diff --git a/frontend/src/framework/EnsembleParameters.ts b/frontend/src/framework/EnsembleParameters.ts
index 87f6688eb..2dfed3cee 100644
--- a/frontend/src/framework/EnsembleParameters.ts
+++ b/frontend/src/framework/EnsembleParameters.ts
@@ -1,14 +1,78 @@
-export type Parameter = {
+import { MinMax } from "@lib/utils/MinMax";
+
+export enum ParameterType {
+    CONTINUOUS,
+    DISCRETE,
+}
+
+export type ContinuousParameter = {
+    readonly type: ParameterType.CONTINUOUS;
     readonly name: string;
-    readonly isLogarithmic: boolean;    // Only applicable for numerical/float arrays?
-    readonly isNumerical: boolean;
+    readonly groupName: string | null;
+    readonly description?: string;
     readonly isConstant: boolean;
-    readonly groupName?: string;
-    readonly descriptiveName?: string;
-    readonly realizations: number[];       // The two arrays, realizations and values, must always be same length
-    readonly values: number[] | string[];  // Array items can be string, int or float. Should probably be Float32Array, Int32Array or string[] instead.
+    readonly isLogarithmic: boolean;
+    readonly realizations: number[]; // The two arrays, realizations and values, must always be same length
+    readonly values: number[]; // Array items will be floating point.
 };
 
+export type DiscreteParameter = {
+    readonly type: ParameterType.DISCRETE;
+    readonly name: string;
+    readonly groupName: string | null;
+    readonly description?: string;
+    readonly isConstant: boolean;
+    readonly realizations: number[]; // The two arrays, realizations and values, must always be same length
+    readonly values: number[] | string[]; // Array items can be string or int. Should maybe utilize Int32Array or string[] instead?
+};
+
+export type Parameter = ContinuousParameter | DiscreteParameter;
+
+export class ParameterIdent {
+    readonly name: string;
+    readonly groupName: string | null;
+
+    constructor(name: string, groupName: string | null) {
+        this.name = name;
+        this.groupName = groupName;
+    }
+
+    static fromNameAndGroup(name: string, groupName: string | null): ParameterIdent {
+        return new ParameterIdent(name, groupName);
+    }
+
+    static fromString(paramIdentString: string): ParameterIdent {
+        const parts = paramIdentString.split("~@@~");
+        if (parts.length === 1) {
+            return new ParameterIdent(parts[0], null);
+        }
+        if (parts.length === 2) {
+            return new ParameterIdent(parts[0], parts[1]);
+        } 
+
+        throw new Error(`Invalid parameter ident string: ${paramIdentString}`);
+    }
+
+    toString(): string {
+        if (this.groupName) {
+            return `${this.name}~@@~${this.groupName}`;
+        } else {
+            return this.name;
+        }
+    }
+
+    equals(otherIdent: ParameterIdent | null): boolean {
+        if (!otherIdent) {
+            return false;
+        }
+        if (otherIdent === this) {
+            return true;
+        }
+
+        return this.name === otherIdent.name && this.groupName === otherIdent.groupName;
+    }
+}
+
 export class EnsembleParameters {
     private _parameterArr: Parameter[];
 
@@ -16,8 +80,46 @@ export class EnsembleParameters {
         this._parameterArr = parameterArr;
     }
 
-    getParameterNames(): string[] {
-        return this._parameterArr.map((par) => par.name);
+    getParameterIdents(requiredParamType: ParameterType | null): ParameterIdent[] {
+        const identArr: ParameterIdent[] = [];
+        for (const par of this._parameterArr) {
+            if (requiredParamType == null || par.type === requiredParamType) {
+                identArr.push(new ParameterIdent(par.name, par.groupName));
+            }
+        }
+
+        return identArr;
+    }
+
+    hasParameter(paramIdent: ParameterIdent): boolean {
+        return this.findParameter(paramIdent) !== null;
+    }
+
+    getParameter(paramIdent: ParameterIdent): Parameter {
+        const par = this.findParameter(paramIdent);
+        if (!par) {
+            throw new Error(`Parameter ${paramIdent.name} (group=${paramIdent.groupName}) not found`);
+        }
+        return par;
+    }
+
+    getContinuousParameterMinMax(paramIdent: ParameterIdent): MinMax {
