When preparing and editing text documents (and potentially other types of document) it would be useful to have paragraph level metadata. The relevant fields would be name, description and purpose, and the metadata could be applied to paragraphs, lists, tables, images/diagrams/figures, titles, etc.
This metadata would allow the user to see an abstracted view, where just the names of the blocks of content would be displayed, rather than the actual content.
Additionally, the metadata could help with change control, as the edits could be recorded at the metadata level. For example: