javelin throw
Enable an agent to recognise a javelin-throw activity, assess its performance and adjudication state, and identify what evidence or conditions are needed before further action.
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 recognise a javelin-throw activity, assess its performance and adjudication state, and identify what evidence or conditions are needed before further action.
Javelin throw is a track-and-field throwing event in which an athlete throws a spear-shaped implement with one hand over the shoulder or upper arm from a runway, aiming for the greatest distance achieved within the event's validity rules.
It can be Classify an observed activity as a competition attempt, javelin drill or adapted form.; Associate an attempt with its athlete, implement, throwing area and applicable rule profile.; Identify missing observations needed to decide validity or establish a measured result.; Compare attempts using distance, approach configuration and release observations.; Flag unresolved throwing-area clearance or retrieval status for the responsible person.; Explain an attempt's recorded outcome using adjudication grounds and supporting evidence..
Distinguishing features
The activity uses a javelin or an explicitly identified adapted equivalent, rather than a shot, discus, hammer or generic throwing object.
The intended performance is a distance throw within a designated throwing area, rather than penetration of a target or striking an opponent.
The observed or intended delivery belongs to javelin throwing; an unconventional throw must be identified separately from whether it qualifies under the applicable rules.
A competitive attempt requires separate judgements about delivery, boundary conduct and landing, so distance alone does not establish a valid result.
Standing throws and shortened approaches can be javelin training instances without constituting complete competition attempts.
Scope
+ Identification of competitive, training and adapted javelin-throw activities
+ Attempt progression from preparation and approach through delivery and recovery
+ The relationship between release, javelin flight and first ground contact
+ Attempt validity, distance measurement and adjudication evidence
+ Javelin-specific readiness of the throwing area and retrieval sequence
- Manufacture, certification and maintenance of the javelin as a physical implement
- An athlete's complete biography, health record or training programme
- Whole-meet scheduling, administration and standings across other disciplines
- Venue construction and general facility management
- Spear use in hunting, warfare or historical reenactment
Characteristics
- Activity context
- competition | training | demonstration | adapted activity Determines whether competition adjudication, a coaching objective or an adaptation governs interpretation.
- Applicable rule profile
- Governing organisation, rule edition, event category and local modifications Prevents an agent from applying eligibility, implement or attempt requirements from the wrong context.
- Implement used
- Linked implement record, including declared specification and verification status Connects an attempt to the equipment whose suitability must be assessed for that activity.
- Attempt phase
- preparation | approach | delivery | flight | landed | adjudication | complete | aborted Makes observations and permitted next actions depend on the actual stage of the throw.
- Approach configuration
- standing | shortened approach | full approach | adapted configuration Distinguishes training constraints and adaptations when comparing execution or distance.
- Release observations
- Speed in m/s, release angle in degrees and release height in m, each with method and uncertainty Supports analysis of delivery without treating distance as a complete account of execution.
- Attempt adjudication
- pending | valid | foul | aborted | disputed, with recorded grounds Separates observed performance from its acceptance as a competition result.
- Throw distance
- m, with measurement reference, precision and official or estimated status Allows comparison while preserving the distinction between an official mark and a training estimate.
- Throwing-area clearance
- unknown | not clear | confirmed clear | retrieval authorised Supports coordination of throwing and retrieval without interpreting missing information as clearance.
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 6 bundles · 11 layers · 19 findings · 29 questions.
Discipline and rule context Establishes which form of javelin throw is being represented and what governs its interpretation.
Competition throws, drills and adapted activities share a discipline but do not necessarily share attempt requirements.
Activity identity
Locates the activity within javelin throwing and distinguishes its purpose.
Javelin-throw instance
Record the intended activity and observed throwing task, including whether it is a complete attempt or a constrained drill.
- What makes this activity an instance of javelin throw rather than another projectile activity? definition
- Is this a competition attempt, a standing or shortened-approach drill, or an adapted form? boundary
Governing context
Connects the activity to the applicable rules and participation category.
Rule profile selection
Record the authority and edition used to interpret the attempt, including explicit modifications.
- Which governing rules, edition and event category apply to this throw? provenance
- Which local or adaptation provisions change the implement, delivery or adjudication requirements? boundary
Implement and throwing area Captures the equipment and spatial conditions that make a javelin attempt interpretable.
Implement suitability and the relationship between approach, throwing boundary and landing area affect both eligibility and outcome.
Implement match
Relates the javelin actually used to the requirements of the activity.
Javelin suitability
Identify the implement and the evidence supporting its suitability for this category or drill.
- Which javelin was used, and what specification is required for this activity? definition
- What inspection, measurement or certification supports its accepted status? provenance
Throwing geometry
Identifies the spatial references needed to interpret approach, release and landing.
Area and reference markings
Record the relevant approach space, throwing boundary and landing-sector markings with their verification status.
- Which markings define the permitted approach, throwing boundary and landing sector for this attempt? boundary
- How were the area geometry and measurement reference points verified? measurement
Delivery and flight Describes the execution of a throw and the observable transition from athlete motion to javelin flight.
Distance alone cannot distinguish approach choices, release conditions and flight behaviour.
Approach and delivery
Represents the movement sequence leading to release.
Execution sequence
Record approach configuration, carry and withdrawal, transition steps and delivery where applicable to the observed form.
- Which approach and delivery phases were performed, omitted or deliberately constrained? definition
- What observations establish the timing of the final support contacts and release? measurement
Release and flight observation
Separates measured release conditions from interpretations of flight.
