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EntityGroup[{entity1,entity2,…}]

represents a group of entities.

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EntityGroup

EntityGroup[{entity1,entity2,…}]

represents a group of entities.

Details

  • EntityGroup allows operations on groups of entities, for example finding the total population of a set of different countries.
  • An entity is generally specified as Entity[type,canonicalname]. A list of currently available entity types is given by EntityValue[].
  • Entity expressions can be created by using the interface.

Examples

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Basic Examples  (3)

Give the total population of a group of countries:

Wolfram Language code: EntityValue[EntityGroup[{Entity["Country", "China"], Entity["Country", "India"]}], "Population"]

Give the total populations for entities of mixed types:

Wolfram Language code: EntityValue[EntityGroup[{Entity["Country", "China"], Entity["City", {"NewYork", "NewYork", "UnitedStates"}]}], "Population"]

Give the total mass of all planets:

Wolfram Language code: EntityGroup[EntityClass["Planet", All]]["Mass"]

Applications  (2)

Provide the total mass of a combination of chemicals specified using different physical quantities:

Wolfram Language code: EntityValue[EntityGroup[{EntityInstance[Entity["Chemical", "CarbonDioxide"], Quantity[3, "Moles"]], EntityInstance[Entity["Chemical", "MolecularOxygen"], Quantity[800, "Liters"]]}], "AbsoluteMass"]

Add currency denominations:

Wolfram Language code: EntityValue[EntityGroup[{ EntityCopies[Entity["CurrencyDenomination", {"EconomicAndMonetaryUnion", 2, "Euros", "coin"}], 2], EntityCopies[Entity["CurrencyDenomination", {"EconomicAndMonetaryUnion", 1, "Euros", "coin"}], 3], EntityCopies[Entity["CurrencyDenomination", {"EconomicAndMonetaryUnion", 5, "EuroCents", "coin"}], 4] }], "Value"]//N

Add currency denominations from different monetary systems:

Wolfram Language code: EntityValue[EntityGroup[{ Entity["CurrencyDenomination", {"UnitedStates", 10, "USDollars", "banknote"}], EntityCopies[Entity["CurrencyDenomination", {"EconomicAndMonetaryUnion", 2, "Euros", "coin"}], 2], EntityCopies[Entity["CurrencyDenomination", {"EconomicAndMonetaryUnion", 1, "Euros", "coin"}], 3], EntityCopies[Entity["CurrencyDenomination", {"EconomicAndMonetaryUnion", 5, "EuroCents", "coin"}], 4] }], "Value"]

Properties & Relations  (2)

An EntityGroup of n copies of an entity is equivalent to EntityCopies[entity, n]:

Wolfram Language code: EntityValue[EntityGroup[Table[Entity["Building", "EiffelTower::5h9w8"], {2}]], "Height"]
Wolfram Language code: EntityValue[EntityCopies[Entity["Building", "EiffelTower::5h9w8"], 2], "Height"]

The entities can be given as an entity class:

Wolfram Language code: EntityGroup[EntityClass["Country", "Europe"]]["Area"]

The result is the same when an explicit list of entities is provided:

Wolfram Language code: EntityGroup[EntityList[EntityClass["Country", "Europe"]]]["Area"]

Possible Issues  (2)

Defining a group containing entities of different types does not take into account possible inclusion of one domain in another:

Wolfram Language code: EntityValue[{Entity["Country", "UnitedStates"], Entity["City", {"NewYork", "NewYork", "UnitedStates"}]}, "Population"]
Wolfram Language code: EntityValue[EntityGroup[{Entity["Country", "UnitedStates"], Entity["City", {"NewYork", "NewYork", "UnitedStates"}]}], "Population"]

Properties whose associated physical quantity is not extensive give Missing[…]:

Wolfram Language code: EntityGroup[{Entity["Element", "Hydrogen"], Entity["Element", "Hydrogen"]}]["AtomicMass"]
Wolfram Research (2015), EntityGroup, Wolfram Language function, https://reference.wolfram.com/language/ref/EntityGroup.html.

Text

Wolfram Research (2015), EntityGroup, Wolfram Language function, https://reference.wolfram.com/language/ref/EntityGroup.html.

CMS

Wolfram Language. 2015. "EntityGroup." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/EntityGroup.html.

APA

Wolfram Language. (2015). EntityGroup. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/EntityGroup.html

BibTeX

@misc{reference.wolfram_2026_entitygroup, author="Wolfram Research", title="{EntityGroup}", year="2015", howpublished="\url{https://reference.wolfram.com/language/ref/EntityGroup.html}", note=[Accessed: 13-June-2026]}

BibLaTeX

@online{reference.wolfram_2026_entitygroup, organization={Wolfram Research}, title={EntityGroup}, year={2015}, url={https://reference.wolfram.com/language/ref/EntityGroup.html}, note=[Accessed: 13-June-2026]}