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Amazon Lex
Developer Guide

Built-in Slot Types

Amazon Lex supports built-in slot types from the Alexa Skills Kit. 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.

For a list of available built-in slot types, see Slot Type Reference in the Alexa Skills Kit documentation.

Note

Amazon Lex doesn't support the AMAZON.LITERAL built-in slot type.

Amazon Lex supports the following built-in slot types. Slot types marked "Developer Preview" are in preview and might change.

Slot Type Short Description Supported Languages Availability
AMAZON.EmailAddress Converts words that represent an email address into a standard email address English (US) Developer Preview
AMAZON.Percentage Converts words that represent a percentage to a number and a percent sign (%) English (US) Developer Preview
AMAZON.PhoneNumber Converts words that represent a phone number into a numeric string English (US) Developer Preview
AMAZON.SpeedUnit Converts words that represent a speed unit into a standard abbreviation English (US) Developer Preview
AMAZON.WeightUnit Converts words that represent a weight unit into a standard abbreviation English (US) Developer Preview

When used with Amazon Lex, the following slot types extend the Alexa Skill Kit slot type.

Slot Type Short Description Supported Languages Availability
AMAZON.NUMBER Converts numeric words into digits English (US) Developer Preview
AMAZON.TIME Converts words that indicate times into a time format English (US) Available

The built-in slot types are described in detail in the following sections.