เปรียบเทียบวิธี

	Controlled Vocabulary Indexing	Knowledge Organization System Design
สาขาวิชา	Library Information Science	Library Information Science
ตระกูล	Process / pipeline	Process / pipeline
ปีกำเนิด	2005	2000
ผู้ริเริ่ม	ANSI/NISO Z39.19; Elaine Svenonius	Elaine Svenonius; ANSI/NISO Z39.19
ประเภท	Indexing pipeline using a controlled vocabulary	Design pipeline for specifying a knowledge organization system
แหล่งต้นตำรับ	NISO. (2005). ANSI/NISO Z39.19-2005 (R2010): Guidelines for the Construction, Format, and Management of Monolingual Controlled Vocabularies. Baltimore: NISO.	Svenonius, E. (2000). The Intellectual Foundation of Information Organization. Cambridge, MA: MIT Press. ISBN: 9780262194334
ชื่อเรียกอื่น	Subject Indexing, Controlled Indexing, Assigned Indexing, Vocabulary-Controlled Subject Indexing	KOS Design, Knowledge Organization System Engineering, Information Organization System Design, Bibliographic Language Design
ที่เกี่ยวข้อง	3	3
สรุป	Controlled vocabulary indexing is the process of representing what a document is about by assigning preferred terms drawn from an established controlled vocabulary or thesaurus, rather than from the document's own free-text words. ANSI/NISO Z39.19 codifies the practice: the indexer first performs conceptual analysis to determine a document's aboutness, then translates each concept into the vocabulary's preferred term, choosing how many concepts to capture (exhaustivity) and how finely to express each (specificity). Elaine Svenonius's account of subject languages explains why this controlled translation matters — it eliminates the synonymy and homonymy of natural language so that one concept is always indexed under one term. Done consistently, controlled vocabulary indexing gives a collection reliable, predictable subject access that free-text search alone cannot guarantee.	Knowledge organization system (KOS) design is the principled specification of the artefacts — classification schemes, thesauri, subject heading lists, taxonomies, name and subject authorities, and ontologies — that organize recorded information for retrieval. Elaine Svenonius's The Intellectual Foundation of Information Organization recast this work as the design of bibliographic languages, each with a vocabulary, a semantics, and a syntax, all justified by the user objectives an information system exists to serve: to find, identify, select, and obtain. KOS design begins from those objectives and the entities a domain contains, then specifies controlled vocabulary, fixes the mapping between terms and concepts, defines the syntax for combining terms, and evaluates the result against the objectives and against design principles. Standards such as ANSI/NISO Z39.19 supply the construction rules for the vocabulary layer.