+        const par = this.getParameter(paramIdent);
+        if (par.type !== ParameterType.CONTINUOUS) {
+            throw new Error(`Parameter ${paramIdent.name} (group=${paramIdent.groupName}) is not of type continuous`);
+        }
+
+        return MinMax.fromNumericValues(par.values);
+    }
+
+    findParameter(paramIdent: ParameterIdent): Parameter | null {
+        for (const par of this._parameterArr) {
+            if (par.name === paramIdent.name && par.groupName === paramIdent.groupName) {
+                return par;
+            }
+        }
+
+        return null;
     }
 
     getParameterArr(): readonly Parameter[] {
diff --git a/frontend/src/framework/internal/EnsembleSetLoader.ts b/frontend/src/framework/internal/EnsembleSetLoader.ts
index 4fbffdd6b..a9d4ef14c 100644
--- a/frontend/src/framework/internal/EnsembleSetLoader.ts
+++ b/frontend/src/framework/internal/EnsembleSetLoader.ts
@@ -4,7 +4,7 @@ import { QueryClient } from "@tanstack/react-query";
 
 import { Ensemble } from "../Ensemble";
 import { EnsembleIdent } from "../EnsembleIdent";
-import { Parameter } from "../EnsembleParameters";
+import { Parameter, ParameterType, ContinuousParameter, DiscreteParameter } from "../EnsembleParameters";
 import { Sensitivity, SensitivityCase } from "../EnsembleSensitivities";
 import { EnsembleSet } from "../EnsembleSet";
 
@@ -129,16 +129,31 @@ function buildParameterArrFromApiResponse(apiParameterArr: EnsembleParameter_api
     const retParameterArr: Parameter[] = [];
 
     for (const apiPar of apiParameterArr) {
-        retParameterArr.push({
-            name: apiPar.name,
-            isLogarithmic: apiPar.is_logarithmic,
-            isNumerical: apiPar.is_numerical,
-            isConstant: apiPar.is_constant,
-            groupName: apiPar.group_name,
-            descriptiveName: apiPar.descriptive_name,
-            realizations: apiPar.realizations,
-            values: apiPar.values,
-        });
+        if (apiPar.is_numerical) {
+            const retPar: ContinuousParameter = {
+                type: ParameterType.CONTINUOUS,
+                name: apiPar.name,
+                groupName: apiPar.group_name ?? null,
+                description: apiPar.descriptive_name,
+                isConstant: apiPar.is_constant,
+                isLogarithmic: apiPar.is_logarithmic,
+                realizations: apiPar.realizations,
+                values: apiPar.values as number[],
+            };
+            retParameterArr.push(retPar);
+        }
+        else {
+            const retPar: DiscreteParameter = {
+                type: ParameterType.DISCRETE,
+                name: apiPar.name,
+                groupName: apiPar.group_name ?? null,
+                description: apiPar.descriptive_name,
+                isConstant: apiPar.is_constant,
+                realizations: apiPar.realizations,
+                values: apiPar.values,
+            };
+            retParameterArr.push(retPar);
+        }
     }
 
     return retParameterArr;
diff --git a/frontend/src/lib/utils/MinMax.ts b/frontend/src/lib/utils/MinMax.ts
new file mode 100644
index 000000000..c671a48a2
--- /dev/null
+++ b/frontend/src/lib/utils/MinMax.ts
@@ -0,0 +1,64 @@
+/**
+ * Immutable class for storing a min/max scalar range
+ */
+
+export class MinMax {
+    readonly min: number;
+    readonly max: number;
+
+    constructor(min: number, max: number) {
+        this.min = min;
+        this.max = max;
+    }
+
+    static createInvalid(): MinMax {
+        return new MinMax(Number.POSITIVE_INFINITY, Number.NEGATIVE_INFINITY);
+    }
+
+    static fromNumericValues(values: Iterable<number>): MinMax {
+        let min = Number.POSITIVE_INFINITY;
+        let max = Number.NEGATIVE_INFINITY;
+        for (const v of values) {
+            if (v < min) {
+                min = v;
+            }
+            if (v > max) {
+                max = v;
+            }
+        }
+
+        if (min <= max) {
+            return new MinMax(min, max);
+        } else {
+            return MinMax.createInvalid();
+        }
+    }
+
+    /**
+     * Returns a new MinMax object that is extend to include values from other min/max range
+     * Will handle invalid ranges (min > max) in both this and the other object.
