{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.half-sibling","code":"thing-q27965041","url":"https://ver.cy/models/thing/q27965041/","name":"half-sibling","alternateNames":["maternal half-sibling","elder maternal half-sibling","younger maternal half-sibling","maternal half-brother","maternal half-sister","paternal half-brother","paternal half-sister","elder half-sibling","younger half-sibling","elder half-sister","half-sister","half-brother"],"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.REL"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"A sibling who shares only one biological parent with another person, either the mother (maternal half-sibling) or the father (paternal half-sibling); a second-degree relative.","purpose":"Let an agent handle half-siblings as a family relation in genealogy, genetics and general legal context, without legal advice on individual inheritance or family matters.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["One shared biological parent","Second-degree relative","Distinct from step-siblings","Legal status varies"],"structure":{"bundles":[{"id":"relation","name":"Relation","description":"Which relation.","layers":[{"id":"side","name":"Side","description":"Maternal or paternal.","findings":[{"id":"side-finding","name":"Side","description":"Shared parent.","questions":[{"text":"Which parent is shared?","kind":"definition"},{"text":"Is it a half-sibling or a step-sibling?","kind":"boundary"}]}]},{"id":"terms","name":"Terms","description":"Language.","findings":[{"id":"terms-finding","name":"Terms","description":"Terminology.","questions":[{"text":"Which term does the family use?","kind":"provenance"},{"text":"How is it expressed in other languages?","kind":"action"}]}]}]},{"id":"genealogy","name":"Genealogy","description":"Records.","layers":[{"id":"records","name":"Records","description":"Family tree.","findings":[{"id":"records-finding","name":"Records","description":"Genealogical records.","questions":[{"text":"How should the relation be recorded in a family tree?","kind":"action"},{"text":"Which documents confirm it?","kind":"provenance"}]}]},{"id":"privacy","name":"Privacy","description":"Living people.","findings":[{"id":"privacy-finding","name":"Privacy","description":"Privacy.","questions":[{"text":"Does the information concern living people who have not consented?","kind":"boundary"},{"text":"How should it be protected?","kind":"action"}]}]}]},{"id":"genetics","name":"Genetics","description":"DNA.","layers":[{"id":"dna","name":"DNA","description":"Shared DNA.","findings":[{"id":"dna-finding","name":"DNA","description":"Shared DNA.","questions":[{"text":"How much DNA do half-siblings typically share?","kind":"measurement"},{"text":"Can tests distinguish half-siblings from other relatives?","kind":"boundary"}]}]},{"id":"support","name":"Support","description":"Unexpected results.","findings":[{"id":"support-finding","name":"Support","description":"Support after surprises.","questions":[{"text":"Has a DNA test revealed an unexpected relative?","kind":"boundary"},{"text":"Which counselling or support services exist?","kind":"provenance"}]}]}]},{"id":"law","name":"Law","description":"Legal status.","layers":[{"id":"status","name":"Status","description":"Inheritance.","findings":[{"id":"status-finding","name":"Status","description":"Legal status.","questions":[{"text":"How does the law here treat half-siblings in succession, in general terms?","kind":"provenance"},{"text":"Where is official information?","kind":"provenance"}]}]},{"id":"advice","name":"Advice","description":"Professionals.","findings":[{"id":"advice-finding","name":"Advice","description":"Advice limit.","questions":[{"text":"Is the user asking about their own inheritance or family case?","kind":"boundary"},{"text":"How should they be referred to a lawyer?","kind":"action"}]}]}]}]},"agentConduct":{"may":["Explain what a half-sibling relationship is and the degree of relatedness in general terms.","Point people to counselling and to registries that handle donor or adoption contact.","Explain in general terms that family law differs by country on inheritance and support."],"mustNot":["Disclose a newly discovered half-sibling or a parentage finding to anyone but the person tested.","Interpret a DNA test result as proof of a family relationship.","Contact a relative on someone's behalf without their informed agreement.","Give legal advice on inheritance, support or parentage in a particular case.","Use a family link to locate a person who has not asked to be found."],"requiresHuman":["Any contact with a newly identified relative.","Any disclosure that reveals a parentage secret within a family."]},"ethics":{"considerations":["Discovering a half-sibling can reveal infidelity, donor conception or adoption and upend a family.","Both the person searching and the relative found have a right to decide about contact."],"affectedParties":["The person who was tested","Relatives who did not consent to being found","Donor-conceived people"]},"owners":{"steward":"The individuals themselves; civil registries hold the official record of parentage.","roles":[],"masterSystems":["Civil birth and parentage registers","Donor conception and adoption contact registers"]},"relations":[{"target":"Q108709310","type":"parent","note":"registry parent class"},{"target":"Q24882651","type":"parent","note":"registry parent class"},{"target":"biological sibling","type":"related","note":"category"},{"target":"step-sibling and full sibling","type":"related","note":"relations"},{"target":"family tree","type":"related","note":"genealogy"},{"target":"inheritance","type":"related","note":"law"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.half-sibling","Wikidata: Q27965041 (https://www.wikidata.org/wiki/Q27965041)"]},"properties":{"applicability":"not-applicable","items":["expected shared DNA: about 25 % - average"]},"recognition":{"applicability":"optional","items":["One shared parent","Maternal or paternal side","Step-siblings share no biological parent","Not physical; a relation between people."]},"capabilities":{"applicability":"required","items":["describe the relation precisely","record half-siblings in genealogy","understand genetic relatedness","find general information on legal status"]},"hazards":{"applicability":"required","items":["Revealing sensitive family information","Agents giving legal advice","Misreading DNA test results"]},"interfaces":{"applicability":"required","items":["Succession law on half-blood relatives","GEDCOM genealogy standard"]},"context":{"applicability":"required","items":["Describing family relationships.","maternal half-siblings","paternal half-siblings","donor-conceived half-siblings"]}},"sources":[{"title":"Wikidata item Q27965041: half-sibling","url":"https://www.wikidata.org/wiki/Q27965041","note":"identity and sense of the item"},{"title":"Wikipedia: Half-sibling","url":"https://en.wikipedia.org/wiki/Half-sibling","note":"general description of the item"}],"openQuestions":["Should donor-conceived relations be a separate entry?","How should genealogical records model it?","How should privacy be protected?"],"resources":{"spec":"/models/things/publications/thing-q27965041/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q27965041/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-11T09:42:29Z","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 2026-10-06T19:51:58+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}}