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A systematic arrangement that categorizes items into classes for organization, discovery, and retrieval.
DESCRIPTION
Classification schemes structure knowledge by assigning items to classes based on shared attributes. Library systems widely use DDC, LCC, and UDC to organize collections. Schemes can be hierarchical, faceted, or enumerative, and may integrate with thesauri or ontologies. Effective classification improves navigation, indexing, and analytics. Governance manages class definitions, changes, and mappings to external schemes.
ALTERNATIVE DEFINITIONS
OCLC Dewey Decimal Classification
The Dewey Decimal Classification (DDC) system is the world’s most widely used way to organize library collections.
Emphasizes practical organization of collections as a classification system.
Library of Congress Classification
The Library of Congress Classification (LCC) organizes library materials by subject into a hierarchical system of classes and subclasses.
Highlights hierarchical subject organization into classes and subclasses.
UDC Consortium
The Universal Decimal Classification is a multilingual classification scheme for organizing all fields of knowledge.
Underscores multilingual scope and breadth across knowledge domains.
RELATED TERMS
Thesaurus Subject Headings Knowledge Organization System Dewey Decimal Classification Library of Congress Classification
COMPETING TERMS
Class Hierarchy Knowledge Representation
RELATIONS
- Broader: Knowledge Organization System
KNOWLEDGE AREAS
Semantic & Knowledge Modeling Metadata Management Data Management Data Architecture
TARGET AUDIENCE
Information Analyst Data Steward Data Architect Data Modeler
EXTERNAL SOURCES
- Wikipedia - Library classification
- OCLC - DDC classification overview
- Library of Congress - LCC outline and resources
- UDC Consortium - UDC system overview
TOP QUESTIONS
How does a Classification Scheme differ from a Taxonomy?
Classification schemes often target organizing collections, while taxonomies focus on conceptual hierarchies; both may overlap in structure and use.
Category: Misunderstanding
Why use a Classification Scheme?
It improves findability, browsing, and analytics by structuring items into clear classes and subclasses.
Category: Relevancy
What are common scheme types?
Hierarchical, faceted, and enumerative schemes are common, each suited to different domains and use cases.
Category: Overview
What mistakes occur in Classification Scheme design?
Overly rigid classes, poor granularity, and misalignment with user tasks lead to low adoption.
Category: Mistakes
How do Classification Schemes integrate with ontologies?
Classes can be mapped to ontology concepts, enabling richer semantics and reasoning.
Category: Integration
Who manages Classification Schemes?
Information professionals and stewards govern class definitions, revisions, and mappings.
Category: Management
How is success measured?
Improved retrieval metrics, reduced misclassification, and user satisfaction in browsing and search.
Category: Testing
Which well-known schemes exist?
DDC, LCC, and UDC are widely adopted library classification schemes.
Category: Resources
Where to start designing a Classification Scheme?
Analyze domain content and tasks, define classes and facets, validate with users, and iterate.
Category: Requirements