{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.water-polo","code":"thing-q7707","url":"https://ver.cy/models/thing/q7707/","name":"water polo","alternateNames":["youth water polo"],"kind":"thing","status":"published","version":"0.1.0-research.1","language":"en","classifiers":{"family":"Thing Registry","category":"Activities and processes","entryKind":"thing","plane":"ACT","domain":["ACT.ACT"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"Water polo is a seven-a-side aquatic team sport played in deep water in which two teams score by throwing a buoyant ball into a floating goal while swimming and treading water, under World Aquatics rules that forbid standing on the pool floor, limit each possession with a shot clock, and treat holding an opponent under the surface as a major foul.","purpose":"Enable an AI agent to recognise water polo activity, assess its playing and operational state, and identify actions permitted by the applicable rules and aquatic safety conditions.","scope":{"in":["Recognition of water polo matches, adapted formats and water polo training activities","Team participation, goalkeeper roles, substitutions and temporary exclusions","Ball possession, passing, shooting, goal events and restarts","Playing time, possession time, sanctions and match outcomes under an identified ruleset","Water polo playing-area readiness and immediate conditions for safe participation"],"out":["Pool construction, filtration and facility asset maintenance","Athlete identity, employment, medical records and long-term development","Club governance, league administration and tournament scheduling","Manufacture, procurement and maintenance of balls, caps and goals","General swimming instruction, aquatic rescue procedures and clinical treatment"],"boundaries":[]},"distinguishingFeatures":["Opposing teams contest a ball in water and attack defended goals; a swimming race lacks this possession-and-goal structure.","The activity organises play around throwing, receiving and shooting the ball while moving or maintaining position in water; underwater hockey instead centres on a submerged puck and sticks.","Player roles and rules distinguish goalkeeping from field play; informal pool ball games may lack this distinction.","An organised match uses water-polo-specific possession, foul and restart decisions; swimming with a ball alone is insufficient to identify a match.","A water polo drill can be identified through its explicit relationship to match skills or situations even when it omits opponents, goals or full match timing."],"structure":{"bundles":[{"id":"water-polo-identity","name":"Water polo identity and rule context","description":"Establishes what form of water polo is being represented and which rules give its events meaning.","layers":[{"id":"activity-recognition","name":"Activity recognition","description":"Identifies the activity through aquatic movement, ball play and attacking or defending goals.","findings":[{"id":"recognisable-play-structure","name":"Recognisable play structure","description":"Record the observed features that justify identifying the activity as water polo, including any deliberately omitted match elements.","questions":[{"text":"How do ball handling, movement in water and attacking or defending goals establish this activity as water polo?","id":"recognisable-play-structure-q01","kind":"definition"},{"text":"Is this a match, a water polo drill or an adapted game, and which absent features are intentional?","id":"recognisable-play-structure-q02","kind":"boundary"}]}]},{"id":"governing-play-rules","name":"Governing play rules","description":"Connects the activity to the rules and adaptations needed to interpret it.","findings":[{"id":"ruleset-authority","name":"Ruleset authority","description":"Record the governing rules edition, competition-specific provisions and agreed adaptations without treating one format as universal.","questions":[{"text":"Which rules document and edition govern this activity, and who designated them?","id":"ruleset-authority-q01","kind":"provenance"},{"text":"Which adaptations change player numbers, water depth expectations, ball handling, contact or timing?","id":"ruleset-authority-q02","kind":"boundary"}]}]}]},{"id":"aquatic-playing-readiness","name":"Aquatic playing readiness","description":"Represents the water environment, playing equipment and immediate participation conditions.","layers":[{"id":"pool-goals-and-ball","name":"Pool, goals and ball","description":"Assesses whether the configured water area and equipment support the intended format.","findings":[{"id":"usable-water-polo-field","name":"Usable water polo field","description":"Record playing dimensions, boundaries, goals, ball and required markings against the selected format.","questions":[{"text":"What are the measured playing-area dimensions and depth, and where are the goals and relevant markings?","id":"usable-water-polo-field-q01","kind":"measurement"},{"text":"Which observed equipment or boundary defects must be resolved before this format can start or resume?","id":"usable-water-polo-field-q02","kind":"action"}]}]},{"id":"in-water-participation","name":"In-water