Fixes to property definitions

schemas/src/defs/v1.2/properties/optimade/structures/nelements.yaml

@@ -5,7 +5,7 @@ x-optimade-type: "integer"
 x-optimade-definition:
   label: "nelements_optimade_structures"
   kind: "property"
-  version: "1.2.0"
+  version: "1.2.1"
   format: "1.2"
   name: "nelements"
 type:
@@ -26,7 +26,3 @@ description: |-
 examples:
   - 3
 x-optimade-unit: "dimensionless"
-x-optimade-requirements:
-  support: "should"
-  sortable: false
-  query-support: "all mandatory"

schemas/src/defs/v1.2/properties/optimade/structures/space_group_it_number.yaml

@@ -5,7 +5,7 @@ x-optimade-type: "integer"
 x-optimade-definition:
   label: "space_group_it_number_optimade_structures"
   kind: "property"
-  version: "1.2.0"
+  version: "1.2.1"
   format: "1.2"
   name: "space_group_it_number"
 type:
@@ -20,4 +20,4 @@ description: |-
   - MUST be `null` if `nperiodic_dimensions` is not equal to 3.
 examples:
   - 42
-x-optimade-unit: "unapplicable"
+x-optimade-unit: "inapplicable"

schemas/src/defs/v1.2/properties/optimade/structures/space_group_symbol_hall.yaml

@@ -5,7 +5,7 @@ x-optimade-type: "string"
 x-optimade-definition:
   label: "space_group_symbol_hall_optimade_structures"
   kind: "property"
-  version: "1.2.0"
+  version: "1.2.1"
   format: "1.2"
   name: "space_group_symbol_hall"
 type:
@@ -43,4 +43,4 @@ examples:
   - "-I 4db 2ab 3"
   - "P 2yb (-1/2*x+z,1/2*x,y)"
   - "-I 4 2 (1/2*x+1/2*y,-1/2*x+1/2*y,z)"
-x-optimade-unit: "unapplicable"
+x-optimade-unit: "inapplicable"

schemas/src/defs/v1.2/properties/optimade/structures/space_group_symbol_hermann_mauguin.yaml

@@ -5,7 +5,7 @@ x-optimade-type: "string"
 x-optimade-definition:
   label: "space_group_symbol_hermann_mauguin_optimade_structures"
   kind: "property"
-  version: "1.2.0"
+  version: "1.2.1"
   format: "1.2"
   name: "space_group_symbol_hermann_mauguin"
 type:
@@ -32,4 +32,4 @@ description: |-
 examples:
   - "C 2"
   - "P 21 21 21"
-x-optimade-unit: "unapplicable"
+x-optimade-unit: "inapplicable"

schemas/src/defs/v1.2/properties/optimade/structures/space_group_symbol_hermann_mauguin_extended.yaml

@@ -5,7 +5,7 @@ x-optimade-type: "string"
 x-optimade-definition:
   label: "space_group_symbol_hermann_mauguin_extended_optimade_structures"
   kind: "property"
-  version: "1.2.0"
+  version: "1.2.1"
   format: "1.2"
   name: "space_group_symbol_hermann_mauguin_extended"
 type:
@@ -28,4 +28,4 @@ description: |-
   - IUCr (2005). International Tables for Crystallography vol. A. Space-Group Symmetry. Ed. Theo Hahn. 5-th edition. Dordrecht, Springer.
 examples:
   - "C 1 2 1"
-x-optimade-unit: "unapplicable"
+x-optimade-unit: "inapplicable"

schemas/src/defs/v1.2/properties/optimade/structures/space_group_symmetry_operations_xyz.yaml

@@ -5,9 +5,11 @@ x-optimade-type: "list"
 x-optimade-definition:
   label: "space_group_symmetry_operations_xyz_optimade_structures"
   kind: "property"
-  version: "1.2.0"
+  version: "1.2.1"
   format: "1.2"
   name: "space_group_symmetry_operations_xyz"
+x-optimade-dimensions:
+  names: ["dim_symops"]
 type:
   - "array"
   - "null"
@@ -45,6 +47,6 @@ description: |-
 examples:
   - ["x,y,z", "-x,y,-z"]
   - ["x,y,z", "-x,y,-z", "x+1/2,y+1/2,z", "-x+1/2,y+1/2,-z"]
-x-optimade-unit: "unapplicable"
+x-optimade-unit: "inapplicable"
 items:
   $$inherit: "/v1.2/properties/optimade/common/space_group_symmetry_operation_xyz"

schemas/src/defs/v1.3/properties/optimade/structures/fractional_site_positions.yaml

