Knowledge Representation & Access

(Ctrl+) — give free-form linguistics to be converted to Wolfram Language form

Entity — symbolic representation of a named entity of any type (e.g. "City", "Person", ...):

EntityClass — representation of a class of entities of a given type (e.g. G8 countries):

EntityInstance — specific instance of an entity (e.g. 5 kg of gold or USA in 1850)

EntityCopies — multiple copies of an entity (e.g. 10 baseballs)

EntityGroup — group of entities (e.g. hamburger and fries)

RandomEntity — random entity of a given type

Entities Implicitly Identified by Property Values

Entity[type,propvalues] — entities with properties whose values satisfy conditions

TakeLargest  ▪  TakeSmallest  ▪  GreaterThan  ▪  LessThan  ▪  Between

ContainsAny  ▪  ContainsAll  ▪  ContainsOnly  ▪  ContainsNone

EntityList — generate an explicit list of entities from a specification

EntityClassList — generate an explicit list of entity classes

EntityProperties — properties available for a class of entities

EntityProperty — symbolic representation of a property for a type of entity (e.g. "Population"):

EntityPropertyClass — a class of properties of a given type (e.g. demographics)

EntityValue — value of a property of an entity or set of entities (e.g. density of gold)

CommonName — common printable name of an entity or property

CanonicalName — unique canonical name of an entity or property

EntityTypeName — name of the type of an entity

Dated — represent an entity or property on a specific date

GeoPosition  ▪  DateObject  ▪  Quantity

ToEntity — convert from an ordinary expression (e.g. character) to an entity

FromEntity — convert if possible from an entity to an ordinary expression

WolframLanguageData — computable data about all built-in Wolfram Language functions

WikipediaData — material from Wikipedia about an entity or topic

Specific Domains

CountryData  ▪  CityData  ▪  ChemicalData  ▪  FinancialData  ▪  WeatherData  ▪  WordData  ▪  PersonData  ▪  ...

SemanticInterpretation — convert free-form linguistics to Wolfram Language form

SemanticImport — import data, converting entities, etc. to Wolfram Language form

Interpreter — interpret input of various types (e.g. "City", "Date", etc.)

Direct Wolfram|Alpha Access

WolframAlpha — get results in many possible forms from Wolfram|Alpha

( at beginning of input) — use free-form linguistics to generate Wolfram Language output

(  at beginning of input) — generate full Wolfram|Alpha output

Custom Entity Stores

EntityStore — complete representation of custom entities and their properties

$EntityStores — return a list of currently registered entity stores

Wolfram Data Repository

ResourceObject — symbolic representation of a resource object with content and metadata

ResourceData — extract specific elements from a resource object

Wolfram Data Drop

Databin — symbolic representation of an incrementally accumulated databin

System Configuration

Edit ▶ Preferences... ▶ Internet Connectivity — enable and disable connectivity to the Wolfram Knowledgebase

• WDF (Wolfram Data Framework)
• Free-Form & External Input
• Wolfram|Alpha Integration
• Units & Measures
• Probability & Statistics with Quantities