# Exclusive Gateway

The **Exclusive Gateway** is used to create **conditional process flows** within a business process.\
It directs the execution flow to **exactly one outgoing path**, based on the evaluation of defined conditions.

Exclusive Gateways are typically used to model **decision points**, where only one outcome can be selected at runtime.

***

### Purpose

The **Exclusive Gateway** evaluates conditions on its outgoing paths and routes the process flow to **only one path whose condition evaluates to true**.

Key characteristics:

* Only one outgoing sequence flow is taken
* Conditions are evaluated sequentially
* If multiple conditions are true, only the first valid path is selected
* A default path can be defined using **Otherwise**

Outgoing flows are represented as **arrow links (`→`)**, connecting the Exclusive Gateway to subsequent activities or events.

***

### Exclusive Gateway Configuration Overview

The Exclusive Gateway configuration panel consists of **two main tabs**:

1. **General**
2. **Gateway**

***

### General Tab

The **General** tab contains basic information about the gateway, such as:

* Gateway name (title)
* Gateway ID

These properties are used to identify the gateway within the process diagram.

> **Important**\
> Always click **Save Panel** to persist any configuration changes.

***

### Gateway Tab

The **Gateway** tab is used for configuring condition‑based routing.\
Conditions themselves are defined **on each outgoing link**, not directly on the gateway node.

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***

### Configuring Conditions on Outgoing Links

When outgoing paths are created from an **Exclusive Gateway** (or an Inclusive Gateway), each link must be configured with condition logic.

#### Steps to Configure Link Conditions

1. Double‑click on an outgoing link (`→`) from the Exclusive Gateway
2. The **Gateway Parameter Panel** opens

<figure><img src="https://2015371994-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FMpDjHWFRUtZ5nJcSfVXd%2Fuploads%2FGukBY4lhfzr1eOqxRTjD%2Fimage.png?alt=media&#x26;token=ef946457-839d-406c-a41f-eca0072365b8" alt=""><figcaption></figcaption></figure>

***

### Gateway Parameter Properties

| Property  | Mandatory | Description                                             |
| --------- | --------- | ------------------------------------------------------- |
| Otherwise | No        | Defines the **default path** when no conditions match   |
| Label     | No        | Name of the path (e.g. *Approve*, *Reject*)             |
| Condition | Yes       | Expression used to determine whether this path is taken |

***

### Defining Conditions using Formula Editor

Click the **Condition** button in the Gateway Parameter panel to open the **Formula Editor**.

In the Formula Editor, users can:

* Create new expressions
* Modify existing expressions
* Reference Business Object data and process parameters

The condition returns **true or false**, controlling whether the corresponding path is selected.

For more details, see the **Formula Editor** documentation.

***

### Usage Guidelines

* Use Exclusive Gateway when **only one path must be selected**
* Ensure conditions are **mutually exclusive**
* Always define an **Otherwise** path to avoid dead‑ends
* Clearly label outgoing paths for readability
* Avoid complex logic directly on gateways—use Business Objects and formulas instead

***

### Summary

The **Exclusive Gateway** is the primary mechanism for modeling **conditional, single‑path decision logic** in a process.

Key points:

* Routes execution to only one path
* Conditions are evaluated on outgoing links
* Supports default routing using **Otherwise**
* Uses Formula Editor for condition logic
* Essential for modeling approval, validation, and decision scenarios

Correct use of Exclusive Gateways ensures **clear, deterministic, and predictable process behavior** within ONEWEB Process Designer.


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