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+#ifndef DATABASE_H_0B0A47D2
+#define DATABASE_H_0B0A47D2
+
+#include <string>
+#include <exception>
+#include <list>
+#include "notion.h"
+#include "word.h"
+#include "group.h"
+#include "frame.h"
+#include "lemma.h"
+#include "form.h"
+#include "pronunciation.h"
+
+struct sqlite3;
+
+namespace verbly {
+  
+  template <typename Object>
+  class query;
+
+  class database {
+  public:
+
+    // Constructor
+
+    explicit database(std::string path);
+
+    // Disable copying
+
+    database(const database& other) = delete;
+    database& operator=(const database& other) = delete;
+
+    // Move constructor and move assignment
+
+    database(database&& other);
+    database& operator=(database&& other);
+
+    // Swap
+
+    friend void swap(database& first, database& second);
+
+    // Destructor
+
+    ~database();
+    
+    // Queries
+    
+    query<notion> notions(filter where, bool random = true, int limit = 1) const;
+    
+    query<word> words(filter where, bool random = true, int limit = 1) const;
+    
+    query<group> groups(filter where, bool random = true, int limit = 1) const;
+    
+    query<frame> frames(filter where, bool random = true, int limit = 1) const;
+    
+    query<lemma> lemmas(filter where, bool random = true, int limit = 1) const;
+    
+    query<form> forms(filter where, bool random = true, int limit = 1) const;
+    
+    query<pronunciation> pronunciations(filter where, bool random = true, int limit = 1) const;
+
+  private:
+
+    database() = default;
+
+    sqlite3* ppdb_ = nullptr;
+
+  };
+
+};
+
+#endif /* end of include guard: DATABASE_H_0B0A47D2 */