In ontology, the theory of categories concerns itself with the categories of being: the highest genera or kinds of entities according to Amie Thomasson. To investigate the categories of being, or simply categories, is to determine the most fundamental and the broadest classes of entities. A distinction between such categories, in making the categories or applying them, is called an ontological distinction. Various systems of categories have been proposed, they often include categories for substances, properties, relations, states of affairs or events. A representative question within the theory of categories might articulate itself, for example, in a query like, Are universals prior to particulars?

Ontology is the philosophical discipline studying the nature and types of existence. Singular existence is the existence of individual entities while general existence refers to the existence of concepts or universals.

• Substance
  • genus
    • matter
  • species
    • solid
    • liquid
    • gas

• RELATIONS , REFERENCE
  • सम्बन्ध सिद्धान्त (Relation )
• TIME
• SPACE
  • 2d spaces ,2D , The third, described by the draught of a line, or composed of infinite such lines
    • 2d Existence
      • allow substance to pass through
        • gate semantograms , door
        • Window
        • cleft
      • retricted substances to pass through them
        • indefinite planar shape
        • 2d mind , 2d mental shapes can only exist in mind or on paper , conscious mind arising from the subconscious mind
        • 2D matter does not exist , only 2d shadows exist and paper realm or formal realm exists
          • 2d art
          • approximation would be a substance with thickness of one atom layer
    • 2D - two dimensional space
      • Definite area / meter square meter square area
      • definite planar shape , 2d coordinate shape , computational graphical shape , 2d shape
        • 2D matter does not exist
        • 2D computational graphics

• number

• Quality
  • property
    • dimensions
    • Size
    • shape
    • form
    • mass
    • energy
    • temperature
    • humidity
    • current
    • material
  • Accident

• Generalization
  • energy
  • events
  • phenomena
  • process
  • art
  • mechanism
  • action
  • reaction
  • Passion
• Particular events , phenomena
  • sound
  • light
  • fire
  • air

• Generalization
  • states of affairs , situation , condition , state
• particular
  • mood , mental state