Workflows

Workflows are Machine Learning programs designed to solve a specific task. They act as the entry point to start execution. Workflows are not meant to be reusable, instead extract reusable code into a step.

Syntax

Minimal Example

Let's look at a minimal example of a workflow:

workflow predictSpeed {}

This declaration of a workflow has the following syntactic elements:

• The keyword workflow.
• The name of the workflow, here predictSpeed, which can be any combination of upper- and lowercase letters, underscores, and numbers, as long as it does not start with a number. However, we suggest to use lowerCamelCase for the names of workflows.
• The body of the workflow, which contains the statements that should be run when the workflow is executed. The body is delimited by curly braces. In this example, the body is empty, so running this workflow does nothing.

Statements

In order to describe what should be done when the workflow is executed, we need to add statements to its body, as shown in this example:

workflow predictSpeed {
    val dataset = loadDataset("SpeedAverages");
    val sample = dataset.sample(1000);

    // …
}

More information about statements can be found in the linked document. Note particularly, that all statements must end with a semicolon.