waist
Enable an agent to identify a person's waist, record its shape and measurement context, and support appropriate comparison, clothing fit and observation.
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.
recalled by Codex without web access - no source was read
Researched by: Codex
Purpose and description
Enable an agent to identify a person's waist, record its shape and measurement context, and support appropriate comparison, clothing fit and observation.
The waist is the region of the human trunk between the lower ribs and the pelvis, commonly identified externally by a narrowing of the torso.
It can be Locate and annotate the waist using an explicit landmark convention.; Guide a consented circumference measurement using a selected protocol.; Compare observations when their landmarks and conditions are compatible.; Relate body measurements to a garment's stated fit requirements without equating body and garment dimensions.; Record wearer-reported pressure, slipping or movement restriction at the waist.; Flag ambiguous boundaries or incompatible measurements for clarification..
Distinguishing features
Refers to a torso region on a person, rather than the band or seam of a garment surrounding it.
Occupies the transition between the rib cage and hips; it does not denote the whole abdomen or the pelvis.
Denotes a region whose circumference can be measured, rather than a circumference value or clothing size itself.
Can be identified using stated anatomical landmarks even when the torso has no conspicuous inward narrowing.
Does not assume that the navel, a trouser waistband and a protocol-defined waist measurement level coincide.
Scope
+ Identification and boundaries of the anatomical waist region
+ External waist contour and variation with posture
+ Waist measurements with their protocols and observation conditions
+ Changes in waist dimensions across comparable observations
+ Location and fit of clothing or equipment around the waist
- Garment waistbands, garment dimensions and labelled clothing sizes as independent objects
- The abdomen, pelvis, spine and internal organs as anatomical structures
- Body composition, diseases and clinical risk classifications
- Whole-body anthropometry and general sizing systems
- Narrow portions of tools, vessels or other objects also called waists
Characteristics
- Subject association
- Person whose waist is observed Associates observations with the correct body without treating the waist as a detached object.
- Boundary convention
- Named anatomical or measurement convention; explicitly described convention; unspecified Different uses of waist may select different portions or levels of the torso.
- Measurement landmarks
- Identified landmarks and the measurement level relative to them Allows another observer to locate the intended measurement path.
- Waist circumference
- cm or mm, accompanied by protocol and observation conditions Supports fit and comparison only when the measured level and method are known.
- Waist contour
- Described or captured external profile at a stated posture and level; indeterminate Bodies with similar circumferences can have different profiles and clothing contact patterns.
- Observation posture
- Standing, seated, lying or other described posture; torso position recorded Posture affects the observed contour and comparability of measurements.
- Breathing and muscle condition
- Protocol-specified breathing phase and abdominal relaxation or contraction; unknown Changes in these conditions can alter the measured circumference.
- Clothing or equipment placement
- Item and its position relative to the identified waist level Distinguishes anatomical location from the location selected for wearing an item.
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 5 bundles · 9 layers · 15 findings · 23 questions.
Waist identity and boundaries Establishes which sense of waist is intended and where the region is located on the body.
Waist can name an anatomical region, a clothing feature or an object's narrowing, and the registry supplies no definition.
Anatomical sense
Identifies the waist as a region belonging to a human torso.
Body region referent
The draft selects the human anatomical sense; registry provenance must confirm that selection.
- Does the registry source identify waist as a human body region? provenance
- Is the observed referent the person's waist, a garment feature or another object's narrowed section? boundary
Regional landmarks
Separates the waist region from the particular line selected for measurement or clothing placement.
Waist location convention
A record should identify its location convention rather than assume visible narrowing, navel level and waistband position are equivalent.
- Which anatomical landmarks or external contour features locate the waist in this use? definition
- Does the identified waist describe a region or a specific cross-sectional level? boundary
Waist measurement Makes circumference observations interpretable and repeatable.
A waist value without its measurement level and conditions can mislead fit decisions and comparisons.
Circumference protocol
Records how the path around the torso was selected and measured.
Located circumference
Each circumference observation needs units, a measurement level and an identified method.
- What circumference was measured, in which units and at which landmark-defined level? measurement
- Which documented protocol or explicitly described method governed the measurement? provenance
Measurement conditions
Captures body state and measurement contact that affect the observed value.
Repeatable observation conditions
Posture, breathing, abdominal contraction, clothing and tape contact need sufficient description to judge repeatability.
