Knowledge-Organization on emsenn.net

Domain Analysis

Tue, 31 Mar 2026 00:00:00 +0000

Domain analysis is a framework in information science, developed by Birger Hjorland and Hanne Albrechtsen (1995), that treats a domain as “a body of knowledge, defined socially and theoretically as the knowledge of a group sharing ontological and epistemological commitments.” Domains are not natural kinds waiting to be discovered. They are discourse communities held together by shared assumptions about what exists, what counts as evidence, and how knowledge is produced.

Faceted Classification

Tue, 31 Mar 2026 00:00:00 +0000

Faceted classification is a method of knowledge organization developed by S.R. Ranganathan, first implemented in his Colon Classification (1933). Instead of enumerating every possible subject in a fixed schedule (as Dewey and the Library of Congress systems do), faceted classification analyzes any subject into a small set of fundamental facets that combine freely to express compound subjects.

Ranganathan identified five fundamental facets, known by the mnemonic PMEST:

Personality — the distinguishing characteristic, the focal entity of the subject (e.g., rice in agriculture, the liver in medicine)
Matter — the material, substance, or property involved (e.g., nitrogen in soil science, glass in architecture)
Energy — the action, process, or operation (e.g., cultivation, surgery, combustion)
Space — the geographic location or spatial context
Time — the temporal period or chronological aspect

A subject like “the nitrogen cycle in tropical soils during the monsoon season” decomposes into Personality (soil), Matter (nitrogen), Energy (cycling), Space (tropics), and Time (monsoon season). The colon (:) in the Colon Classification serves as the notation device joining facet values into a composite class number.

Integrative Levels

Tue, 31 Mar 2026 00:00:00 +0000

Integrative levels are successive forms of order arranged in a scale of complexity: atoms, molecules, cells, organisms, minds, societies, cultures. Joseph Needham coined the term in 1937, drawing on earlier work in emergentist philosophy. The core idea is that matter organizes itself into increasingly complex structures, each level integrating the components of the level below while producing qualities that did not exist at that lower level.

James Feibleman (1954) formalized the concept into twelve laws. The central ones: each level organizes entities from the level below into new wholes. Each level has at least one emergent quality not present at lower levels. Higher levels depend on lower levels for their existence. Higher levels cannot be fully explained by (reduced to) lower levels. The laws run in both directions — higher levels also exert constraints on lower levels (downward causation), and disruption at any level propagates both up and down.

Upper Ontologies and Knowledge Organization

Tue, 31 Mar 2026 00:00:00 +0000

Every major upper ontology divides reality by mode of being — how things exist — rather than by topic, discipline, or domain. No upper ontology lists “physics,” “biology,” and “sociology” as top-level categories. This is a finding, not an accident, and it has consequences for how knowledge libraries should be organized.

¶Four upper ontologies

BFO (Basic Formal Ontology) divides everything into two categories: continuants (entities that persist through time and maintain their identity — objects, qualities, roles) and occurrents (entities that unfold in time — processes, events, temporal regions). BFO became ISO/IEC 21838-2 in 2020. It is deliberately minimal: 36 classes, no domain content, designed as a top-level framework that domain ontologies extend. Its philosophical lineage runs through Aristotelian substance ontology.

Directory organization for knowledge systems: a best-practices synthesis

Mon, 09 Mar 2026 00:00:00 +0000

A knowledge repository needs a directory structure that can hold the full range of what knowledge work involves. The literature surveyed in the supporting research texts [@asr-research-knowledge-organization-systems; @asr-research-intellectual-differentiation; @asr-research-epistemological-structure; @asr-research-process-ontology; @asr-research-social-learning] does not converge on a single canonical schema. It does converge on a set of functional distinctions that any adequate schema must represent. This text synthesizes those distinctions into four organizing groups and their constituent directory types.

¶1. Grounding principle: categories as activities

Process philosophy establishes that categories are better understood as ways of tracking patterns of becoming than as bins for finished things [@asr-research-process-ontology]. This permits — and the relational commitment of this project requires — that directory names take gerund form: they name activities, not substances. A methods/ directory holds how-knowledge-is-produced, not an inert category called “methods.” The form is functional.

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