LOT Syntax Reference
This page provides an overview of the LOT (Language of Things) syntax categories, aligning with the concepts presented in the LOT-Samples Repository.
LOT is designed to be human-readable with a near-English syntax that makes IoT system definitions more accessible. The language differentiates between Entities (subjects or data) and Functional Keywords (imperative actions performed by the MQTT broker).
Syntax Categories
The LOT syntax is organized based on this distinction:
Entities (Subjects/Data)
Entities represent the subjects or objects within the system, such as payloads, topics, timestamps, and structured data types. They are always described in an affirmative form.
Examples include:
* PAYLOAD
* TOPIC
* TIMESTAMP
* EMPTY
View All Entities Documentation
Functional Keywords (Imperative Actions)
Functional keywords are commands that instruct the broker to perform specific operations. They use an imperative form because the broker itself is the actor performing these actions.
Examples include:
* PUBLISH TOPIC
* GET TOPIC
* KEEP TOPIC (if applicable)
* SET (if applicable)
View All Functional Keywords Documentation
Defining Constructs
These keywords define the main structural components of LOT: * DEFINE ACTION - Event-triggered operations * DEFINE MODEL - Data transformation components * DEFINE RULE - Access control and permissions * DEFINE ROUTE - System interconnections
Operators & Expressions
The operators and expressions that can be used within LOT statements:
LOT Version Compatibility
LOT keywords and features are supported by different versions of the Coreflux platform. Throughout the documentation, compatibility information is provided for each keyword in the following format:
| Feature | Since Version | Notes |
|---|---|---|
DEFINE ACTION |
??? | Core feature |
TIMESTAMP "ISO" |
??? | Added additional time formats |
ROUTE |
??? | Added broker bridging functionality |
For the most up-to-date compatibility information, please consult the Coreflux release notes.
LOT Samples Repository
For practical examples of these syntax elements in action, explore the LOT Samples Repository, which contains: