{"type": {"key": "/type/author"}, "alternate_names": ["Karen Ida Boalth Sp\u00e4rck Jones", "Karen Sparck Jones", "Karen Jones", "Jones Karen Sparck", "Karen Sprack-Jones", "Karen Spack-Jones", "Karen I.B. Spaerck Jones", "Karen I. B. Spaerck Jones"], "source_records": ["bwb:9781575865690", "bwb:9780387218212"], "personal_name": "Karen Sparck Jones", "name": "Karen Sp\u00e4rck Jones", "key": "/authors/OL533579A", "birth_date": "1935", "bio": {"type": "/type/text", "value": "pioneering British computer and information scientist responsible for the concept of inverse document frequency (IDF), a technology that underlies most modern search engines"}, "death_date": "2007", "latest_revision": 6, "revision": 6, "created": {"type": "/type/datetime", "value": "2008-04-01T03:28:50.625462"}, "last_modified": {"type": "/type/datetime", "value": "2025-09-15T15:39:07.777709"}}