participation","description":"Captures immediate readiness for sustained aquatic play and the availability of responsible supervision.","findings":[{"id":"aquatic-readiness-and-distress","name":"Aquatic readiness and distress","description":"Record known participation restrictions, observed difficulty remaining safely in play and the responsible response arrangements.","questions":[{"text":"What evidence establishes that participants can meet this session's swimming and water-support demands?","id":"aquatic-readiness-and-distress-q01","kind":"provenance"},{"text":"What observed distress or environmental condition requires play to stop and responsible personnel to be alerted?","id":"aquatic-readiness-and-distress-q02","kind":"action"}]}]}]},{"id":"teams-roles-and-numbers","name":"Teams, roles and playing numbers","description":"Represents team affiliation, goalkeeping responsibilities and changes in who may be in the water.","layers":[{"id":"field-and-goalkeeper-roles","name":"Field and goalkeeper roles","description":"Identifies participants and the roles relevant to interpreting their actions.","findings":[{"id":"team-and-role-identification","name":"Team and role identification","description":"Record each active participant's team, identifying cap or other designation, role and direction of attack.","questions":[{"text":"How are the two teams and each designated goalkeeper identified during this activity?","id":"team-and-role-identification-q01","kind":"definition"},{"text":"Which ball-handling or playing-area permissions depend on goalkeeper status under the applicable rules?","id":"team-and-role-identification-q02","kind":"boundary"}]}]},{"id":"substitution-and-exclusion","name":"Substitution and exclusion","description":"Tracks numerical strength and conditions governing entry or return to play.","findings":[{"id":"eligible-in-water-lineup","name":"Eligible in-water lineup","description":"Record active players, substitutes and excluded participants, including the conditions that permit a change in availability.","questions":[{"text":"How many eligible players from each team are currently in the water, and what explains any numerical imbalance?","id":"eligible-in-water-lineup-q01","kind":"measurement"},{"text":"Which location, timing, signal or other condition must be satisfied before a substitute or excluded player may enter?","id":"eligible-in-water-lineup-q02","kind":"action"}]}]}]},{"id":"possession-and-goal-creation","name":"Possession and goal creation","description":"Represents control of the ball, movement into scoring positions and the interpretation of shot outcomes.","layers":[{"id":"ball-control-and-pressure","name":"Ball control and pressure","description":"Captures possession and the spatial conditions shaping passing, carrying and defending.","findings":[{"id":"possession-and-playing-options","name":"Possession and playing options","description":"Record ball control, player positions and observable defensive pressure while distinguishing observations from tactical inference.","questions":[{"text":"Which team or player controls the ball, and what observation supports that judgment?","id":"possession-and-playing-options-q01","kind":"provenance"},{"text":"Which passing, movement or shooting options are available given the defenders, boundaries and remaining possession time?","id":"possession-and-playing-options-q02","kind":"action"}]}]},{"id":"shots-and-goal-decisions","name":"Shots and goal decisions","description":"Distinguishes attempts, saves, rebounds and recognised goals.","findings":[{"id":"shot-outcome-and-goal-status","name":"Shot outcome and goal status","description":"Record the observed outcome of a shot separately from the official decision that changes the score.","questions":[{"text":"What distinguishes a shot attempt, save, rebound, out-of-play ball and awarded goal in the governing rules?","id":"shot-outcome-and-goal-status-q01","kind":"definition"},{"text":"What observation and official decision establish whether this attempt changed the score?","id":"shot-outcome-and-goal-status-q02","kind":"provenance"}]}]}]},{"id":"clocks-contact-and-restarts","name":"Clocks, contact and restarts","description":"Represents the temporal and officiating decisions that determine whether and how play proceeds.","layers":[{"id":"game-and-possession-timing","name":"Game and possession timing","description":"Tracks the period, game clock and possession clock where the format uses them.","findings":[{"id":"clock-state-and-expiry","name":"Clock state and expiry","description":"Record clock values, running or stopped status and the events used to start, stop or reset them.","questions":[{"text":"What period and game and possession clock readings apply, and are those clocks running or stopped?","id":"clock-state-and-expiry-q01","kind":"measurement"},{"text":"Which recorded event authorises the next clock start, stop or reset, or establishes that play has ended?","id":"clock-state-and-expiry-q02","kind":"action"}]}]},{"id":"contact-sanctions-and-resumption","name":"Contact, sanctions and resumption","description":"Connects observed