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diff --git a/Firestore/core/src/firebase/firestore/model/document.h b/Firestore/core/src/firebase/firestore/model/document.h
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+/*
+ * Copyright 2018 Google
+ *
+ * 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.
+ */
+
+#ifndef FIRESTORE_CORE_SRC_FIREBASE_FIRESTORE_MODEL_DOCUMENT_H_
+#define FIRESTORE_CORE_SRC_FIREBASE_FIRESTORE_MODEL_DOCUMENT_H_
+
+#include "Firestore/core/src/firebase/firestore/model/field_value.h"
+#include "Firestore/core/src/firebase/firestore/model/maybe_document.h"
+
+namespace firebase {
+namespace firestore {
+namespace model {
+
+/**
+ * Represents a document in Firestore with a key, version, data and whether the
+ * data has local mutations applied to it.
+ */
+class Document : public MaybeDocument {
+ public:
+  /**
+   * Construct a document. FieldValue must be passed by rvalue.
+   */
+  Document(FieldValue&& data,
+           DocumentKey key,
+           SnapshotVersion version,
+           bool has_local_mutations);
+
+  const FieldValue& data() const {
+    return data_;
+  }
+
+  bool has_local_mutations() const {
+    return has_local_mutations_;
+  }
+
+ protected:
+  bool Equals(const MaybeDocument& other) const override;
+
+ private:
+  FieldValue data_;  // This is of type Object.
+  bool has_local_mutations_;
+};
+
+/** Compares against another Document. */
+inline bool operator==(const Document& lhs, const Document& rhs) {
+  return lhs.version() == rhs.version() && lhs.key() == rhs.key() &&
+         lhs.has_local_mutations() == rhs.has_local_mutations() &&
+         lhs.data() == rhs.data();
+}
+
+inline bool operator!=(const Document& lhs, const Document& rhs) {
+  return !(lhs == rhs);
+}
+
+}  // namespace model
+}  // namespace firestore
+}  // namespace firebase
+
+#endif  // FIRESTORE_CORE_SRC_FIREBASE_FIRESTORE_MODEL_DOCUMENT_H_