Node Connectivity
There are 5522 nodes that can be used as predessesor
for a node with an input port of type 
Generic Port.
Double Input (legacy)
Outputs a double-precision floating point variable with a given value.
File Chooser (legacy)
Quickform node that allows choosing single or multiple files, workflows or directories from a remote mountpoint.
File Upload (legacy)
Quick Form node that allows uploading a file and exposing that uploaded file using a flow variable.
Integer Input (legacy)
Outputs an integer flow variable with a given value.
List Box Input (legacy)
Outputs a data table with one column holding a list of strings.
Molecule String Input (legacy)
Outputs a molecule string in the specified format.
Slider Input (legacy)
Outputs a double-precision floating point variable with a given value.
String Input (legacy)
Outputs a string flow variable with a given value.
Column Selection (legacy)
Takes a data table and returns a variable with the selected column name.
Multiple Selections (legacy)
Allows selecting multiple values from a list of String which is returned as a data table and String flow variable.