Welcome
Customizing the System
This section guides developers on customizing and extending Detect solutions. It covers the solution's folder structure, configuration files, integration methods, and provides insights into the Detect Expression Language and its built-in functions.
Detect Expression Language
Logical Operations

Getting Started
Welcome to the documentation for HCL Detect, where you can find information about how to install, maintain, and use this service.
Installation
Learn more about HCL Detect installation and deploying core components of the product.
Administration
Learn about how to configure, manage, and maintain HCL Detect environments. It includes details on system setup, user management, and permissions, ensuring seamless operation and efficient deployment of your continuous delivery processes.
Working with the System
The section provides comprehensive instructions for creating, configuring, and managing marketing events. It covers topics such as defining audience conditions, setting up triggers, deploying events, and tracking their performance. Additionally, this section includes explanations of key terminology and offers advanced options to optimize event management.
Customizing the System
This section guides developers on customizing and extending Detect solutions. It covers the solution's folder structure, configuration files, integration methods, and provides insights into the Detect Expression Language and its built-in functions.
- Folder Structure
  This section provides an overview of the basic solution folder structure. It describes the contents of each folder and their purpose.
- GDPR Tool
  This section explains on how to securely deleting user data from the system.
- drive.json File
  This page explains the structure and purpose of the drive.json file used in HCL Detect. It outlines required configurations including database settings, user profiles, communication parameters, system health metrics, and other operational settings. Proper setup of this file is essential before launching the application.
- Configurations
- Deploy Feed Application
  This page explains how to add a new feed application to Detect. Feed applications ingest data, process it through parsing, aggregation, and enrichment stages, and provide structured inputs for event detection.
- Integrations
- Solution Source Code
  This page outlines the structure and components of a solution source in HCL Detect. It details how solutions are packaged, including profiles, feed models, applications, and configurations, enabling deployment and reuse across different environments.
- Detect Expression Language
- Detect Expression Language Built-in Functions
System Data Model
This section provides detailed information about the internal tables used within the Detect module. It includes descriptions of each table's structure, purpose, and relationships, aiding administrators and developers in understanding and managing the underlying database schema effectively.

Logical Operations

An expression in HCL Detect Expression Language can contain the basic logical operations: logical and (&&) and logical or (||) with the usual semantics. These are binary operations that expect sub-expressions of type Bool on each side. Shortcutting is used to evaluate the logical operations. For logical and, if the sub-expression on the left evaluates to false, then the sub-expression on the right is not evaluated and the result is false. For logical or, if the sub-expression on the left evaluates to true, then the sub-expression on the right is not evaluated and the result is true. An expression in HCL Detect Expression Language can also contain the not (!) operator, which is a unary operator that expects a sub-expression of type Bool on the right.

Examples:

A simple logical expression: 3>5||2<4
A logical expression that uses not: !(3>5)