@@ -1,6 +1,6 @@
 $$schema: "https://schemas.optimade.org/meta/v1.2/optimade/property_definition"
 $id: "https://schemas.optimade.org/defs/v1.3/properties/optimade/structures/fractional_site_positions"
-title: "Fractional site positions"
+title: "fractional site positions"
 x-optimade-type: "list"
 x-optimade-definition:
   label: "fractional_site_positions_optimade_structures"

schemas/src/defs/v1.3/properties/optimade/structures/optimization_type.yaml

@@ -1,6 +1,6 @@
 $$schema: "https://schemas.optimade.org/meta/v1.2/optimade/property_definition"
 $id: "https://schemas.optimade.org/defs/v1.3/properties/optimade/structures/optimization_type"
-title: "Optimization type"
+title: "optimization type"
 x-optimade-type: "string"
 x-optimade-definition:
   label: "optimization_type_optimade_structures"

schemas/src/defs/v1.3/properties/optimade/structures/site_coordinate_span.yaml

@@ -1,6 +1,6 @@
 $$schema: "https://schemas.optimade.org/meta/v1.2/optimade/property_definition"
 $id: "https://schemas.optimade.org/defs/v1.3/properties/optimade/structures/site_coordinate_span"
-title: "Site coordinate span"
+title: "site coordinate span"
 x-optimade-type: "string"
 x-optimade-definition:
   label: "site_coordinate_span_optimade_structures"
@@ -50,6 +50,9 @@ description: |-
   European Mathematical Society (2020). Fundamental domain. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Fundamental_domain&oldid=47023 [accessed 2025-04-30T08:53+03:00].
 
   IUCr (2017). Asymmetric unit. Online Dictionary of Crystallography, URL: https://dictionary.iucr.org/Asymmetric_unit [accessed 2025-04-30T09:01+03:00].
+examples:
+  - asymmetric_unit
+  - unit_cell
 x-optimade-unit: "inapplicable"
 enum:
   - fundamental_domain

schemas/src/defs/v1.3/properties/optimade/structures/site_coordinate_span_description.yaml

@@ -1,6 +1,6 @@
 $$schema: "https://schemas.optimade.org/meta/v1.2/optimade/property_definition"
 $id: "https://schemas.optimade.org/defs/v1.3/properties/optimade/structures/site_coordinate_span_description"
-title: "Site coordinate span description"
+title: "site coordinate span description"
 x-optimade-type: "string"
 x-optimade-definition:
   label: "site_coordinate_span_description_optimade_structures"

schemas/src/defs/v1.3/properties/optimade/structures/wyckoff_positions.yaml

@@ -10,6 +10,7 @@ x-optimade-definition:
   name: "wyckoff_positions"
 x-optimade-dimensions:
   names: ["dim_sites"]
+  sizes: [null]
 type:
   - "array"
   - "null"

schemas/src/meta/v1.3/optimade/property_definition.yaml

@@ -274,6 +274,7 @@ $defs:
           Instead, provide information on the length of a list for an implementation to validate. This is communicated in the `sizes` subfield of this field. At this time, `sizes` can only specify a fixed length requirement.
         type: object
         additionalProperties: false
+        required: ['names', 'sizes']
         patternProperties:
           "^x-(?!optimade-)": {}
         properties:
@@ -295,6 +296,21 @@ $defs:
               type:
                 - "integer"
                 - "null"
+          compactable:
+            description: |-
+              For each dimension, defines whether the data can be written in a compact form along that dimension.
+              If the value is `"no"` for one given dimension, the standard rules to represent lists apply (i.e., the server CANNOT express that property using a compact format).
+              If the value is any other string for one given dimension (currently, only the string `"constant"` is supported), the server MAY decide to express the data in the response using the compact format defined by that string.
+              If it decides not to do so, then it MUST use the standard rules to represent lists.
+              If `compactable` is provided, then a value MUST be given for each dimension.
+              If `compactable` is not provided, then the default value is `"no"` for each dimension.
+            type: array
+            items:
+              type:
+                - string
+              enum:
+                - "constant"
+                - "no"
       x-optimade-unit-definitions:
         type: array
         items: