Hi,
Thanks for using and reporting back.
- Create first the metadata type with the look up of suppliers as a comma delimited line.
- Make a relation between the selected document type and the metadata type "suppliers".
- Create an index and add a new tree node template with the content: {{ document.metadata_value_of.supplier }} and enable "Link documents" checkmark
- Create a relation between the "suppliers" index and the selected document types
- Add the "supplier" metadata to a document, whose document type has been related to the "suppliers" index.
- Go to "Tools" and click on "Rebuild Indexes" and check the "Indexes" main menu link.
- If it worked as expected, new documents or "suppliers" metadata edit will now trigger the index update.
See included screenshots for a related example.