Replay packs under CC-BY-NC-SA-4.0 OR commercial

LICENSING.md

@@ -0,0 +1,30 @@
+# Licensing
+
+The replay packs of this dataset are dual-licensed.
+
+## Research and non-profit use — CC BY-NC-SA 4.0
+
+The packs, their manifest and their certificates are available under the
+[Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License](https://creativecommons.org/licenses/by-nc-sa/4.0/).
+You may download, replay, redistribute and build upon them for research, teaching and any other non-commercial
+purpose, as long as you credit this dataset and its source geometry (the `citation` field of every pack) and
+release what you build upon them under the same terms.
+
+## Commercial use
+
+A commercial licence is available under separately negotiated terms for use that makes money: inside a product,
+a paid service, contract research, or the training of a model that is sold. It lifts the non-commercial and
+share-alike obligations.
+
+📧 **rutger.fick@dmrai-lab.org**
+
+## What the licence covers, and what it does not
+
+The licence covers the simulated records in the packs: the walkers' paths, occupancies, wall contacts and field
+samples, their coefficients, and the certificates. The **source geometry** each pack was simulated on keeps its
+own licence, recorded in the pack's `license` field and in the manifest, and this dataset never relicenses it.
+The replay-pack **format** is a separate, openly licensed specification (CC-BY-4.0 text, Apache-2.0 reference code):
+anyone may produce and read packs under their own terms.
+
+Copies of a pack obtained under an earlier licence of this dataset keep that licence; these terms apply from the
+revision that carries this file.

README.md

@@ -1,5 +1,7 @@
 ---
-license: cc-by-4.0
+license:
+  - cc-by-nc-sa-4.0
+  - other
 pretty_name: ling-sand-packs
 ---
 
@@ -160,3 +162,7 @@ print("T2 log-mean %.1f ms" % (1e3 * log_mean_T2(g, t2_distribution(t[every::eve
 * the packs: CC-BY-4.0 images and echo trains; the packs are CC-BY-4.0 and no byte of the deposit is redistributed
 
 *Rendered by `dmipy_sim.replay.reference` from this dataset's `records/`. A bare republish of a pack regenerates the manifest-only card of `dmipy_sim.replay.publish` and drops this one; the protocol's publish stage writes this file last.*
+
+## Licence
+
+The packs are distributed under `CC-BY-NC-SA-4.0 OR LicenseRef-Commercial` (see `LICENSING.md`): CC BY-NC-SA 4.0 for research and non-profit use, a commercial licence on request. The source geometry of each pack keeps its own licence, recorded in the pack's `license` field: cc-by-4.0; the format never relicenses a source.

manifest.json

@@ -36,7 +36,8 @@
      }
     ]
    },
-   "window_bytes": 49921184
+   "window_bytes": 49921184,
+   "pack_license": "CC-BY-NC-SA-4.0 OR LicenseRef-Commercial"
   },
   {
    "id": "ling-sand-packs/5_q75g25",
@@ -73,7 +74,8 @@
      }
     ]
    },
-   "window_bytes": 49921184
+   "window_bytes": 49921184,
+   "pack_license": "CC-BY-NC-SA-4.0 OR LicenseRef-Commercial"
   },
   {
    "id": "ling-sand-packs/4_q50g50",
@@ -110,7 +112,8 @@
      }
     ]
    },
-   "window_bytes": 49921184
+   "window_bytes": 49921184,
+   "pack_license": "CC-BY-NC-SA-4.0 OR LicenseRef-Commercial"
   },
   {
    "id": "ling-sand-packs/2_q25g75",
@@ -147,7 +150,8 @@
      }
     ]
    },
-   "window_bytes": 49921184
+   "window_bytes": 49921184,
+   "pack_license": "CC-BY-NC-SA-4.0 OR LicenseRef-Commercial"
   },
   {
    "id": "ling-sand-packs/1_g100",
@@ -184,7 +188,8 @@
      }
     ]
    },
-   "window_bytes": 49921184
+   "window_bytes": 49921184,
+   "pack_license": "CC-BY-NC-SA-4.0 OR LicenseRef-Commercial"
   }
  ],
  "substrate": {