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+/*    This file is part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT.
+ *    See file LICENSE or go to https://gudhi.inria.fr/licensing/ for full license details.
+ *    Author(s):       Vincent Rouvreau
+ *
+ *    Copyright (C) 2018 Inria
+ *
+ *    Modification(s):
+ *      - YYYY/MM Author: Description of the modification
+ */
+
+#ifndef CONCEPT_ALPHA_COMPLEX_SIMPLICIAL_COMPLEX_FOR_ALPHA_3D_H_
+#define CONCEPT_ALPHA_COMPLEX_SIMPLICIAL_COMPLEX_FOR_ALPHA_3D_H_
+
+namespace Gudhi {
+
+namespace alpha_complex {
+
+/** \brief The concept SimplicialComplexForAlpha3d describes the requirements for a type to implement a simplicial
+ * complex, that can be created from a `Alpha_complex_3d`.
+ */
+struct SimplicialComplexForAlpha3d {
+  /** Handle to specify a vertex. Must be a non-negative integer. */
+  typedef unspecified Vertex_handle;
+  /** Handle to specify the simplex filtration value. */
+  typedef unspecified Filtration_value;
+
+  /** Returns the number of vertices in the simplicial complex. */
+  std::size_t num_vertices();
+
+  /** \brief Inserts a simplex from a given simplex (represented by a vector of Vertex_handle) in the
+   * simplicial complex with the given 'filtration' value. */
+  void insert_simplex(std::vector<Vertex_handle> const& vertex_range, Filtration_value filtration);
+
+  /** Browses the simplicial complex to make the filtration non-decreasing. */
+  void make_filtration_non_decreasing();
+
+  /** Prune the simplicial complex above 'filtration' value given as parameter. */
+  void prune_above_filtration(Filtration_value filtration);
+};
+
+}  // namespace alpha_complex
+
+}  // namespace Gudhi
+
+#endif  // CONCEPT_ALPHA_COMPLEX_SIMPLICIAL_COMPLEX_FOR_ALPHA_3D_H_