class symbol; class mark
Computing term for a symbol or mark used to classify items, such as in library classification or data categorization systems.
In the library, a class mark is attached to the spine of each book.
In this database, each record is assigned a class symbol.
分類 is the general term for 'classification', while 分類記号 specifically refers to the symbol or mark used for classification.
記号 is a broad term for 'symbol' or 'mark'; 分類記号 narrows it to symbols used for classification purposes.
Compound of 分類 (classification) and 記号 (symbol). The exact historical derivation is uncertain, but the term is a straightforward technical compound.