Ontology

Overview / Open Energy Ontology / Class - object aggregate

Label: object aggregate

Editor note:

An entity a is an object aggregate if and only if there is a mutually exhaustive and pairwise disjoint partition of a into objects

Editor note:

BFO 2 Reference: object aggregates may gain and lose parts while remaining numerically identical (one and the same individual) over time. This holds both for aggregates whose membership is determined naturally (the aggregate of cells in your body) and aggregates determined by fiat (a baseball team, a congressional committee).

Sub classes:

critical infrastructure

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Definition:

A critical infrastructure is an object aggregate of artificial objects and systems which have the critical infrastructure role.

population

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Definition:

A population is an aggregate of people in a spatial region.

portion of matter

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Definition:

A portion of matter is an aggregate of material entities that have a state of matter.

Editor note:

Portions of matter describe mass nouns like e.g. water, air and fuel. Mass nouns are uncountable, but portions of these can be quantified, like 1 glass of water, 1 m³ of air or 1 barrel of fuel. For further explanation please refer to: https://github.com/OpenEnergyPlatform/ontology/wiki/Explanation-on-mass-nouns

supply grid

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Definition:

A supply grid is an object aggregate of systematically connected artificial objects that can work as a supply system.

transport network

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Definition:

A transport network is an object aggregate of transport network components that enables the transport of people and/or goods.

Back to the super classes:

material entity

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Definition:

An independent continuant that is spatially extended whose identity is independent of that of other entities and can be maintained through time.

Editor note:

BFO 2 Reference: Material entities (continuants) can preserve their identity even while gaining and losing material parts. Continuants are contrasted with occurrents, which unfold themselves in successive temporal parts or phases [60

Editor note:

BFO 2 Reference: Object, Fiat Object Part and Object Aggregate are not intended to be exhaustive of Material Entity. Users are invited to propose new subcategories of Material Entity.

Editor note:

BFO 2 Reference: ‘Matter’ is intended to encompass both mass and energy (we will address the ontological treatment of portions of energy in a later version of BFO). A portion of matter is anything that includes elementary particles among its proper or improper parts: quarks and leptons, including electrons, as the smallest particles thus far discovered; baryons (including protons and neutrons) at a higher level of granularity; atoms and molecules at still higher levels, forming the cells, organs, organisms and other material entities studied by biologists, the portions of rock studied by geologists, the fossils studied by paleontologists, and so on.Material entities are three-dimensional entities (entities extended in three spatial dimensions), as contrasted with the processes in which they participate, which are four-dimensional entities (entities extended also along the dimension of time).According to the FMA, material entities may have immaterial entities as parts – including the entities identified below as sites; for example the interior (or ‘lumen’) of your small intestine is a part of your body. BFO 2.0 embodies a decision to follow the FMA here.