add_dimension: Clarified that type spatial always adds a spatial di…

…mension for the `z` axis.

CHANGELOG.md

@@ -15,6 +15,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 - Clarified for various mathematical functions the defined input and output ranges. Mention that `NaN` is returned outside of the defined input range where possible.
+- `add_dimension`: Clarified that type spatial always adds a spatial dimension for the `z` axis.
 - `aggregate_temporal` and `aggregate_temporal_period`: Clarified that the process throws a `DimensionNotAvailable` exception when no temporal dimension exists.
 - `aggregate_temporal_period`: Removed unused exception `DistinctDimensionLabelsRequired`
 - `aggregate_temporal_period`: Clarified that the definition of weeks follows ISO 8601

add_dimension.json

@@ -35,7 +35,7 @@
         },
         {
             "name": "type",
-            "description": "The type of dimension, defaults to `other`.",
+            "description": "The type of dimension, defaults to `other`.\n\nIf the type is `spatial`, the axis is always `z`, spatial dimensions for `x` and `y` can't be added through this process.",
             "schema": {
                 "type": "string",
                 "enum": [