Node Connectivity
There are 1183 nodes that can be used as predessesor
for a node with an input port of type 
org.knime.core.node.port.AbstractSimplePortObject.
Import Database
Import a database backup file
Create Database Backup
Create a database backup
Metadata
Update metadata of a PDF file
Unlock PDF Forms
Remove read-only property from form fields
Extract Header
Grabs all JS from a PDF and returns a single JS file with all code
Replace and Invert Color
Replace-Invert Color PDF
Repair PDF
Repair a PDF file
Remove Blank Pages
Remove blank pages from a PDF file
Process PDF With OCR
Process PDF files with OCR using Tesseract
Flatten
Flatten PDF form fields or full page