- What posture, breathing phase and abdominal muscle condition applied during measurement? measurement
- Was measurement taken over clothing, and how were tape alignment and tissue compression controlled? measurement
Waist contour and change Describes external shape and distinguishes observed variation from differences in measurement conditions.
Circumference alone does not describe waist shape, and an apparent change may reflect a changed method or posture.
External profile
Represents waist contour without requiring an hourglass shape or a visible minimum circumference.
Contour without assumed narrowing
The waist remains a locatable region when visible indentation is slight or absent; contour descriptions should state viewpoint and posture.
- Is a visible narrowing present, and from which viewpoint and posture was it observed? measurement
- If no narrowing is visible, which landmark convention identifies the waist? boundary
Comparison over time
Supports comparisons that preserve the meaning of each waist observation.
Comparable waist observations
Recorded differences should be interpreted in light of measurement level, method, body state and uncertainty, without assigning an unsupported cause.
- Were the observations made at equivalent waist levels using compatible methods and conditions? measurement
- Is the difference sufficiently supported to report as change, or should measurement be repeated? action
Waist wearable interface Relates the anatomical waist to garments, belts and equipment worn around the torso.
Wearable placement can differ from anatomical waist location, and fit depends on more than a labelled size.
Wearing level
Identifies where an item sits relative to the waist and where its relevant body measurement should be taken.
Body-to-item location
A garment or belt may sit above, at or below the selected waist level; its placement must remain distinct from the anatomical definition.
- Where does the item's contact band sit relative to the identified anatomical waist? boundary
- Does the item's sizing guidance require circumference at the anatomical waist or at its intended wearing level? measurement
Contact and movement
Records how an item interacts with the waist during its intended use.
Waist fit observation
Fit observations connect wearer feedback and item behaviour to posture and activity, while leaving equipment certification and clinical assessment to their own models.
- Does the wearer report pressure or restricted movement, or does the item slip, while sitting, bending or performing the intended activity? measurement
- Which placement or fit adjustment is supported by the item's instructions and the wearer's preference? 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.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- The anatomical human-body sense is assumed because no sense was recorded; the word also describes narrowed portions of objects.
- The waist is a descriptive body region, not a separate organ or discrete skeletal structure.
- Confirm the intended measurement protocol before assigning landmarks, reference ranges or health-related thresholds.
- Which of these check these first hold for the sense of waist this model covers, and on what evidence? provenance
Standards and regulation
Recalled without web access and unsourced; every item is a lead to verify.
- ISO 8559-1, issued by the International Organization for Standardization, defines anthropometric measurements used for clothing sizing.
- Which of these standards and regulation hold for the sense of waist this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Locating garment waistlines and fitting trousers, skirts, belts and other clothing.
- Measuring body dimensions in anthropometry.
- Using waist circumference and ratios involving it to assess body-fat distribution.
- Which of these real-world use hold for the sense of waist this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Waist circumference - Varies with age, body size, body composition and measurement protocol; no single range applies to all people. - cm
- Waist-to-hip ratio - Population-dependent; calculated by dividing waist circumference by hip circumference. - dimensionless
- Which of these typical measurements hold for the sense of waist 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.
- Different anatomical measurement sites can produce non-comparable waist measurements.
- Tape tension, clothing, posture and breathing can affect circumference measurements.
- The visible narrowest point may be indistinct and should not be assumed to match every measurement protocol.
- Which of these failure modes and hazards hold for the sense of waist this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- Clothing markets use centimetres or inches for waist sizing, and nominal garment sizes may differ from measured body circumference.
- Which of these regional variation hold for the sense of waist 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.
- abdomen - The abdomen is a broader anatomical region; the waist describes a localized region around the trunk rather than the abdominal cavity or its contents.
- hip - The hip region lies lower, around the pelvis and proximal thigh; hip circumference is a separate measurement.
- waistline - A waistline is a reference line around the body or a garment feature whose position can differ from the anatomical waist.
- waist circumference - Waist circumference is a measured quantity, whereas the waist is the body region being measured.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of waist this model covers, and on what evidence? provenance
What the second pass must settle
- Does the registry provenance confirm the human anatomical sense, and does an existing Vercy model already own this concept?
- Which authoritative anatomical descriptions should establish the waist region's boundaries without conflating them with a measurement line?
- Which anthropometric and apparel measurement protocols should be supported, and under what conditions are their results comparable?
- What measurement adaptations are documented for people whose posture, mobility or body contour makes standard landmark identification difficult?
- What repeatability evidence is needed to distinguish a meaningful circumference change from measurement variation?