diff --git a/sbg/dto/Makefile.include b/sbg/dto/Makefile.include
index f4630be..70a76db 100644
--- a/sbg/dto/Makefile.include
+++ b/sbg/dto/Makefile.include
@@ -2,8 +2,10 @@
 DTO_SRC := \
     $(DTO_ROOT)/interval_dto.cpp \
     $(DTO_ROOT)/multidim_inter_dto.cpp \
+    $(DTO_ROOT)/pw_mdinter_dto.cpp \
     $(CONVERTERS_ROOT)/interval_dto_converter.cpp \
-    $(CONVERTERS_ROOT)/multidim_inter_dto_converter.cpp
+    $(CONVERTERS_ROOT)/multidim_inter_dto_converter.cpp \
+    $(CONVERTERS_ROOT)/pw_mdinter_dto_converter.cpp
 
 # DTO Objects
 DTO_OBJ=$(addprefix $(BUILD_DIR)/, $(DTO_SRC:.cpp=.o))
\ No newline at end of file
diff --git a/sbg/dto/converters/pw_mdinter_dto_converter.cpp b/sbg/dto/converters/pw_mdinter_dto_converter.cpp
new file mode 100644
index 0000000..16f6c18
--- /dev/null
+++ b/sbg/dto/converters/pw_mdinter_dto_converter.cpp
@@ -0,0 +1,46 @@
+/*******************************************************************************
+
+ This file is part of Set--Based Graph Library.
+
+ SBG Library is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ SBG Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with SBG Library.  If not, see <http://www.gnu.org/licenses/>.
+
+ ******************************************************************************/
+
+#include "sbg/dto/converters/multidim_inter_dto_converter.hpp"
+#include "sbg/dto/converters/pw_mdinter_dto_converter.hpp"
+
+namespace SBG {
+
+namespace API {
+SBG::LIB::OrdSet PWMDInterDTOConverter::convertToOrdSet(const SetDTO& dto) {
+  SBG::LIB::OrdSet ord_set;
+  for (const SetPieceDTO& set_piece_dto : dto.pieces_) {
+    ord_set.emplace(SetPieceDTOConverter::convertToSetPiece(set_piece_dto));
+  }
+
+  return ord_set;
+}
+
+SBG::LIB::UnordSet PWMDInterDTOConverter::convertToUnordSet(const PWMDInterDTO& dto) {
+  SBG::LIB::UnordSet unord_set;
+  for (const SetPieceDTO& set_piece_dto : dto.pieces_) {
+    unord_set.emplace(SetPieceDTOConverter::convertToSetPiece(set_piece_dto));
+  }
+
+  return unord_set;
+}
+
+} // namespace API
+
+} // namespace SBG
\ No newline at end of file
diff --git a/sbg/dto/converters/pw_mdinter_dto_converter.hpp b/sbg/dto/converters/pw_mdinter_dto_converter.hpp
new file mode 100644
index 0000000..efcead3
--- /dev/null
+++ b/sbg/dto/converters/pw_mdinter_dto_converter.hpp
@@ -0,0 +1,59 @@
+/** @file pw_mdinter_dto_converter.hpp
+
+ @brief <b> PWMDInterDTOConverter implementation</b>
+
+ The PWMDInterDTOConverter is used to convert a PWMDInterDTO (SetDTO)
+ to the corresponding piecewise multi-dimensional interval representation.
+ Currently, it can convert to SBG::LIB::OrdSet and SBG::LIB::UnordSet,
+ but more conversions can be added in the future.
+
+ <hr>
+
+ This file is part of Set--Based Graph Library.
+
+ SBG Library is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ SBG Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with SBG Library.  If not, see <http://www.gnu.org/licenses/>.
+
+ ******************************************************************************/
+
+#ifndef SBG_DTO_PW_MDINTERVAL_CONVERTER_HPP
+#define SBG_DTO_PW_MDINTERVAL_CONVERTER_HPP
+
+#include "sbg/dto/pw_mdinter_dto.hpp"
+#include "sbg/ord_pw_mdinter.hpp"
+#include "sbg/unord_pw_mdinter.hpp"
+
+namespace SBG {
+
+namespace API {
+
+class PWMDInterDTOConverter {
+public:
+  /**
+   * @brief Converts a SetDTO object to an actual piecewise multi-dimensional 
+   * interval implementation (e.g., SBG::LIB::OrdSet / SBG::LIB::UnordSet).
+   * 
+   * @param dto: The SetDTO object to convert.
+   * @return SBG::LIB::OrdSet/UnordSet: The converted interval object.
+   */
+  static SBG::LIB::OrdSet convertToOrdSet(const SetDTO& dto);
+  static SBG::LIB::UnordSet convertToUnordSet(const SetDTO& dto);
+};
+
+typedef PWMDInterDTOConverter SetDTOConverter;
+
+} // namespace API
+
+} // namespace SBG
+
+#endif // SBG_DTO_PW_MDINTERVAL_CONVERTER_HPP
diff --git a/sbg/dto/pw_mdinter_dto.cpp b/sbg/dto/pw_mdinter_dto.cpp
new file mode 100644
index 0000000..a7a47b3
--- /dev/null
+++ b/sbg/dto/pw_mdinter_dto.cpp
@@ -0,0 +1,96 @@
+/*******************************************************************************
+
+ This file is part of Set--Based Graph Library.
