{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.bit","code":"thing-q8805","url":"https://ver.cy/models/thing/q8805/","name":"bit","alternateNames":["sign bit","word mark","parity bit","Moderate Density Parity-Check"],"kind":"thing","status":"published","version":"0.2.0-wave.1","language":"en","classifiers":{"family":"Thing Registry","category":"Cross-cutting context","entryKind":"thing","plane":"XCT","domain":["XCT.QTY"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"The basic unit of information in computing and digital communications, having one of two values, 0 or 1; bits are grouped into bytes and words, and special bits include sign and parity bits.","purpose":"Let an agent handle bits as information units by meaning, grouping, prefixes and use in codes.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Binary unit","Unit of information and storage","Bits per second measures data rate","Different from byte"],"structure":{"bundles":[{"id":"unit","name":"Unit","description":"What a bit is.","layers":[{"id":"value","name":"Value","description":"0 or 1.","findings":[{"id":"value-finding","name":"Value","description":"Bit value.","questions":[{"text":"What does the bit represent here?","kind":"definition"},{"text":"In which encoding?","kind":"definition"}]}]},{"id":"grouping","name":"Grouping","description":"Bytes and words.","findings":[{"id":"grouping-finding","name":"Grouping","description":"Grouping.","questions":[{"text":"How many bits are in the unit used?","kind":"measurement"},{"text":"Is it a byte or word?","kind":"definition"}]}]}]},{"id":"measurement","name":"Measurement","description":"Sizes and rates.","layers":[{"id":"prefixes","name":"Prefixes","description":"Decimal and binary.","findings":[{"id":"prefixes-finding","name":"Prefixes","description":"Prefixes.","questions":[{"text":"Is the prefix decimal (kilo) or binary (kibi)?","kind":"boundary"},{"text":"What is the exact value?","kind":"measurement"}]}]},{"id":"rate","name":"Rate","description":"Bits per second.","findings":[{"id":"rate-finding","name":"Rate","description":"Data rate.","questions":[{"text":"Is the speed in bits or bytes per second?","kind":"boundary"},{"text":"How does it convert?","kind":"measurement"}]}]}]},{"id":"codes","name":"Codes","description":"Error detection.","layers":[{"id":"parity","name":"Parity","description":"Check bits.","findings":[{"id":"parity-finding","name":"Parity","description":"Parity bits.","questions":[{"text":"How does a parity bit detect errors?","kind":"definition"},{"text":"What errors can it miss?","kind":"boundary"}]}]},{"id":"ecc","name":"Error correction","description":"Codes.","findings":[{"id":"ecc-finding","name":"ECC","description":"Error-correcting codes.","questions":[{"text":"Which error-correcting code is used?","kind":"definition"},{"text":"How many errors can it correct?","kind":"measurement"}]}]}]},{"id":"theory","name":"Theory","description":"Information.","layers":[{"id":"entropy","name":"Entropy","description":"Information content.","findings":[{"id":"entropy-finding","name":"Entropy","description":"Information content.","questions":[{"text":"How many bits of information does this message carry?","kind":"measurement"},{"text":"Under which model?","kind":"definition"}]}]},{"id":"quantum","name":"Quantum","description":"Qubits.","findings":[{"id":"quantum-finding","name":"Quantum","description":"Qubits.","questions":[{"text":"Is a qubit meant instead?","kind":"boundary"},{"text":"How does it differ?","kind":"definition"}]}]}]}]},"agentConduct":{"may":["Convert and report quantities in bits and bytes, stating decimal or binary prefixes.","Explain how bits encode information."],"mustNot":["Mix up bits and bytes when stating data rates or storage sizes.","Confuse decimal and binary prefixes in a way that misleads buyers.","Flip or corrupt bits in data it does not own."],"requiresHuman":["Changing bits in safety-critical firmware or records."]},"ethics":{"considerations":["Misstated capacities and speeds mislead consumers.","All digital records rest on bits being stored faithfully."],"affectedParties":["Users of digital systems","Buyers of storage and connections"]},"owners":{"steward":"Nobody: a unit of information held in common.","roles":[],"masterSystems":[]},"relations":[{"target":"Q309314","type":"parent","note":"registry parent class"},{"target":"unit of information","type":"related","note":"category"},{"target":"byte","type":"related","note":"unit"},{"target":"binary digit","type":"related","note":"digit"},{"target":"information theory","type":"related","note":"field"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.bit","Wikidata: Q8805 (https://www.wikidata.org/wiki/Q8805)","IEC 80000-13 symbol: bit unit"]},"properties":{"applicability":"not-applicable","items":["byte: 8 bits - conventional octet"]},"recognition":{"applicability":"optional","items":["Values 0 and 1","Symbols b (bit) versus B (byte)","Prefixes such as kbit, Mbit, Kibit","Not visible; stored as physical states such as voltages or magnetisation."]},"capabilities":{"applicability":"required","items":["count and convert bits and bytes","use binary and decimal prefixes correctly","detect errors with parity bits","measure information in bits"]},"hazards":{"applicability":"required","items":["Confusing bits and bytes in speeds","Mixing decimal and binary prefixes"]},"interfaces":{"applicability":"required","items":["IEC 80000-13 (binary prefixes)","ISO/IEC 2382 vocabulary"]},"context":{"applicability":"required","items":["Representing and transmitting digital information.","data bits","parity and check bits","sign bits","qubits (quantum analogue)"]}},"sources":[{"title":"Wikidata item Q8805: bit","url":"https://www.wikidata.org/wiki/Q8805","note":"identity and sense of the item"},{"title":"Wikipedia: Bit","url":"https://en.wikipedia.org/wiki/Bit","note":"general description of the item"}],"openQuestions":["Should qubits be a separate entry?","How should prefixes be linked?","How should parity codes be linked?"],"resources":{"spec":"/models/things/publications/thing-q8805/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q8805/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-11T07:58:54Z","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 2026-10-06T19:52:02+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass","interaction.properties":"Plane XCT: no invented physical properties."},"score":1.0}}