it is Filled
A line is a slender, flexible tensile member - built by twisting, braiding, laying, jacketing, or extruding fibres or wires - whose working role is to carry tension, to lash, to hoist, to moor, to tow, or to fish, as distinct from a rigid bar, a flat strap, or a chain of links.
In scope
- The physical extent, ends and continuity of an individual line
- Material and construction relevant to bending, stretching, gripping and wear
- Length, cross-section and changes along the line
- Knots, splices, terminations and local attachments
- Current routing, slack, tension, tangles and contact points
- Condition and evidence supporting a proposed use
Out of scope
- Geometric lines, drawn marks and abstract paths
- Queues, production lines and communication services
- Rigid rods, poles and structural beams
- Fluid conduits whose defining function is carrying a flow
- Electrical or optical cables whose defining function is transmitting power or signals
- Complete lifting, climbing, mooring or restraint systems and their operating procedures
Why it exists Filled
Enable an AI agent to recognise a physical line, assess its condition and arrangement, and determine which handling or load-bearing actions are supported by available evidence.
Distinguishing features Filled
- It is a tangible article with a traceable length and physical cross-section, rather than a geometric line or surface mark.
- Its longitudinal extent substantially exceeds its transverse dimensions; the boundary for short cut pieces remains to be settled.
- It can bend along its length during intended handling, distinguishing it from an article intended to retain a rigid shape.
- Its identity fits a cord-like or rope-like flexible article; a hollow passage, conductive core or broad flat profile requires checking the boundary with hose, cable or strap models.
- An individual line has traceable material continuity, including any joints; several contacting or tangled lines do not automatically constitute one line.
What robots and AI may and may not do Filled
Must not
- Load a line beyond its rated working load or use a damaged line for lifting or life safety.
- Use a line rated for general purposes for climbing, rescue or lifting people.
- Leave lines where people can trip over them or become entangled, or discard fishing line where wildlife can be caught.
- Cut or release a line that is holding a load or a person.
Only with a human decision
- Retiring a line from life-safety service.
- Rigging lines for lifting over people.
May
- Inspect a line and report wear, cuts, kinks, corrosion and rated load.
- Rig, coil and stow lines it is authorized to handle, within their rated limits.
Moral aspects Filled
- A failed line under load can whip back or drop loads onto people.
- Lost fishing and mooring lines entangle and kill marine animals.
Who is affected
- Crews and riggers
- Climbers and rescuers
- Marine wildlife
Owners Filled
Steward
The person or operator who uses it; a competent person inspects lines in lifting or life-safety service.
Links to other meta-models Filled
parent
- oewn-00022119-n - registry parent class
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.line-4
- Open English WordNet: oewn-03676175-n
Direct properties required Filled
- Material and construction: Recorded material; laid, braided, monofilament, other or unknown construction
- Length: m, with measurement method and tension condition
- Cross-sectional dimensions: mm diameter or width and thickness, with position and measurement condition
- Bending behaviour: Observed bend radius in mm under stated conditions; documented minimum bend radius if available
- Extension under load: % extension at a stated force in N, duration and environmental condition
- Continuity and end configuration: Open-ended, closed loop, joined, cut or uncertain; free, knotted, spliced or fitted ends
- Routing and contacts: Ordered endpoints, guides, supports, crossings and contact locations
- Tension distribution: N at a stated segment and time, with measurement or estimation method
- Local condition: Observed fraying, cuts, flattening, stiffness, contamination, discoloration or no visible anomaly; location and inspection coverage
- Documented use limits: Applicable manufacturer information, test evidence or procedure, with configuration and conditions
Recognition required Filled
- A long flexible cord of twisted, braided or jacketed fibres or wires.
- Ends finished with splices, knots, whipping or fittings.
Capabilities and actions required Filled
- Trace, measure and mark the line or a selected segment.
- Coil, uncoil, route or untangle it while accounting for attached ends and tension.
- Tie, untie, splice or terminate it using a method supported for its construction and intended use.
- Attach, pull, tension or release it within evidenced limits for the complete arrangement.
- Inspect and isolate a suspect segment, or remove the line from a proposed use pending assessment.
- Cut it into separately identified pieces after accounting for stored tension and connected objects.
Hazards and failure modes required Filled
- Overloaded or worn lines snap and recoil with dangerous force.
- Abrasion, sunlight and chemicals weaken fibres without visible signs.
- Loose lines can entangle limbs, propellers and animals.
Standards and interfaces required Filled
- ISO 2307, Fibre ropes - Determination of certain physical and mechanical properties, International Organization for Standardization.
Context of use required Filled
- Physical lines are encountered in boating, fishing, construction, lifting equipment and everyday securing tasks.
- They transmit tensile forces to connect, restrain, suspend, tow or retrieve objects.
- Their suitability depends on material, construction, condition, terminations and the requirements of the intended service.
Sources Filled
- ISO 1968: Fibre ropes and cordage - Vocabulary - Specialist terms for rope, cordage, construction, and related line types; basis for the definition and the construction kinds.
- ISO 2307: Fibre ropes - Determination of certain physical and mechanical properties - Measured quantities used on fibre line: diameter, linear density, elongation, and breaking force.
- ISO 9554: Fibre ropes - General specifications - Product classification of fibre ropes by material and construction, and general performance specification.
- CI-1500 Test Methods for Fiber Rope - Industry test methods and the quantities (breaking strength, elongation, linear density) recorded for fibre rope in trade.
- NFPA 1983: Standard on Life Safety Rope and Equipment for Emergency Services - Life-safety rope as a distinct kind; inspection, retirement, and failure practice in rescue and fire service.
- EN 892: Mountaineering equipment - Dynamic mountaineering ropes - Safety requirements and test methods - Dynamic kernmantle climbing rope as a regulated kind, with impact-force and elongation criteria.
- Mooring Equipment Guidelines (MEG4) - Ship mooring and towing lines in steel wire and high-modulus synthetics; snap-back hazard and in-service retirement practice.
- 29 CFR 1926.251 Rigging equipment for material handling - Workplace use and inspection of fibre rope and wire rope as lifting and rigging gear in the United States.
- The Ashley Book of Knots - Traditional English distinction of rope, line, and small stuff, and the working constructions still named in marine practice.
- Rope - Overview of fibre and wire constructions, materials, and the ordinary range of uses against which the specialist sources sit.
- Open English WordNet 2024, synset oewn-03676175-n - sense and gloss of the concept
- Wiktionary: line - word senses and usage
Open questions
- Where does the registry place the boundaries between line, string, thread, wire, cable, strap and hose, especially for articles with multiple functions?
- Does a short offcut retain line identity, and how should closed loops, joined lengths and branches be individuated?
- Which construction-specific inspection methods and rejection criteria can support decisions about condition beyond visible surface observations?
- Which authoritative sources establish use limits for knots, splices, bends, environmental exposure and repeated loading for each identified line product?
- How should an agent assess an unmarked line with unknown service history when its proposed use requires dependable load capacity?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-line-4/spec.json