Thanks for clarification.
The field is not intended to store data blobs, but rather a list of homogenous portions of information that is meant to be linked to a product key. The number of items and their values are specific to each product key, we cannot replace the list with a fixed set of fields.
The list It is going to be initialized and maintained by hand. For maintenance of the list, it would be convenient to have each entry in a separate line, but the text control is not multiline and it converts newlines to spaces on pasting the text.
If there is no way to include a newline in the text, we will need to use some other separator and do text replace before and after editing the list.