diff --git a/core/api/src/main/java/org/onosproject/net/pi/runtime/PiActionSet.java b/core/api/src/main/java/org/onosproject/net/pi/runtime/PiActionSet.java
new file mode 100644
index 0000000..f2908d4
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/pi/runtime/PiActionSet.java
@@ -0,0 +1,179 @@
+/*
+ * Copyright 2020-present Open Networking Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onosproject.net.pi.runtime;
+
+import com.google.common.annotations.Beta;
+import com.google.common.base.MoreObjects;
+import com.google.common.base.Objects;
+import com.google.common.collect.Sets;
+
+import java.util.Set;
+
+/**
+ * Instance of an action set of a protocol-independent pipeline used
+ * when doing one-shot action selector programming. Contains a set of weighted
+ * actions, and it is equivalent to the action profile action set from P4Runtime
+ * specifications.
+ */
+@Beta
+public final class PiActionSet implements PiTableAction {
+
+    private final Set<WeightedAction> actionSet;
+
+    private PiActionSet(Set<WeightedAction> actionSet) {
+        this.actionSet = actionSet;
+    }
+
+    /**
+     * Returns the set of actions.
+     *
+     * @return the set of actions
+     */
+    public Set<WeightedAction> actions() {
+        return actionSet;
+    }
+
+    @Override
+    public Type type() {
+        return Type.ACTION_SET;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        PiActionSet that = (PiActionSet) o;
+        return Objects.equal(actionSet, that.actionSet);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hashCode(actionSet);
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(this)
+                .add("actionSet", actionSet)
+                .toString();
+    }
+
+    /**
+     * Returns a new builder of an action set.
+     *
+     * @return action set builder
+     */
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    /**
+     * Builder of an action set.
+     */
+    public static final class Builder {
+
+        private final Set<WeightedAction> actionSet = Sets.newHashSet();
+
+        private Builder() {
+            // hides constructor.
+        }
+
+        /**
+         * Adds a weighted action to this action set.
+         *
+         * @param action The action to add
+         * @param weight The weight associated to the action
+         * @return this
+         */
+        public Builder addWeightedAction(
+                PiAction action, int weight) {
+            actionSet.add(new WeightedAction(action, weight));
+            return this;
+        }
+
+        /**
+         * Creates a new action profile action set.
+         *
+         * @return action profile action set
+         */
+        public PiActionSet build() {
+            return new PiActionSet(Set.copyOf(actionSet));
+        }
+    }
+
+    /**
+     * Weighted action used in an actions set.
+     */
+    public static final class WeightedAction {
+        public static final int DEFAULT_WEIGHT = 1;
+
+        private final int weight;
+        private final PiAction action;
+
+        /**
+         * Creates a new weighted action instance that can be used in an action
+         * set, from the given PI action and weight.
+         *
+         * @param action the action
+         * @param weight the weigh
+         */
+        public WeightedAction(PiAction action, int weight) {
+            this.weight = weight;
+            this.action = action;
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) {
+                return true;
+            }
+            if (o == null || getClass() != o.getClass()) {
+                return false;
+            }
+            WeightedAction that = (WeightedAction) o;
+            return weight == that.weight &&
+                    Objects.equal(action, that.action);
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hashCode(weight, action);
+        }
+
+        @Override
+        public String toString() {
+            return MoreObjects.toStringHelper(this)
+                    .add("weight", weight)
+                    .add("action", action)
+                    .toString();
+        }
+
+        public int weight() {
+            return weight;
+        }
+
+        public PiAction action() {
+            return action;
+        }
+    }
+}
+
+
diff --git a/core/api/src/main/java/org/onosproject/net/pi/runtime/PiTableAction.java b/core/api/src/main/java/org/onosproject/net/pi/runtime/PiTableAction.java
index 284dde6..d803ca6 100644
--- a/core/api/src/main/java/org/onosproject/net/pi/runtime/PiTableAction.java
+++ b/core/api/src/main/java/org/onosproject/net/pi/runtime/PiTableAction.java
@@ -43,7 +43,13 @@
          * Executes the action profile member specified by the given
          * identifier.
          */
-        ACTION_PROFILE_MEMBER_ID
+        ACTION_PROFILE_MEMBER_ID,
+
+        /**
+         * Executes the given action set. Used in one-shot action profile
+         * programming.
+         */
+        ACTION_SET
     }
 
     /**
diff --git a/core/api/src/main/java/org/onosproject/net/pi/runtime/PiTableEntry.java b/core/api/src/main/java/org/onosproject/net/pi/runtime/PiTableEntry.java
index ee3c3c3..40ad4de 100644
--- a/core/api/src/main/java/org/onosproject/net/pi/runtime/PiTableEntry.java
+++ b/core/api/src/main/java/org/onosproject/net/pi/runtime/PiTableEntry.java
@@ -185,6 +185,8 @@
                 return "ACT_PROF_GROUP:" + ((PiActionProfileGroupId) tableAction).id();
             case ACTION_PROFILE_MEMBER_ID:
                 return "ACT_PROF_MEMBER:" + ((PiActionProfileMemberId) tableAction).id();
+            case ACTION_SET:
+                return "ACTION_SET:" + tableAction.toString();
             case ACTION:
             default:
                 return tableAction.toString();