defender
Enable an agent to recognise a defender role in team sport, assess its assigned defensive responsibilities and readiness, and identify suitable deployment or development actions.
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 defender role in team sport, assess its assigned defensive responsibilities and readiness, and identify suitable deployment or development actions.
A defender is a person acting in a role of protecting a person, group, place, interest or position against attack, harm or challenge, with more specific meanings in sport, law and advocacy.
It can be Resolve a defender label against a named sport and tactical assignment.; Assign or review responsibility for an opponent, zone or threat during a specified phase.; Compare deployment requirements with recorded competences and restrictions.; Review defensive decisions using opportunities, positioning and team context.; Identify training needs in marking, anticipation, intervention or defensive coordination.; Flag ambiguous assignments and unsupported performance conclusions for human review..
Distinguishing features
The role must be interpreted within a named sport; a position label alone does not establish its responsibilities.
Its assigned emphasis is protecting scoring opportunities or restricting threatening progression, rather than merely occupying a rearward location.
An attacker temporarily defending does not automatically become a defender; distinguish an immediate action from an assigned position or sustained role.
A defender assignment identifies what a player is expected to do, whereas the player remains a separate person who may hold different assignments.
Goalkeeping must be distinguished where the sport grants that position different rules, equipment or handling privileges.
Scope
+ Sport-specific meaning and boundaries of the defender role
+ Defensive positions, zones, opponents and threats assigned to the role
+ Responsibilities during opposition possession, turnovers and restarts
+ Defensive competences and evidence of performance
+ Assignment, eligibility and readiness for a particular defensive deployment
- The identity, biography and complete health record of a person holding the role
- The team's complete tactical system and organisation
- Goalkeeper-specific responsibilities and privileges
- Complete match records and competition administration
- Legal defenders, military defenders, security personnel and advocacy roles
- Employment contracts and recruitment advertisements
Characteristics
- Sport and rules context
- Named sport, format, competition and applicable rules edition Determines what defending means and which interventions are permitted.
- Defender designation
- Position or role label used by the relevant sport and team Prevents labels from different sports or tactical systems being treated as interchangeable.
- Assignment basis
- Declared playing position, coached tactical assignment or inferred observed role Separates explicit responsibility from an analyst's interpretation.
- Protection responsibility
- Assigned scoring area, space, opponent or progression route, qualified by phase Makes the defensive obligation concrete enough to assess.
- Marking responsibility
- Opponent-oriented, zone-oriented, mixed, situational or unspecified Clarifies when to follow an opponent, protect space or transfer responsibility.
- Phase-specific duty
- Responsibilities during settled defence, transition, possession and applicable restarts A defender's obligations can change when possession or play conditions change.
- Deployment readiness
- Ready, restricted, unavailable or unassessed for a named assignment Connects capability and availability evidence to a particular deployment.
- Defensive intervention outcome
- Counts or proportions of sport-defined outcomes, with opportunity denominator and observation period Supports assessment without confusing frequent interventions with effective defending.
- Coordination dependency
- Cover, handoff and communication relationships with teammates Many defensive decisions depend on another player's position and responsibility.
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.defender-person
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 5 bundles · 9 layers · 14 findings · 23 questions.
Defender role boundaries Establishes which sporting sense and level of defensive assignment the entry represents.
The name is ambiguous, and defensive participation alone does not establish a defender role.
Sport-specific meaning
Anchors the defender designation to the sport in which it is used.
Defender sense
Record the intended sport and supporting registry provenance before treating this provisional interpretation as settled.
- Which sport or source concept does vr.tr.defender designate? definition
- What original registry record or external identifier establishes that sense? provenance
Position and assignment
Separates an enduring position label from a temporary defensive task.
Assignment status
Identify whether defender denotes a declared position, a tactical assignment or an interpretation of observed play.
- What makes this assignment a defender role rather than an attacking player performing a defensive action? boundary
- Who assigned or inferred the role, and for which match, interval or phase does it apply? provenance
Threats and defensive responsibility Describes what the defender must protect and how responsibility changes during play.
A defender cannot be evaluated meaningfully without knowing which threats and spaces were assigned.
Protection and marking
Records the opponents, areas and routes the defender is expected to control.
Assigned threat control
Make marking and protection duties explicit, including priorities when threats compete.
- Which opponent, area or progression route is the defender responsible for in this situation? definition
- When following an opponent would expose a protected area, which responsibility takes priority? action
Phase changes and cover
Captures transition duties and coordinated transfers of defensive responsibility.
