> ## Documentation Index > Fetch the complete documentation index at: https://docs.cognigy.com/llms.txt > Use this file to discover all available pages before exploring further. # System-Defined Slots *System-Defined Slots* refer to predefined Slot types that the system automatically detects in user inputs. These Slots are used to categorize and recognize specific types of data, such as dates, times, durations, and more. ## Key Benefits * **Automatic Extraction**. Cognigy.AI automatically detects and categorizes user input into predefined Slots, reducing manual configuration. * **Data Consistency**. By using system-defined Slots, Cognigy.AI ensures all extracted data is consistently formatted and accurate. * **Simplified Integration**. System-defined Slots simplify the handling of complex data types, enabling smooth integration with backend systems. ## All System-Defined Slots In the JSON object, all system-defined Slot names are capitalized for easy identification.
Slot Name User Input Slot JSON
DATE tomorrow, August 1st at 5pm ```json theme={null} "DATE": [ { "start": { "day": 2, "month": 6, "year": 2018, "hour": 12, "minute": 0, "second": 0, "millisecond": 0, "text": "tomorrow", "weekday": 6, "dayOfWeek": "Saturday", "ISODate": "2018-06-02T12:00:00Z" }, "end": null } ] ```
next week ```json theme={null} "DATE": [ { "start": { "year": 2021, "month": 12, "day": 13, "hour": 0, "minute": 0, "second": 0, "milliseconds": 0, "weekday": 1, "dayOfWeek": "Monday", "ISODate": "2021-12-13T00:00:00+01:00", "plain": "December 13, 2021", "grain": "week" }, "end": null, "text": "next week" } ] ```
NUMBER one hundred, 143 ```json theme={null} "NUMBER": [ 100, 143 ] ```
DURATION 10 minutes 20 seconds ```json theme={null} "DURATION": { "hour": null, "minute": 10, "second": 20 } ```
TEMPERATURE 50 degrees ```json theme={null} "TEMPERATURE": [ 50 ] ```
AGE 32 years old ```json theme={null} "AGE": [ 32 ] ```
EMAIL [info@cognigy.com](mailto:info@cognigy.com) ```json theme={null} "EMAIL": [ "info@cognigy.com" ] ```
PERCENTAGE 5 percent ```json theme={null} "PERCENTAGE": [ 5 ] ```
URL [https://cognigy.com](https://cognigy.com) ```json theme={null} "URL": [ "https://cognigy.com" ] ```
MONEY 500 dollars ```json theme={null} "MONEY": [ { "value": 500, "unit": "$" } ] ```
DISTANCE 12 kilometers ```json theme={null} "DISTANCE": [ { "value": 12, "unit": "kilometre" } ] ```
## DATE Slots DATE Slot detection depends on the time zone you set in the [Project](/ai/administer/access/project-settings#nlu-settings) or through [API functions](/ai/for-developers/code/api-functions). | Languages | Supported input pattern examples | | --------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | English | Now, Today, Tomorrow, Yesterday, Last Friday, Last night
17 August 2013 - 19 August 2013
This Friday from 13:00 - 16.00
5 days ago
2 weeks from now
Sat Aug 17 2013 18:40:39 GMT+0900 (JST)
2014-11-30T08:15:30-05:30
Day after tomorrow
Days before yesterday
Next Tuesday | | German | Jetzt, Heute, Morgen, Gestern, Vorgestern
Letzte Nacht, Heute Nacht, Diese Nacht, Morgen Vormittags, Gestern Abend
Nach einem Tag, In einer Woche
15/01/2021, 15.01.2021, 15. Jan 2021, Freitag den 15. Januar 2021
17.08.2013 - 19.08.2013, 17.08.2013 bis 19.08.2013
Kommenden Montag | | Dutch | Nu, Deze Nacht, Deze Vannacht, Gisteren, Morgen, Gisteravond, Eergisteren, Overmorgen
Morgen Middag, Deze Ochtend, Gisteren Voormiddag, Deze Namiddag, Morgen Avond, Overmorgen Nacht
Binnen Een Dag, Na een halve Maand
15/01/2021, 15.01.2021, 15. Jan 2021, Vrijdag de 15de Januari 2021
17.08.2013 - 19.08.2013, 17.08.2013 tot 19.08.2013
Laatste/vorige/volgende/komende Woensdag | | Japanese | 今日, 当日, 昨日, 明日, 今夜, 今夕, 今晩, 今朝
２０１６年２月１７日です
Sat Aug 17 2013
01/30/2018 | | French | 15.04.2023 12:00
15 aout 2015
15 aout 2015 a 12 octobre 2016
aujourd'hui, demain, hier
hier soir, demain après-midi
avant-hier
vendredi prochain | | Other languages | For languages like Finnish, Cognigy.AI supports standard date formats but has limited support for casual expressions. For example:
ylihuomenna (the day after tomorrow) — the system correctly matches it to a DATE Slot, but inconsistencies may arise due to limitations with casual expressions.
kolme viikkoa sitten (three weeks ago) — the system identifies it as a DURATION Slot instead of a DATE Slot.
kuukauden päästä (in one month) — the system doesn't recognize this input, highlighting a gap in handling relative time expressions in Finnish. | ### DATE Format Handling DATE Slot parsing follows the NLU language set in the Flow. Different regions use different date formats for slash-separated dates. The table outlines the format handling: | Languages | Slash date format ordering | | ------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | Default (English UK, German, Universal, and more) | Dates follow day/month/year (`dd/mm/YYYY`) order. | | English US, Japanese, Chinese | Dates follow month/day/year (`mm/dd/YYYY`) order. However, if the system detects an invalid date, for example, `13/01/2023` in `mm/dd/YYYY` format, it automatically falls back to `dd/mm/YYYY`. | For a full list of country-specific date formats, refer to the [Date\_format\_by\_country](https://en.wikipedia.org/wiki/Date_format_by_country) page on Wikipedia. ### Invalid Date Handling Cognigy.AI automatically checks all dates from user inputs. If a date is invalid, it won't be assigned to the DATE Slot. The system ensures: * Leap year validation: `February 29, 2024` is valid, but `February 29, 2023` isn't. * Correct month-day mapping: `April 31` is invalid. * Fallback correction for ambiguous formats: `13/01/2023` defaults to `dd/mm/YYYY` if `mm/dd/YYYY` is invalid. ### Future and Past Date Mapping DATE Slot detection applies the current year by default unless specified otherwise. The system follows these rules: | **Scenario** | **User Input** | **Today's Date** | **Processing Logic** | DATE Slot Result | | ------------------------------------------------------ | ------------------ | ---------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------ | ------------------------------------- | | Date is in the current month, no year provided | `"July 21"` | July 26, 2023 | Since the input date falls within the current month and no year is provided, the system assumes the current year. | `"year": 2023, "month": 7, "day": 21` | | Date is in a past month, no year provided | `"March 30"` | July 26, 2023 | The input date has already passed in the current year. Since no year is specified, the system assumes it refers to the next occurrence in the upcoming year. | `"year": 2024, "month": 3, "day": 30` | | Date is in a past month, with a specific year provided | `"March 30, 2021"` | July 26, 2023 | The input includes a specific year, so the system directly assigns that year without modification. | `"year": 2021, "month": 3, "day": 30` | ## More Information * [Overview](/ai/platform-features/nlu/slots/system-defined) * [User-Defined Slots (Lexicons)](/ai/platform-features/nlu/slots/user-defined/lexicon)