Add optional measurementType field in Parameter

pyproject.toml

@@ -20,7 +20,7 @@ classifiers = [
     "Topic :: Scientific/Engineering :: GIS",
     "Typing :: Typed",
 ]
-version = "0.3.0"
+version = "0.4.0"
 dependencies = ["pydantic>=2.3,<3"]
 
 [project.optional-dependencies]

src/edr_pydantic/parameter.py

@@ -11,13 +11,22 @@
 from .unit import Unit
 
 
+class MeasurementType(EdrBaseModel):
+    method: str
+    # TODO: Add validation of ISO 8601 duration (including leading minus sign)
+    # TODO: Confusion in spec on the field name, duration versus period.
+    #  See https://github.com/opengeospatial/ogcapi-environmental-data-retrieval/issues/560
+    period: str
+
+
 class Parameter(EdrBaseModel, extra="allow"):
     type: Literal["Parameter"] = "Parameter"
     id: Optional[str] = None
     label: Optional[str] = None
     description: Optional[str] = None
     unit: Optional[Unit] = None
     observedProperty: ObservedProperty  # noqa: N815
+    measurementType: Optional[MeasurementType] = None  # noqa: N815
 
     @model_validator(mode="after")
     def must_not_have_unit_if_observed_property_has_categories(self):

tests/test_data/parameter-names.json

@@ -0,0 +1,59 @@
+{
+    "Temperature_altitude_above_msl": {
+        "type": "Parameter",
+        "description": "Temperature for Specific altitude above MSL",
+        "unit": {
+            "label": "K",
+            "symbol": {
+                "value": "K",
+                "type": "http://qudt.org/vocab/unit/K"
+            }
+        },
+        "observedProperty": {
+            "id": "http://codes.wmo.int/grib2/codeflag/4.2/_0-0-0",
+            "label": "Temperature_altitude_above_msl"
+        },
+        "measurementType": {
+            "method": "instantaneous",
+            "period": "PT0S"
+        }
+    },
+    "u-component_of_wind_altitude_above_msl": {
+        "type": "Parameter",
+        "description": "u-component of wind for Specific altitude above MSL",
+        "unit": {
+            "label": "m/s",
+            "symbol": {
+                "value": "m%20s",
+                "type": "http://qudt.org/vocab/unit/M-PER-SEC.html"
+            }
+        },
+        "observedProperty": {
+            "id": "http://codes.wmo.int/grib2/codeflag/4.2/_0-2-2",
+            "label": "u-component_of_wind_altitude_above_msl"
+        },
+        "measurementType": {
+            "method": "instantaneous",
+            "period": "PT0S"
+        }
+    },
+    "v-component_of_wind_altitude_above_msl": {
+        "type": "Parameter",
+        "description": "v-component of wind for Specific altitude above MSL",
+        "unit": {
+            "label": "m/s",
+            "symbol": {
+                "value": "m%20s",
+                "type": "http://qudt.org/vocab/unit/M-PER-SEC.html"
+            }
+        },
+        "observedProperty": {
+            "id": "http://codes.wmo.int/grib2/codeflag/4.2/_0-2-3",
+            "label": "v-component_of_wind_altitude_above_msl"
+        },
+        "measurementType": {
+            "method": "instantaneous",
+            "period": "PT0S"
+        }
+    }
+}

tests/test_edr.py

@@ -1,12 +1,15 @@
 import json
 from pathlib import Path
+from typing import Dict
 
 import pytest
 from edr_pydantic.capabilities import LandingPageModel
 from edr_pydantic.collections import Collections
 from edr_pydantic.collections import Instance
 from edr_pydantic.extent import Extent
+from edr_pydantic.parameter import Parameter
 from edr_pydantic.unit import Unit
+from pydantic import RootModel
 from pydantic import ValidationError
 
 happy_cases = [
@@ -15,6 +18,7 @@
     ("simple-instance.json", Instance),
     ("landing-page.json", LandingPageModel),
     ("doc-example-extent.json", Extent),
+    ("parameter-names.json", RootModel[Dict[str, Parameter]]),
 ]