What is a Node?

In KNIME terminology, a node is similar to a function in programming which identifies the algorithm, inputs and outputs associated with that node.

How to configure a Node?

When a node is dragged to the workflow or is connected, it shows the red status light indicating that it needs to be configured, i.e. the dialog has to be opened. This can be done by either double-clicking the node or by right-clicking the node to open the context menu. The first entry of the context menu is “Configure”, which opens the dialog. If the node is selected you can also choose the related button from the toolbar above the editor.

How to execute a Node?

In the next step, you probably want to execute the node to perform the desired task. To achieve this right-click the node in order to open the context menu and select “Execute”. You can also choose the related button from the toolbar. Please note that it is not necessary to execute every single node: if you execute the last node of connected but not yet executed nodes, all predecessor nodes will be executed before the last node is executed

The following video show you quickly how to create, configure, reset and execute a node.

What is a Meta Node?

Meta nodes look like normal nodes, although they contain other nodes inside them. In order to open a meta node you can either double-click it or choose “Open Subworkflow editor” from its context menu.

How to create your own node?

Since OSA is open-source, you can create your own node to extend functionality of OSA. For a tutorial example on how to create a new KNIME node, click here .