Built-in Slot Types

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Built-in Slot Types - Amazon Lex V1

End of support notice: On September 15, 2025, AWS will discontinue support for Amazon Lex V1. After September 15, 2025, you will no longer be able to access the Amazon Lex V1 console or Amazon Lex V1 resources. If you are using Amazon Lex V2, refer to the Amazon Lex V2 guide instead. .

Amazon Lex supports built-in slot types that define how data in the slot is recognized and handled. You can create slots of these types in your intents. This eliminates the need to create enumeration values for commonly used slot data such as date, time, and location. Built-in slot types do not have versions.

Slot Type	Short Description	Supported Locales
AMAZON.Airport	Recognizes words that represent an airport.	All locales
AMAZON.AlphaNumeric	Recognizes words made up of letters and numbers.	All locales except Korean (ko-KR)
AMAZON.City	Recognizes words that represent a city.	All locales
AMAZON.Country	Recognizes words that represent a country.	All locales
AMAZON.DATE	Recognizes words that represent a date and converts them to a standard format.	All locales
AMAZON.DURATION	Recognizes words that represent duration and converts them to a standard format.	All locales
AMAZON.EmailAddress	Recognizes words that represent an email address and converts them into a standard email address.	All locales
AMAZON.FirstName	Recognizes words that represent a first name.	All locales
AMAZON.LastName	Recognizes words that represent a last name.	All locales
AMAZON.NUMBER	Recognizes numeric words and converts them into digits.	All locales
AMAZON.Percentage	Recognizes words that represent a percentage and converts them to a number and a percent sign (%).	All locales
AMAZON.PhoneNumber	Recognizes words that represent a phone number and converts them into a numeric string.	All locales
AMAZON.SpeedUnit	Recognizes words that represent a speed unit and converts them into a standard abbreviation.	English (US) (en-US)
AMAZON.State	Recognizes words that represent a state.	All locales
AMAZON.StreetName	Recognizes words that represent a street name.	All locales except English (US) (en-US)
AMAZON.TIME	Recognizes words that indicate times and converts them into a time format.	All locales
AMAZON.WeightUnit	Recognizes words that represent a weight unit and converts them into a standard abbreviation	English (US) (en-US)

Note

For the English (US) (en-US) locale, Amazon Lex supports slot types from the Alexa Skill Kit. For a list of available built-in slot types, see the Slot Type Reference in the Alexa Skills Kit documentation.