license: built full stack, test and documentation

docs/user/index.md

@@ -0,0 +1,11 @@
+# User guide
+
+How to work with Dynamic Collection through the web interface: cataloguing
+artifacts and 3D models, uploading media, and administering the platform.
+
+## Chapters
+
+- **[Licenses](licenses.md)** — how records and media are licensed, which
+  options are available, and how to choose the right one.
+
+*More chapters will follow as the platform takes shape.*

docs/user/licenses.md

@@ -0,0 +1,66 @@
+# Licenses
+
+Every **record** (artifact or 3D model) and every **media file** (image,
+document, video) in Dynamic Collection carries a license that tells the world
+what can be done with it. This chapter explains the available options and how
+to choose.
+
+## Not everything is a license
+
+The platform distinguishes three kinds of entries:
+
+- **Licenses** grant permissions: the Creative Commons family (CC0, CC BY,
+  …). Choosing one tells reusers exactly what they are allowed to do.
+- **The Public Domain Mark** (PDM) declares that a work is *already* free of
+  known copyright — for instance because copyright has expired. It grants
+  nothing new; it labels an existing status.
+- **Rights statements** ([RightsStatements.org](https://rightsstatements.org))
+  label media that are closed or whose status is uncertain. Copyrighted
+  material is not "licensed": it is labelled with one of these (e.g. *In
+  Copyright*).
+
+## Records vs media
+
+**Records** must stay open — that is the point of publishing them — so only
+**CC0 1.0** and **CC BY 4.0** can be selected. **Media files** may need the
+full range, including closed options: a photograph may be under copyright
+even when the record describing the artifact is open.
+
+The forms only offer the options valid for what you are editing.
+
+!!! note "Editing existing content"
+    An edit form always includes the currently assigned license, even if an
+    administrator has since retired it: you are never forced to change the
+    license of existing content just to save an unrelated edit.
+
+## Available options
+
+From the most open to the most restrictive:
+
+| Option | Kind | What it means |
+|---|---|---|
+| PDM 1.0 | mark | Already free of known copyright worldwide (e.g. expired). |
+| CC0 1.0 | license | The rights holder waives all rights: any use, no attribution required. |
+| CC BY 4.0 | license | Any use, including commercial, with credit to the creator. |
+| CC BY-SA 4.0 | license | Like CC BY, but derivatives must keep the same license. |
+| CC BY-NC 4.0 | license | Reuse with attribution, non-commercial only. |
+| CC BY-NC-SA 4.0 | license | Non-commercial, with attribution, same license on derivatives. |
+| CC BY-ND 4.0 | license | Redistribution with attribution, but no derivative works. |
+| CC BY-NC-ND 4.0 | license | Most restrictive CC: share with credit, no changes, no commercial use. |
+| InC | rights statement | In copyright, all rights reserved: reuse requires permission. |
+| InC-EDU | rights statement | In copyright, but educational use is permitted. |
+| CNE | rights statement | Copyright not evaluated yet: treat as potentially protected. |
+
+Each option shows a short explanation in the form when selected. When media
+are downloaded, the zip archive includes the full legal text of the license
+(for CC licenses) or the canonical URI of the statement.
+
+## For administrators
+
+Licenses are managed from the admin panel:
+
+- **Add** further entries when needed — for example other RightsStatements.org
+  statements (*InC-NC*, *NoC-NC*, *NKC*, *UND*, …).
+- **Retire** an option by deactivating it: it disappears from the forms but
+  remains valid for the content that already uses it. This is always
+  preferable to deletion, which is only possible for entries not in use.