The property subject is used to flag the intellectual content of a book or books, using a standardised set of classifications.
Subjects are described in early books using variant terminology. The following descriptors are defined as the standardised forms used to tag subjects as Properties, when they occur:
Art (this includes painting, drawing, perspective)
Agriculture
Alchemy
Architecture
Astrology
Astronomy
Biography
Botany
Cartography (this includes maps)
Classics
Economics (this includes trade and business)
Gardening (this includes horticulture and husbandry)
Geography (this includes travel)
Grammar
Heraldry (this includes genealogy)
History (this includes chronology)
Law
Lexicography (this includes dictionaries)
Literature (this includes poetry, drama, romances)
Logic
Magic (this includes necromancy)
Mathematics
Medicine (this includes anatomy, surgery)
Military affairs (this includes fortification, warfare manuals)
Music
Natural history
Numismatics
Orientalism
Philology
Philosophy
Politics (this includes current affairs)
Rhetoric
Science
Theology (this includes patristics, exegesis, devotional works, doctrinal and controversial theology)