Merge branch 'add-authors' of https://github.com/jo-mueller/ngff-spec into add-authors

Author: jo-mueller

examples/multiscales_strict/multiscales_example.json

@@ -39,10 +39,19 @@
                 {
                   // the voxel size for the second scale level (downscaled by a factor of 2 -> 1 micrometer)
                   // and the time unit (0.1 milliseconds), which is the same for each scale level
-                  "type": "scale",
-                  "scale": [0.1, 1.0, 1.0, 1.0, 1.0],
+                  "type": "sequence",
                   "input": {"path": "s1"},
-                  "output": {"name": "intrinsic"}
+                  "output": {"name": "intrinsic"},
+                  "transformations": [
+                    {
+                      "type": "scale",
+                      "scale": [0.1, 1.0, 1.0, 1.0, 1.0]
+                    },
+                    {
+                      "type": "translation",
+                      "translation": [0, 0, 0.25, 0.25, 0.25]
+                    }
+                  ]                  
                 }
               ]
             },
@@ -52,10 +61,19 @@
                 {
                   // the voxel size for the third scale level (downscaled by a factor of 4 -> 2 micrometer)
                   // and the time unit (0.1 milliseconds), which is the same for each scale level
-                  "type": "scale",
-                  "scale": [0.1, 1.0, 2.0, 2.0, 2.0],
+                  "type": "sequence",
                   "input": {"path": "s2"},
-                  "output": {"name": "intrinsic"}
+                  "output": {"name": "intrinsic"},
+                  "transformations": [
+                    {
+                      "type": "scale",
+                      "scale": [0.1, 1.0, 2.0, 2.0, 2.0]
+                    },
+                    {
+                      "type": "translation",
+                      "translation": [0, 0, 0.75, 0.75, 0.75]
+                    }
+                  ]
                 }
               ]
             }

examples/multiscales_strict/multiscales_example_relative.json

@@ -39,22 +39,42 @@
         },
         {
           "path": "s1",
-          "coordinateTransformations": [{
-            // the second scale level (downscaled by a factor of 2 relative to "s0" in zyx)
-            "type": "scale",
-            "scale": [1, 1, 2, 2, 2],
-            "input" : {"path": "s1"},
-            "output" : {"name": "intrinsic"}
-          }]
+          "coordinateTransformations": [
+             {
+              // the second scale level (downscaled by a factor of 2 relative to "s0" in zyx)
+              "type": "sequence",
+              "input" : {"path": "s1"},
+              "output" : {"name": "intrinsic"},
+              "transformations": [
+                {
+                  "type": "scale",
+                  "scale": [1, 1, 2, 2, 2]
+                },
+                {
+                  "type": "translation",
+                  "translation": [0, 0, 0.5, 0.5, 0.5]
+                }
+              ]
+            }
+          ]
         },
         {
           "path": "s2",
           "coordinateTransformations": [{
             // the third scale level (downscaled by a factor of 4 relative to "s0" in zyx)
-            "type": "scale",
-            "scale": [1, 1, 4, 4, 4],
+            "type": "sequence",
             "input" : {"path": "s2"},
-            "output" : {"name": "intrinsic"}
+            "output" : {"name": "intrinsic"},
+            "transformations": [
+              {
+                "type": "scale",
+                "scale": [1, 1, 4, 4, 4]
+              },
+              {
+                "type": "translation",
+                "translation": [0, 0, 1.5, 1.5, 1.5]
+              }
+             ]
           }]
         }
       ],

index.md

@@ -1164,7 +1164,7 @@ Example metadata under the attributes of the zarr array at path `coordinateTrans
     "coordinateTransformations" : [
       {
         "type" : "identity",
-        "output" : "a coordinate field transform"
+        "output" : {"name": "a coordinate field transform"}
       }
     ]
   }
@@ -1227,7 +1227,7 @@ Example metadata under the attributes of the zarr array at path `displacements`
       {
         "type" : "scale",
         "scale" : [2, 1],
-        "output" : "a displacement field transform"
+        "output" : {"name": "a displacement field transform"}
       }
     ]
   }

version_history.md

@@ -8,11 +8,13 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
-## [0.6.dev3] - 2026-03-26
+## [0.6.dev4] - 2026-04-22
 
 ### Changed
 
 - BREAKING CHANGE: Unified `input` and `output` fields in all transformation metadata to be an object of `{"name": string, "path": string}` instead of allowing both string and object forms. This change was made to ensure consistency across all transformations and to simplify the specification.
+- BREAKING CHANGE: Replaced `arrayCoordinateSystems` with explanation of how to properly express dimensionless transforms.
+- style: Improved readability of multiscales section and `coordinates`/`displacements` transformations.
 
 ## [0.6.dev3] - 2026-03-13