Research any topic before you write.

Find related topics. | Discover entities. | See connections. | Build a topical map.

Universal Decimal Classification

The Universal Decimal Classification (UDC) is a bibliographic and library classification representing the systematic arrangement of all branches of human knowledge organized as a coherent system in which knowledge fields are related and inter-linked. The UDC is a faceted classification system featuring detailed vocabulary and syntax that enables powerful…

History, Applications, Technology & Measurement

Use the mouse wheel or two fingers (on touchscreens) to zoom in and out of the map.

Research this topic

Explore the main themes, entities and connections around Universal Decimal Classification. Start with the topic map, then use the sections below for research and deeper semantic analysis.

Explore this topic

Start with a few of the strongest sections from the source topic. These are research directions, not a list of keywords you must use.

Topics to explore

Browse the full topic structure. Each item opens a new analysis centered on that subject.

Overview

History

Application

Structure

Classifications based on UDC

Other faceted classifications

Other library classifications

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

Map overview Semantic statistics

Universal Decimal Classification

Nodes56
Edges55
Triples21
Avg. degree1.96
Density0.035714
Components1

How this topic connects Entity context

See the strongest relationship patterns around the current topic before diving into the raw triples.

Universal Decimal Classification

Top relations

related to Outline · 7
Universal Decimal Classification → Alike, Creative Commons Attribution Share, Multilingual Universal Decimal Classification, Summary, UDC, UDC Consortium, UDCC Publication No
related to External links · 5
Universal Decimal Classification → Archived, SummaryUDC Summary Linked Data, Universal Decimal Classification ConsortiumAbout, Universal Decimal ClassificationMultilingual UDC, Wayback Machine

Important terminology Word statistics

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

udc classification knowledge used tables common class language main auxiliary auxiliaries numbers system history science religion technology linguistics special various

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
filmsinstance ofThese can include textual documents and other media0.80text
videoinstance ofThese can include textual documents and other media0.80text
sound recordingsinstance ofThese can include textual documents and other media0.80text
illustrationsinstance ofThese can include textual documents and other media0.80text
maps as well as realia such as museum objectsinstance ofThese can include textual documents and other media0.80text
placeinstance ofincluding notions0.80text
language of the textinstance ofincluding notions0.80text
physical form of the documentinstance ofincluding notions0.80text
which may occur in almost any subjectinstance ofincluding notions0.80text
Universal Decimal Classificationrelated to External linksUniversal Decimal Classification ConsortiumAbout0.60section
Universal Decimal Classificationrelated to External linksUniversal Decimal ClassificationMultilingual UDC0.60section
Universal Decimal Classificationrelated to External linksSummaryUDC Summary Linked Data0.60section

Related concept clusters Concept neighborhoods

These clusters group vocabulary that occurs around closely connected concepts in the source material.

    Connections between topic areas Semantic bridges

    Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.

    Min side: 3
    For writers, content strategists, SEOs, marketers and creators — from quick topic research to advanced semantic analysis.