Node Connectivity
There are 205 nodes that can be used as predessesor
for a node with an input port of type 
Flow Variable.
Date&Time Input (legacy)
Outputs a date&time in a string flow variable with a given value.
Double Input (legacy)
Outputs a double-precision floating point variable with a given value.
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.
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.
Single Selection (legacy)
Allows selecting single value from a list of String which is returned as a String flow variable.
Value Selection (legacy)
Takes a data table and a selected column and returns a variable with the selected value from this column.