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.

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Give the total population of a group of countries:

Give the total populations for entities of mixed types:

Give the total atomic mass of all chemical elements:

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

Add currency denominations:

Add currency denominations from different monetary systems:

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

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

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