+     */
+    extendedBy(otherMinMax: MinMax): MinMax {
+        if (!otherMinMax.isValid()) {
+            return new MinMax(this.min, this.max);
+        }
+        if (!this.isValid()) {
+            return new MinMax(otherMinMax.min, otherMinMax.max);
+        }
+
+        const newMin = Math.min(this.min, otherMinMax.min);
+        const newMax = Math.max(this.max, otherMinMax.max);
+        return new MinMax(newMin, newMax);
+    }
+
+    /**
+     * Returns true if the range is valid, i.e. if minimum <= maximum
+     */
+    isValid(): boolean {
+        if (this.min <= this.max) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+}
diff --git a/frontend/tests/unit-tests/EnsembleParameters.test.ts b/frontend/tests/unit-tests/EnsembleParameters.test.ts
new file mode 100644
index 000000000..a9f22d2fe
--- /dev/null
+++ b/frontend/tests/unit-tests/EnsembleParameters.test.ts
@@ -0,0 +1,127 @@
+import { EnsembleParameters, Parameter, ParameterIdent, ParameterType } from "@framework/EnsembleParameters";
+import { MinMax } from "@lib/utils/MinMax";
+
+// prettier-ignore
+const PARAM_ARR: Parameter[] = [
+    {type: ParameterType.CONTINUOUS, name: "cparam_10", groupName: null,   description: "desc10",   isConstant: false, isLogarithmic: false, realizations: [1,2,3], values: [11, 12, 19]},
+    {type: ParameterType.CONTINUOUS, name: "cparam_20", groupName: null,   description: "desc20",   isConstant: false, isLogarithmic: false, realizations: [1,2,3], values: [21, 22, 29]},
+    {type: ParameterType.CONTINUOUS, name: "cparam_50", groupName: "grp1", description: "desc50g1", isConstant: false, isLogarithmic: false, realizations: [1,2,3], values: [51, 52, 54]},
+    {type: ParameterType.CONTINUOUS, name: "cparam_50", groupName: "grp2", description: "desc50g2", isConstant: false, isLogarithmic: false, realizations: [1,2,3], values: [55, 56, 59]},
+
+    {type: ParameterType.DISCRETE, name: "dparam_A", groupName: null, description: "descA", isConstant: false, realizations: [1,2,3], values: [1, 2, 3]},
+    {type: ParameterType.DISCRETE, name: "dparam_B", groupName: null, description: "descB", isConstant: false, realizations: [1,2,3], values: ["A", "B", "C"]},
+];
+
+
+describe("EnsembleParameters tests", () => {
+    test("Get list of parameter idents", () => {
+        const ensParams = new EnsembleParameters(PARAM_ARR);
+        {
+            const allIdents = ensParams.getParameterIdents(null);
+            expect(allIdents.length).toEqual(6);
+            expect(allIdents[0]).toEqual(ParameterIdent.fromNameAndGroup("cparam_10", null));
+            expect(allIdents[1]).toEqual(ParameterIdent.fromNameAndGroup("cparam_20", null));
+            expect(allIdents[2]).toEqual(ParameterIdent.fromNameAndGroup("cparam_50", "grp1"));
+            expect(allIdents[3]).toEqual(ParameterIdent.fromNameAndGroup("cparam_50", "grp2"));
+            expect(allIdents[4]).toEqual(ParameterIdent.fromNameAndGroup("dparam_A", null));
+            expect(allIdents[5]).toEqual(ParameterIdent.fromNameAndGroup("dparam_B", null));
+        }
+        {
+            const contIdents = ensParams.getParameterIdents(ParameterType.CONTINUOUS);
+            expect(contIdents.length).toEqual(4);
+            expect(contIdents[0]).toEqual(ParameterIdent.fromNameAndGroup("cparam_10", null));
+            expect(contIdents[1]).toEqual(ParameterIdent.fromNameAndGroup("cparam_20", null));
