<table style="minWidth: 146px"><colgroup><col style="width: 121px"><col></colgroup><tbody><tr><td colspan="1" rowspan="1" colwidth="121"><p>Purpose</p></td><td colspan="1" rowspan="1"><p>Test whether a value is empty</p></td></tr><tr><td colspan="1" rowspan="1" colwidth="121"><p>Parameters</p></td><td colspan="1" rowspan="1"><p>One Value, any type</p></td></tr><tr><td colspan="1" rowspan="1" colwidth="121"><p>Returns</p></td><td colspan="1" rowspan="1"><p>Boolean</p></td></tr></tbody></table><h1 id="5mw8z35qib5" data-toc-id="5mw8z35qib5">Description</h1><p>The expression will return <code>TRUE</code> if the field is empty, otherwise it will return <code>FALSE</code>.</p><img data-width="50%" data-align="right" data-featurebase-content-key="64d3d3062f8f6e8a3e58f79b/article/6813290b3db637ddc58e6ae8/01968ad8-8b3f-79f1-97d4-5932ccb7eac5/b64u-aW1hZ2UucG5n.png" data-featurebase-content-filename="image.png" src="https://64d3d3062f8f6e8a3e58f79b.featurebase-attachments.com/c/article/6813290b3db637ddc58e6ae8/01968ad8-8b3f-79f1-97d4-5932ccb7eac5/b64u-aW1hZ2UucG5n.png?X-Amz-Expires=3600&amp;X-Amz-Date=20260203T070000Z&amp;X-Amz-Algorithm=AWS4-HMAC-SHA256&amp;X-Amz-Credential=DO801TYC4FCVNNEKURKM%2F20260203%2Ffra1%2Fs3%2Faws4_request&amp;X-Amz-SignedHeaders=host&amp;X-Amz-Signature=d2b7472663f63595c6ae52f81b3f0d53a011b634d1dd036bf7c1b88fc69c4654"><h3 id="6q180m5yaz0" data-toc-id="6q180m5yaz0"></h3><p></p><div data-type="horizontalRule"><hr></div><p style="text-align: right">v3.0</p>

Reference documentation for using the IsEmpty expression

IsEmpty

Feedback

Roadmap

Changelog

Ben Lehmann

Using OneBot

Workflows

Access powerful expressions and action outputs using OneBot's tag control

Tag Control

The building blocks for getting work done with OneBot

Actions

Actions Introduction

Use expressions and data to supercharge your workflows.

Expressions

Use expressions to process information and supercharge your workflows.

Expressions Introduction

How to create, manage and edit expressions across your workflows and actions

Create and Edit Expressions

Adaptive Cards

Uses Adaptive Cards to gather and present rich, interactive services, tools and information

Adaptive Cards Introduction

Understanding Adaptive Cards

Understand how to create and add an Adaptive Card to OneBot

Write an Adaptive Card

Understand how to add, use and remove cards with OneBot

Using Adaptive Cards

Integrations

Neurons for ITSM

Trigger workflows to run inside of OneBot using the Ivanti Neurons for ITSM Web Request Quick Action

Using Web Requests to Trigger OneBot Workflows

Manage the chat clients you use with OneBot

Chat Clients

Microsoft Teams

Understand how to set up and deploy a OneBot App for Microsoft Teams

Microsoft Teams Deployment

Set which statuses OneBot uses to select available users

Microsoft Teams Permissions and Available Status Configuration

Understand how to configure Azure presence permissions for OneBot

Azure presence permissions for OneBot

Web Chat Client

Add a OneBot web chat client to your website.

Web Chat Client Introduction

Kevin Baker

Resources

Guides

Present information with a clean and appealing format, while also supporting cross-platform reusability and interoperability.

Walkthroughs

Creating a basic adaptive card

Support Channel

Reference

Detailed information on using OneBot Expressions

Use Logical Expressions to make evaluations of information and data, and to control and guide the process of your workflows.

Logical Expressions

Text Expressions

Numeric Expressions

Date and Time Expressions

Array Expressions

Object Expressions

Data and Type Expressions

State and Control Expressions

Reference for all actions available within OneBot

Core Actions

Neurons for ITSM Actions

REST API Actions

Teams Actions

Web Chat Client Actions

Email Actions

Glossary

Access the connection endpoint information your Teams bot needs to exchanging messages with your OneBot instance

Endpoint for Teams Bots

Configure a Microsoft Entra Tenant ID for OneBot to use with Microsoft Teams

Tenant ID for Teams Bots

Set the level of view access to Teams user's Available Status that you want OneBot to ask for.

Available Status for Teams Bots

Configure your OneBot's welcome message to users starting a new chat

Welcome Card

Set up a OneBot integration with Ivanti Neurons using a Tenant URL

Tenant URL for Ivanti Neurons

Configure which languages are available within your OneBot instance

Available Languages

Set the minimum time OneBot should retain chat transcripts

Transcript retention policy

A secret and unique identifier used for authentication and authorisation

Neurons API Key

How can we help you?

Help Center

Improved

Fixed

onebot

Logged

Up Next

In Progress

Released

Rejected

High Priority

Low Priority

<p>Follow the development progress of our platform.</p>

Backlog

Done

Our Roadmap

<p>Tell us how we could make the product more useful to you and be kept informed of future updates.</p>

Purpose	Test whether a value is empty
Parameters	One Value, any type
Returns	Boolean