incidents to official decisions, participation consequences and the next permitted restart.","findings":[{"id":"incident-decision-and-next-play","name":"Incident decision and next play","description":"Record relevant ball and contact circumstances, the official ruling and any unresolved disagreement before deriving the next action.","questions":[{"text":"What ball-control and contact circumstances were observed, and what foul or sanction did the official actually award?","id":"incident-decision-and-next-play-q01","kind":"provenance"},{"text":"Which team may restart, from where, and with what restrictions on taking the restart or scoring directly?","id":"incident-decision-and-next-play-q02","kind":"action"},{"text":"Which unresolved ruling, player-availability condition or safety interruption prevents resumption?","id":"incident-decision-and-next-play-q03","kind":"boundary"}]}]}]},{"id":"evidence-and-external-alignment","name":"Evidence and external alignment","description":"What the world already says about this thing, gathered so the model can be checked against it.","layers":[{"id":"reported-evidence","name":"Reported evidence","description":"Findings from the breadth pass, kept separate from the structural claims.","findings":[{"id":"evidence-kinds","name":"Kinds and varieties","description":"Reported by the breadth pass; each item needs checking against its source before it becomes normative.","questions":[{"text":"Which of these kinds and varieties hold for the sense of water polo this model covers, and on what evidence?","id":"evidence-kinds-q01","kind":"provenance"}]},{"id":"evidence-identifiers","name":"Identifiers and schemes","description":"Reported by the breadth pass; each item needs checking against its source before it becomes normative.","questions":[{"text":"Which of these identifiers and schemes hold for the sense of water polo this model covers, and on what evidence?","id":"evidence-identifiers-q01","kind":"provenance"}]},{"id":"evidence-standards-and-regulation","name":"Standards and regulation","description":"Reported by the breadth pass; each item needs checking against its source before it becomes normative.","questions":[{"text":"Which of these standards and regulation hold for the sense of water polo this model covers, and on what evidence?","id":"evidence-standards-and-regulation-q01","kind":"provenance"}]},{"id":"evidence-real-world-use","name":"Real-world use","description":"Reported by the breadth pass; each item needs checking against its source before it becomes normative.","questions":[{"text":"Which of these real-world use hold for the sense of water polo this model covers, and on what evidence?","id":"evidence-real-world-use-q01","kind":"provenance"}]},{"id":"evidence-measurements","name":"Typical measurements","description":"Reported by the breadth pass; each item needs checking against its source before it becomes normative.","questions":[{"text":"Which of these typical measurements hold for the sense of water polo this model covers, and on what evidence?","id":"evidence-measurements-q01","kind":"provenance"}]},{"id":"evidence-failure-modes-and-hazards","name":"Failure modes and hazards","description":"Reported by the breadth pass; each item needs checking against its source before it becomes normative.","questions":[{"text":"Which of these failure modes and hazards hold for the sense of water polo this model covers, and on what evidence?","id":"evidence-failure-modes-and-hazards-q01","kind":"provenance"}]},{"id":"evidence-regional-variation","name":"Regional variation","description":"Reported by the breadth pass; each item needs checking against its source before it becomes normative.","questions":[{"text":"Which of these regional variation hold for the sense of water polo this model covers, and on what evidence?","id":"evidence-regional-variation-q01","kind":"provenance"}]},{"id":"evidence-neighbours","name":"Neighbouring kinds and how to tell them apart","description":"Reported by the breadth pass; each item needs checking against its source before it becomes normative.","questions":[{"text":"Which of these neighbouring kinds and how to tell them apart hold for the sense of water polo this model covers, and on what evidence?","id":"evidence-neighbours-q01","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Report matches, results and rules from official federation sources.","Monitor pool safety conditions and alert lifeguards or officials."],"mustNot":["Alter or misstate results or referee decisions.","Assist match fixing or doping.","Leave players in deep water without lifeguard cover in training it supervises.","Publish players' private health or personal data."],"requiresHuman":["Stopping a match for an injured player or unsafe conditions."]