+            expect(contIdents[2]).toEqual(ParameterIdent.fromNameAndGroup("cparam_50", "grp1"));
+            expect(contIdents[3]).toEqual(ParameterIdent.fromNameAndGroup("cparam_50", "grp2"));
+        }
+        {
+            const discIdents = ensParams.getParameterIdents(ParameterType.DISCRETE);
+            expect(discIdents.length).toEqual(2);
+            expect(discIdents[0]).toEqual(ParameterIdent.fromNameAndGroup("dparam_A", null));
+            expect(discIdents[1]).toEqual(ParameterIdent.fromNameAndGroup("dparam_B", null));
+        }
+    });
+
+    test("Check for parameter existence", () => {
+        const ensParams = new EnsembleParameters(PARAM_ARR);
+
+        expect(ensParams.hasParameter(ParameterIdent.fromNameAndGroup("cparam_10", null))).toBe(true);
+        expect(ensParams.hasParameter(ParameterIdent.fromNameAndGroup("cparam_50", "grp1"))).toBe(true);
+        expect(ensParams.hasParameter(ParameterIdent.fromNameAndGroup("cparam_50", "grp2"))).toBe(true);
+
+        expect(ensParams.hasParameter(ParameterIdent.fromNameAndGroup("aName", "aGroup"))).toBe(false);
+        expect(ensParams.hasParameter(ParameterIdent.fromNameAndGroup("", ""))).toBe(false);
+        expect(ensParams.hasParameter(ParameterIdent.fromNameAndGroup("cparam_10", ""))).toBe(false);
+        expect(ensParams.hasParameter(ParameterIdent.fromNameAndGroup("cparam_50", null))).toBe(false);
+    });
+
+    test("Get parameters", () => {
+        const ensParams = new EnsembleParameters(PARAM_ARR);
+        {
+            const par = ensParams.getParameter(ParameterIdent.fromNameAndGroup("cparam_10", null));
+            expect(par.type).toEqual(ParameterType.CONTINUOUS);
+            expect(par.name).toEqual("cparam_10");
+            expect(par.groupName).toEqual(null);
+            expect(par.values).toEqual([11, 12, 19]);
+        }
+        {
+            const par = ensParams.getParameter(ParameterIdent.fromNameAndGroup("cparam_50", "grp2"));
+            expect(par.type).toEqual(ParameterType.CONTINUOUS);
+            expect(par.name).toEqual("cparam_50");
+            expect(par.groupName).toEqual("grp2");
+            expect(par.values).toEqual([55, 56, 59]);
+        }
+        {
+            const par = ensParams.getParameter(ParameterIdent.fromNameAndGroup("dparam_B", null));
+            expect(par.type).toEqual(ParameterType.DISCRETE);
+            expect(par.name).toEqual("dparam_B");
+            expect(par.groupName).toEqual(null);
+            expect(par.values).toEqual(["A", "B", "C"]);
+        }
+    });
+
+    test("Check that getting non-existing parameter throws", () => {
+        const ensParams = new EnsembleParameters(PARAM_ARR);
+        expect(() => ensParams.getParameter(ParameterIdent.fromNameAndGroup("someBogusName", null))).toThrow();
+    });
+
+    test("Test getting min/max values for continuous parameter", () => {
+        const ensParams = new EnsembleParameters(PARAM_ARR);
+        {
+            const minMax = ensParams.getContinuousParameterMinMax(ParameterIdent.fromNameAndGroup("cparam_10", null));
+            expect(minMax).toEqual(new MinMax(11, 19));
+        }
+        {
+            const minMax = ensParams.getContinuousParameterMinMax(ParameterIdent.fromNameAndGroup("cparam_50", "grp1"));
+            expect(minMax).toEqual(new MinMax(51, 54));
+        }
+    });
+});
+
+
