Node Connectivity
There are 163 nodes that can be used as successor
for a node with an output port of type 
Flow Variable.
Try (Variable Ports)
Start of Try-Catch construct.
Active Branch Inverter
Inverts status of a branch: inactive becomes active and vice versa.
Container Input (Variable)
Injects flow variables optionally defined by a specification to the workflow.
Container Input (Variable) Deprecated
Injects flow variables to the workflow.
Container Output (File)
Makes a file in the workflow accessible to an external caller.
File Download Widget
Provides a download link to a file.
Text Output Widget (legacy)
Displays dynamic text.
File Download (legacy)
Provides a download link to a file.
Text Output (legacy)
Displays dynamic text in the KNIME WebPortal.
Block Programmatically (Variable)
Used in unit tests to pause the execution until a prgrammatic "release" is triggered.