# Publication Model

> The Storyblok publication model that drives sb-mig 6.x migration behavior.
Storyblok stories can represent draft and published content at the same time.

## Story states [#story-states]

| State               | Meaning                                                        |
| ------------------- | -------------------------------------------------------------- |
| `draft-only`        | The story is not published.                                    |
| `clean-published`   | The story is published and draft/current matches production.   |
| `dirty-published`   | The story is published and has unpublished draft changes.      |
| `published-unknown` | The story is published but publication metadata is incomplete. |

## Why this matters [#why-this-matters]

Dirty published stories are the dangerous case. Editors have live production content and newer saved draft edits. A migration must not accidentally publish those saved draft edits.

## sb-mig modes [#sb-mig-modes]

`preserve-layers` migrates draft/current and published content separately for dirty published stories.

`collapse-draft` intentionally publishes latest draft/current content for stories that were already published.

`save-only` never publishes.