Defensive duty transitions
Specify how the defender responds to possession changes, teammate movement and applicable restarts.
- After a turnover, what determines whether the defender pressures, delays, tracks an opponent or recovers space? action
- Which teammate provides cover, and what cue transfers marking responsibility? action
Permitted interventions and readiness Connects defensive actions to the rules and capabilities needed for the assignment.
An effective defensive intention can still produce an impermissible action or exceed a player's assessed capability.
Defensive action boundaries
Identifies the sport-specific limits on challenging opponents and preventing progression.
Lawful defensive options
Record permitted intervention types and relevant restrictions without transferring assumptions between sports.
- Which forms of interception, blocking, tackling or contact are permitted under the applicable rules? boundary
- Which authoritative rule passages support these limits, including any position-specific exceptions? provenance
Assignment fit
Assesses whether a prospective role holder can fulfil the specified defensive duties.
Defender deployment evidence
Relate anticipation, positioning, intervention technique and communication evidence to the proposed assignment.
- What observed evidence shows that the player can perform the marking, recovery and coordination duties required here? measurement
- Which eligibility, availability or assessed capability restrictions affect this deployment? action
Defensive performance and development Supports contextual assessment and targeted improvement of defensive play.
Visible interventions capture only part of defending, and outcomes depend on exposure and team support.
Contextual performance evidence
Relates defensive outcomes to opportunities, positioning and assigned responsibilities.
Defensive contribution assessment
Evaluate both direct interventions and prevention of threats while recording uncertainty in attribution.
- Which observable outcomes indicate that the defender fulfilled the assigned duty, and over how many relevant opportunities? measurement
- What evidence distinguishes the defender's contribution from teammate cover, opponent error or limited exposure? boundary
- How will effective positioning that prevents an attempted attack be assessed when no intervention is recorded? measurement
Review and improvement
Turns supported observations into changes to training or defensive assignment.
Defensive development decisions
Identify whether a recurring problem calls for skill development, clearer coordination or a revised assignment.
- Does the observed difficulty concern anticipation, technique, recovery, communication or an unclear tactical instruction? definition
- What training or assignment change follows from the evidence, and what observation would show improvement? 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.
- No sense is recorded, and the batch contains another entry named defender; the intended referent must be checked before choosing a specialised model.
- This description provisionally covers the general human role, not specifically an association-football position or a legal occupation.
- The listed kinds are distinct usages of the word, not a verified classification; no sources were consulted.
- Which of these check these first hold for the sense of defender this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Sports defender
- Legal defender
- Human rights defender
- Military defender
- Which of these kinds and varieties hold for the sense of defender this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Assigning defensive responsibilities to players in team sports.
- Describing a person who represents an accused person in legal proceedings.
- Describing people who promote and protect human rights.
- Describing people protecting a place or population against attack.
- Which of these real-world use hold for the sense of defender 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.
- Conflating a defensive role with the person who temporarily holds it.
- Assuming that every defender is a licensed professional or holds a formal occupation.
- Transferring duties, qualifications or performance measures between unrelated senses of the word.
- Which of these failure modes and hazards hold for the sense of defender this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- Legal titles, qualifications and arrangements for public defence vary by jurisdiction.
- Sports usage depends on the sport and local terminology; a defender may occupy a named position or perform a temporary tactical role.
- Which of these regional variation hold for the sense of defender 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.
- defendant - A defendant is the party against whom proceedings are brought; a defender may represent or protect that party.
- defence lawyer - A defence lawyer is a legal professional representing the defence; the broader term defender does not establish legal qualifications.
- advocate - An advocate supports a person or cause; a defender specifically responds to or guards against a threat or challenge, although the roles can overlap.
- attacker - An attacker initiates an offensive action, while a defender resists or prevents it; these roles may change during an interaction.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of defender this model covers, and on what evidence? provenance
What the second pass must settle
- Does vr.tr.defender denote a sports role, a defender in a particular sport, or another social role entirely?
- What source identifiers distinguish this entry from the other defender entry in the batch?
- Does an existing Vercy world model already cover the intended concept, requiring a link rather than a separate publication?
- Which position variants and goalkeeper boundaries belong to the intended registry granularity?
- Which authoritative sport sources and assessment methods can substantiate the role's duties, permitted interventions and performance criteria?