Release and flight evidence
Record available release measurements and flight observations without assuming a universal optimal release angle.
- Which release speed, angle, height and javelin-orientation measurements are available, and with what uncertainty? measurement
- What evidence supports attributing the observed flight to release conditions, wind or implement behaviour? provenance
Validity and result Connects delivery, landing and boundary observations to the adjudicated result.
A long throw can lack a valid mark, and a measured distance requires an identifiable landing point and measurement procedure.
Attempt adjudication
Preserves separate grounds for accepting or rejecting an attempt.
Validity evidence
Record relevant delivery conduct, boundary contacts, exit conduct and first ground contact alongside the decision.
- What evidence establishes compliance or infringement for delivery, boundary conduct and landing under the selected rules? boundary
- Who made the decision, and which observation or rule remains disputed? provenance
Distance and comparison
Makes measured marks traceable and comparisons explicit.
Accepted distance
Record the measured mark, its reference points and its status before using it in a performance comparison.
- Which landing mark and throwing reference were used, with what instrument and reporting precision? measurement
- Which attempts are comparable given their validity, implement category and approach configuration? boundary
Throw and retrieval control Represents the coordinated sequence of preparing, releasing and retrieving javelins.
Javelin flight and retrieval share physical space, so an agent needs explicit clearance and responsibility information.
Release readiness
Tracks whether the designated throwing area is ready for an attempt.
Clearance before throw
Record clearance observations and the responsible person's release authorisation without inferring readiness from silence.
- Who confirms that the landing area and relevant surrounding space are clear before this throw? provenance
- Which unresolved clearance or visibility condition requires the attempt to remain on hold? action
Landing and retrieval
Coordinates post-landing measurement and retrieval with subsequent attempts.
Retrieval transition
Record when landing assessment and measurement permit retrieval, and when the area becomes available again.
- What signal and responsible person authorise entry for measurement or retrieval? action
- What confirmation is required before another javelin may be thrown? 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.
- This describes the modern athletics event, not ancient javelin contests or general spear throwing.
- The stated implement masses refer to standard senior categories; age-group and para-athletics specifications require category-specific verification.
- Rule names and broad requirements are recalled without source consultation; exact technical specifications and current rule wording should be checked before competition use.
- Which of these check these first hold for the sense of javelin throw this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Men's javelin throw
- Women's javelin throw
- Age-group javelin throw with specified implement weights
- Standing para-athletics javelin throw
- Seated para-athletics javelin throw
- Which of these kinds and varieties hold for the sense of javelin throw this model covers, and on what evidence? provenance
Identifiers and schemes
Recalled without web access and unsourced; every item is a lead to verify.
- Athletics event abbreviation - JT - Common abbreviation for javelin throw in athletics results and event listings; it does not identify a particular competition or athlete.
- Which of these identifiers and schemes hold for the sense of javelin throw this model covers, and on what evidence? provenance
Standards and regulation
Recalled without web access and unsourced; every item is a lead to verify.
- World Athletics Competition and Technical Rules govern implement specifications, runway and sector geometry, throwing technique, valid trials and measurement.
- World Para Athletics Rules and Regulations provide classification-dependent requirements, including provisions for seated throwing.
- Which of these standards and regulation hold for the sense of javelin throw this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Contested as an individual athletics event at the Olympic Games and other international, national and local competitions.
- Forms part of the men's decathlon and women's heptathlon.
- Practised in school, club and university athletics.
- Contested in para-athletics under applicable sport-class rules.
- Which of these real-world use hold for the sense of javelin throw this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Senior men's standard implement nominal mass - 800 - g
- Senior women's standard implement nominal mass - 600 - g
- Throw distance - Varies substantially with athlete, implement and competition category - m
- Which of these typical measurements hold for the sense of javelin throw 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.
- A throw is invalid if the javelin's metal head does not strike the ground before any other part of the implement.
- Landing outside the prescribed sector invalidates the attempt.
- Crossing the throwing boundary or leaving the runway improperly can invalidate the attempt.
- A thrown javelin can cause severe penetrating injury to officials, athletes or bystanders if the landing area is not controlled.
- Repeated high-force throwing can injure the shoulder, elbow or back.
- Which of these failure modes and hazards hold for the sense of javelin throw this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- School and youth programmes may use different implement weights or modified introductory implements under their governing rules.
- Availability in school competitions varies with local facility, supervision and safety requirements.
- Which of these regional variation hold for the sense of javelin throw 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.
- Javelin - The javelin is the physical implement; javelin throw is the athletic activity and event.
- Spear throwing - Spear throwing includes hunting, warfare and other practices; javelin throw here denotes the regulated athletics event.
- Discus throw - Discus throw uses a disc released from a throwing circle rather than a spear-shaped implement thrown from a runway.
- Shot put - Shot put requires putting a spherical implement from the shoulder, rather than throwing a javelin over the shoulder or upper arm.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of javelin throw this model covers, and on what evidence? provenance
What the second pass must settle
- Does an existing Vercy world model already cover javelin throw, requiring this registry entry to link to it instead of creating a separate publication?
- Which authoritative rule editions and category-specific provisions should anchor implement suitability, attempt validity and distance measurement?
- Which adapted forms belong within this registry entry, and which require relations to separately registered disciplines?
- Which biomechanical observation methods provide sufficient reliability for useful comparisons outside instrumented competition or research settings?
- Which authoritative operational guidance should define throwing-area clearance, stop signals and retrieval responsibilities across training and competition settings?