depth classification system; close classification system
A library/information science term for a classification scheme that arranges subjects in a hierarchical order from general to specific, allowing for detailed subdivision. Used in computing contexts for organizing data or documents.
This library uses a depth classification system to organize materials in detail.
A general classification system; 深層分類体系 specifically emphasizes a deep, hierarchical structure.
Compound of 深層 (deep layer) + 分類 (classification) + 体系 (system). A technical term likely coined in library and information science.