+describe("ParameterIdent tests", () => {
+    test("Conversion to/from string", () => {
+        {
+            const identStr = ParameterIdent.fromNameAndGroup("aName", "aGroup").toString();
+            const ident = ParameterIdent.fromString(identStr);
+            expect(ident.name).toEqual("aName");
+            expect(ident.groupName).toEqual("aGroup");
+        }
+        {
+            const identStr = ParameterIdent.fromNameAndGroup("aName", null).toString();
+            const ident = ParameterIdent.fromString(identStr);
+            expect(ident.name).toEqual("aName");
+            expect(ident.groupName).toEqual(null);
+        }
+    });
+
+    test("Check for equality", () => {
+        const identA = new ParameterIdent("aName", "aGroup");
+        const identB = new ParameterIdent("aName", "aGroup");
+        const identC = new ParameterIdent("anotherName", "anotherGroup");
+        expect(identA.equals(identA)).toBe(true);
+        expect(identA.equals(identB)).toBe(true);
+        expect(identA.equals(identC)).toBe(false);
+        expect(identA.equals(null)).toBe(false);
+    });
+});
diff --git a/frontend/tests/unit-tests/MinMax.test.ts b/frontend/tests/unit-tests/MinMax.test.ts
new file mode 100644
index 000000000..710e5733a
--- /dev/null
+++ b/frontend/tests/unit-tests/MinMax.test.ts
@@ -0,0 +1,42 @@
+import { MinMax } from "@lib/utils/MinMax";
+
+describe("MinMax tests", () => {
+    test("Check validity of MinMax instances", () => {
+        expect(new MinMax(0, 1).isValid()).toBe(true);
+        expect(new MinMax(-1, -1).isValid()).toBe(true);
+        expect(new MinMax(0, Number.POSITIVE_INFINITY).isValid()).toBe(true);
+        expect(new MinMax(Number.NEGATIVE_INFINITY, 0).isValid()).toBe(true);
+
+        expect(MinMax.createInvalid().isValid()).toBe(false);
+        expect(new MinMax(1, 0).isValid()).toBe(false);
+        expect(new MinMax(0, Number.NaN).isValid()).toBe(false);
+        expect(new MinMax(Number.NaN, 0).isValid()).toBe(false);
+        expect(new MinMax(Number.NaN, Number.NaN).isValid()).toBe(false);
+    });
+
+    test("Check construction from numeric values", () => {
+        expect(MinMax.fromNumericValues([]).isValid()).toBe(false);
+        expect(MinMax.fromNumericValues([1])).toEqual(new MinMax(1, 1));
+        expect(MinMax.fromNumericValues([0, 1, 2, 3, 4])).toEqual(new MinMax(0, 4));
+
+        expect(MinMax.fromNumericValues(new Float32Array([0, 1, 2, 3, 4]))).toEqual(new MinMax(0, 4));
+        expect(MinMax.fromNumericValues(new Set<number>([0, 1, 2, 3, 4]))).toEqual(new MinMax(0, 4));
+
+        const bogusArray = [1, undefined, 2, Number.NaN, 3, 4];
+        expect(MinMax.fromNumericValues(bogusArray as number[])).toEqual(new MinMax(1, 4));
+    });
+
+    test("Check extending by another MinMax object", () => {
+        const validMinMaxA = new MinMax(0, 1);
+        const validMinMaxB = new MinMax(10, 11);
+        const invalidMinMax = MinMax.createInvalid();
+
+        expect(validMinMaxA.extendedBy(validMinMaxA)).toEqual(validMinMaxA);
+        expect(invalidMinMax.extendedBy(validMinMaxA)).toEqual(validMinMaxA);
+        expect(validMinMaxA.extendedBy(invalidMinMax)).toEqual(validMinMaxA);
+
+        expect(validMinMaxA.extendedBy(validMinMaxB)).toEqual(new MinMax(0, 11));
+
+        expect(invalidMinMax.extendedBy(invalidMinMax).isValid()).toBe(false);
+    });
+});