{"id":"TEC-019","name":"Reuse single-source facts","domain":"technical_writing","layer":"content_system","strength":"heuristic","human_logic":"IF the same volatile fact appears in multiple documents, THEN centralize it or generate references from one source ELSE retain independent stable statements.","when":{"all":[{"path":"fact.duplicate_location_count","operator":"gt","value":1},{"path":"fact.volatility","operator":"in","value":["medium","high"]}]},"then":[{"action":"centralize","target":"fact","to":"single_source"},{"action":"reference","target":"duplicate_locations"}],"else":[{"action":"retain","target":"current_text","reason":"No triggering condition is present."}],"unless":[],"because":"Single sourcing reduces inconsistent updates.","diagnostics":[],"examples":{},"source_ids":["WEB-008","BK-023","BK-027"],"laka":{"smallest_sufficient_intervention":true,"primary_axes":["scope","depth","magnitude","reversibility"]},"requires_facts":["fact.duplicate_location_count","fact.volatility"],"tests":[],"sources":[{"id":"WEB-008","title":"DITA 1.3 Technical Content Specification","creator":"OASIS","domain":"structured_authoring","type":"OASIS Standard","note":"Topic-based concept, task, reference, troubleshooting, and reuse architecture.","url":"https://docs.oasis-open.org/dita/dita/v1.3/os/part2-tech-content/dita-v1.3-os-part2-tech-content.html"},{"id":"BK-023","title":"Technical Writing 101","creator":"Alan Pringle; Sarah O’Keefe","domain":"technical_writing","type":"Book","note":"Real-world documentation and structured authoring.","url":null},{"id":"BK-027","title":"Managing Your Documentation Projects","creator":"JoAnn T. Hackos","domain":"documentation_management","type":"Book","note":"Planning, resourcing, and managing documentation systems.","url":null}],"defined_in":{"file":"15-technical-writing-rules.json","title":"Technical Writing and Documentation Rules","slug":"technical-writing-rules"}}