Find and use data.world Community nodes.
You can find all relevant data.world nodes under Community Nodes in the KNIME Node Repository:
Expand Community Nodes from the Node Repository sidebar, then expand the options for data.world.
Now you can use the data.world nodes to:
Read Tables from a specified data.world dataset.
Upload files to a data.world dataset (you can batch upload any files supported by data.world)
Upload a table to a data.world dataset.