{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.pressure","code":"thing-pressure","url":"https://ver.cy/models/thing/pressure/","name":"pressure","alternateNames":["acoustic radiation pressure","atmospheric pressure","air pressure","gas pressure","pressure level","force per unit area","barometric pressure","compartment pressure","overpressure","sea-level pressure","hydrostatic head","intraocular pressure"],"kind":"thing","status":"published","version":"0.2.0-wave.1","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"noun.phenomenon","plane":"PHY","domain":["PHY.FLW"],"industry":[],"navPath":"","tags":[],"facets":{"substance":"energy","origin":"natural","agency":"inert","mobility":"not-applicable","scale":"not-applicable","affordances":["observable"]}},"whatItIs":"The force applied per unit area of a surface, measured in pascals; examples include atmospheric pressure, gas pressure, blood pressure and acoustic pressure.","purpose":"Let an agent handle pressure with units, an absolute, gauge or differential reference and context, and avoid unit and reference confusion.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Force per area, a scalar","Absolute, gauge and differential references","Many units in use","Blood pressure uses mmHg by convention"],"structure":{"bundles":[{"id":"value","name":"Value","description":"How much.","layers":[{"id":"unit","name":"Unit","description":"Pa, bar, psi.","findings":[{"id":"unit-finding","name":"Unit","description":"Unit used.","questions":[{"text":"In which unit is the pressure given?","kind":"definition"},{"text":"What is it in pascals?","kind":"measurement"}]}]},{"id":"reference","name":"Reference","description":"Absolute or gauge.","findings":[{"id":"reference-finding","name":"Reference","description":"Reference type.","questions":[{"text":"Is it absolute, gauge or differential?","kind":"boundary"},{"text":"Relative to what?","kind":"definition"}]}]}]},{"id":"measurement","name":"Measurement","description":"Instruments.","layers":[{"id":"instrument","name":"Instrument","description":"Gauge type.","findings":[{"id":"instrument-finding","name":"Instrument","description":"Instrument used.","questions":[{"text":"Which instrument measured it?","kind":"provenance"},{"text":"Is it calibrated?","kind":"provenance"}]}]},{"id":"conditions","name":"Conditions","description":"Temperature and altitude.","findings":[{"id":"conditions-finding","name":"Conditions","description":"Measurement conditions.","questions":[{"text":"At what temperature and altitude?","kind":"measurement"},{"text":"Was sea-level correction applied?","kind":"boundary"}]}]}]},{"id":"engineering","name":"Engineering","description":"Pressure equipment.","layers":[{"id":"rating","name":"Rating","description":"Maximum allowable pressure.","findings":[{"id":"rating-finding","name":"Rating","description":"Pressure rating.","questions":[{"text":"What is the maximum allowable pressure?","kind":"measurement"},{"text":"Is the equipment certified?","kind":"provenance"}]}]},{"id":"safety","name":"Safety","description":"Relief and inspection.","findings":[{"id":"safety-finding","name":"Safety","description":"Safety devices.","questions":[{"text":"Which relief devices protect it?","kind":"definition"},{"text":"When was it last inspected?","kind":"provenance"}]}]}]},{"id":"contexts","name":"Contexts","description":"Weather and health.","layers":[{"id":"weather","name":"Weather","description":"Barometric pressure.","findings":[{"id":"weather-finding","name":"Weather","description":"Barometric reading.","questions":[{"text":"What is the sea-level pressure, and what does it indicate?","kind":"measurement"},{"text":"How is it changing?","kind":"measurement"}]}]},{"id":"health","name":"Blood pressure","description":"Health context.","findings":[{"id":"health-finding","name":"Health","description":"Blood pressure information.","questions":[{"text":"What does official guidance say about this blood pressure reading?","kind":"provenance"},{"text":"When should someone see a clinician?","kind":"action"}]}]}]}]},"agentConduct":{"may":["Measure and report pressure with units and calibration status.","Monitor pressure in systems it is authorized to supervise and alert on limits."],"mustNot":["Exceed rated pressure of vessels, pipes or tyres.","Disable relief valves or pressure alarms.","Interpret a person's blood pressure as a diagnosis.","Report pressure without identifying whether it is absolute, gauge or differential and specifying the relevant reference or compared locations."],"requiresHuman":["Isolating or venting pressurised systems requires human review."]},"ethics":{"considerations":["Pressure failures cause explosions and injuries.","Blood pressure readings guide medical care and need professional interpretation."],"affectedParties":["Workers near pressure systems","Patients"]},"owners":{"steward":"Nobody: a physical quantity; owners answer for their pressure equipment.","roles":[],"masterSystems":[]},"relations":[{"target":"oewn-11439518-n","type":"parent","note":"registry parent class"},{"target":"physical quantity","type":"related","note":"derived"},{"target":"force","type":"related","note":"force per area"},{"target":"wind","type":"related","note":"pressure gradients"},{"target":"pascal","type":"related","note":"SI unit"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.pressure","Open English WordNet: oewn-11515441-n","SI unit symbol: Pa pascal"]},"properties":{"applicability":"required","items":["standard atmosphere: 101325 Pa - 1013.25 hPa","1 bar: 100000 Pa"]},"recognition":{"applicability":"required","items":["Values in Pa, kPa, bar, psi, mmHg, hPa","Gauge versus absolute labelling (psig, psia)","Isobars on weather maps","Readings on gauges, barometers and monitors."]},"capabilities":{"applicability":"required","items":["measure it, with gauges and barometers","convert units","design vessels and pipes to withstand it","forecast weather from it"]},"hazards":{"applicability":"required","items":["Vessel rupture","Confusing gauge and absolute pressure","Unit conversion errors","Barotrauma in diving and flying"]},"interfaces":{"applicability":"required","items":["SI Brochure","EU Pressure Equipment Directive 2014/68/EU","Clinical guidelines for blood pressure measurement"]},"context":{"applicability":"required","items":["Describing fluids, weather, engineering loads, sound and physiology.","atmospheric pressure","gas and hydraulic pressure","blood pressure","acoustic pressure and radiation pressure","pressure levels in meteorology"]}},"sources":[{"title":"Open English WordNet 2024, synset oewn-11515441-n","url":"https://en-word.net/id/oewn-11515441-n","note":"sense and gloss of the concept"},{"title":"Wiktionary: pressure","url":"https://en.wiktionary.org/wiki/pressure","note":"word senses and usage"}],"openQuestions":["Should pressure kinds be separate entries?","How should reference type be recorded?","How should agents present blood pressure without giving diagnosis?"],"resources":{"spec":"/models/things/publications/thing-pressure/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-pressure/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-11T05:41:46Z","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":"filled","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 2026-10-08T18:54:35+00:00: completeness 1.00; sense: WordNet gloss; 2 live sources; review by codex: pass"},"score":1.0}}