+
+ SBG Library is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ SBG Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with SBG Library.  If not, see <http://www.gnu.org/licenses/>.
+
+ ******************************************************************************/
+
+#include "sbg/dto/pw_mdinter_dto.hpp"
+
+namespace SBG {
+
+namespace API {
+
+// Type definitions ------------------------------------------------------------
+
+std::ostream &operator<<(std::ostream &out, const SetPieceDTOVector &ii) 
+{
+  std::size_t sz = ii.size();
+
+  out << "{";
+  if (sz > 0) {
+    unsigned int j = 0;
+    for (const SetPieceDTO &mdi : ii) { 
+      if (j < sz - 1)
+        out << mdi << ", "; 
+      else
+        out << mdi;
+
+      ++j;
+    }
+  }
+  out << "}";
+
+  return out;
+}
+
+// PWMDInterDTO ------------------------------------------------------------------
+
+PWMDInterDTO::PWMDInterDTO() : pieces_() {}
+PWMDInterDTO::PWMDInterDTO(MD_NAT x) : pieces_() {
+  pieces_.push_back(SetPieceDTO(x));
+}
+PWMDInterDTO::PWMDInterDTO(IntervalDTO i) : pieces_() {
+  if (!i.isEmpty())
+    pieces_.push_back(SetPieceDTO(i));
+}
+PWMDInterDTO::PWMDInterDTO(SetPieceDTO mdi) : pieces_() { 
+  if (!mdi.isEmpty())
+    pieces_.push_back(mdi);
+}
+PWMDInterDTO::PWMDInterDTO(SetPieceDTOVector container) : pieces_() {
+  for (const SetPieceDTO &mdi : container) {
+    if (!mdi.isEmpty())
+      pieces_.push_back(mdi);
+  }
+}
+
+member_imp(PWMDInterDTO, SetPieceDTOVector, pieces);
+
+std::size_t PWMDInterDTO::size() const { return pieces_.size(); }
+
+void PWMDInterDTO::emplace(SetPieceDTO mdi)
+{
+  if (!mdi.isEmpty())
+    pieces_.push_back(mdi);
+}
+void PWMDInterDTO::emplaceBack(SetPieceDTO mdi)
+{
+  if (!mdi.isEmpty())
+    pieces_.push_back(mdi);
+}
+
+bool PWMDInterDTO::isEmpty() const { return pieces_.empty(); }
+
+std::ostream &operator<<(std::ostream &out, const PWMDInterDTO &pwi)
+{
+  out << pwi.pieces_; //TODO: check if this translates ok (it should use the operator<< for SetPieceDTOVector at the top of this file).
+
+  return out;
+}
+
+} // namespace API
+
+} // namespace SBG
diff --git a/sbg/dto/pw_mdinter_dto.hpp b/sbg/dto/pw_mdinter_dto.hpp
new file mode 100644
index 0000000..61e5c9b
--- /dev/null
+++ b/sbg/dto/pw_mdinter_dto.hpp
@@ -0,0 +1,74 @@
+/** @file pw_mdinter_dto.hpp
+
+ @brief <b>Piecewise multi-dimensional interval dto implementation</b>
+
+ The PWMDInterDTO class is a Data Transfer Object (DTO) for handling 
+ raw data, such as from JSON. It is designed for conversion into
+ concrete implementations like OrdSet/UnordSet via a dedicated converter.
+
+ <hr>
+
+ This file is part of Set--Based Graph Library.
+
+ SBG Library is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ SBG Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with SBG Library.  If not, see <http://www.gnu.org/licenses/>.
+
+ ******************************************************************************/
+
+#ifndef SBG_DTO_PW_MDINTERVAL_HPP
+#define SBG_DTO_PW_MDINTERVAL_HPP
+
+#include <vector>
+
+#include "sbg/dto/multidim_inter_dto.hpp"
+
+namespace SBG {
+
+namespace API {
+
+// Container -------------------------------------------------------------------
+
+typedef std::vector<SetPieceDTO> SetPieceDTOVector;
+std::ostream &operator<<(std::ostream &out, const SetPieceDTOVector &ii);
+
+struct PWMDInterDTO {
+  member_class(SetPieceDTOVector, pieces);
+
+  /**
+   * @brief Constructors don't check if intervals are disjoint (performance).
+   */
+  PWMDInterDTO();
+  PWMDInterDTO(Util::MD_NAT x);
+  PWMDInterDTO(IntervalDTO i);
+  PWMDInterDTO(SetPieceDTO mdi);
+  PWMDInterDTO(SetPieceDTOVector container);
+
+  std::size_t size() const;
+  void emplace(SetPieceDTO mdi);
+  void emplaceBack(SetPieceDTO mdi);
+
+  /**
+   * @brief Traditional set operations.
+   */
+  bool isEmpty() const;
+
+  friend std::ostream &operator<<(std::ostream &out, const PWMDInterDTO &i);
+};
+
+typedef PWMDInterDTO SetDTO;
+
+} // namespace API
+
+}  // namespace SBG
+
+#endif