},"ethics":{"considerations":["Contact under water is hard to see; referees and rules protect players from foul play and drowning risk."],"affectedParties":["Players","Referees and coaches","Young athletes"]},"owners":{"steward":"The national federation sets local rules; the club or organizer runs each match.","roles":[],"masterSystems":["Federation results records"]},"relations":[{"target":"Q212434","type":"parent","note":"registry parent class"},{"target":"Q216048","type":"parent","note":"registry parent class"},{"target":"Q61065","type":"parent","note":"registry parent class"},{"target":"Q877517","type":"parent","note":"registry parent class"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.water-polo","Wikidata: Q7707 (https://www.wikidata.org/wiki/Q7707)"]},"properties":{"applicability":"not-applicable","items":["Activity form: match | scrimmage | drill | adapted game","Applicable rules and adaptations: Governing ruleset, edition, competition conditions and declared local adaptations","Aquatic playing configuration: Playing-area length, width and depth in metres; goal dimensions in metres","Player role and availability: Field player | goalkeeper; active | substitute | temporarily excluded | unavailable","Possession: Team in control | contested | no established control | uncertain","Match phase: Pre-start | live play | stopped | interval | suspended | finished","Clock readings: Period identifier and remaining game and possession time in seconds, where applicable","Recognised score: Goals awarded to each team","Sanction and restart status: Recorded decision, affected participant, restart entitlement and unmet conditions","Participation readiness: Ready | restricted | stop required | not established, with supporting observations"]},"recognition":{"applicability":"optional","items":["Two teams in numbered caps with ear guards in a deep pool.","Floating goals at each end and a yellow ball."]},"capabilities":{"applicability":"required","items":["Classify an observed activity as a water polo match, practice or declared adaptation.","Reconstruct possession, score, clocks and participant availability from observations and official decisions.","Identify candidate legal restarts, substitutions and re-entry actions under the recorded ruleset.","Assess attacking and defensive options using player distribution, possession and time remaining.","Flag conflicting evidence or missing conditions that prevent a reliable state judgment.","Recommend pausing activity and alerting the responsible official or safety personnel when readiness conditions fail."]},"hazards":{"applicability":"required","items":["Head and face injuries from contact and the ball.","Near-drowning from holding under water."]},"interfaces":{"applicability":"required","items":["Water Polo Rules, World Aquatics."]},"context":{"applicability":"required","items":["Water polo is played in swimming pools equipped for team competition and supervised aquatic training.","Schools, clubs and competitive teams use it for recreation, fitness, skill development and organised matches."]}},"sources":[{"title":"Water Polo Rules / Competition Regulations, World Aquatics (formerly FINA)","url":"https://www.worldaquatics.com/water-polo","note":"Field dimensions, period and shot-clock timing, squad size, foul and exclusion regime, ball and goal specifications, and the distinction between pool and beach water polo."},{"title":"Water polo, Olympic sport pages, International Olympic Committee","url":"https://www.olympics.com/en/sports/water-polo/","note":"Olympic status (men from 1900, women from 2000), international competitive use, and the IOC sport identity of the game."},{"title":"Water polo, Wikipedia, Wikimedia Foundation","url":"https://en.wikipedia.org/wiki/Water_polo","note":"Common naming across languages, historical outline, typical pool and equipment figures, and the neighbouring aquatic games against which water polo is distinguished."},{"title":"Men's and Women's Water Polo Rules, National Collegiate Athletic Association","url":"","note":"The United States collegiate rule set as a living regional variant of the World Aquatics game (substitution, timeouts, and match administration)."},{"title":"Wikidata item Q7707: water polo","url":"https://www.wikidata.org/wiki/Q7707","note":"identity and sense of the item"}],"openQuestions":["Does an existing Vercy world model already own water polo or a broader concept that should supply its authoritative publication?","Which governing rules editions and competition formats should be supported, particularly where player numbers, clocks, exclusions and restart permissions differ?","Which adapted forms, including shallow-water and reduced-team activities, belong within this registry entry?","What evidence and responsible authority establish participation readiness and stop-play conditions for each intended setting?","How should conflicting video observations, clock displays and official decisions be reconciled while preserving uncertainty and later corrections?"],"resources":{"spec":"/models/things/publications/thing-q7707/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q7707/spec.json"],"providers":["Codex","Grok"],"researchStatus":"unreviewed","generatedAt":"2026-09-07T11:15:20Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"not-applicable","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-07T10:10:32+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass","interaction.properties":"Plane ACT: no invented physical properties."},"score":1.0}}