text: 
  -- Create the base tables and triggers for a flat nodes storage
  --
  --
  -- ----------------------------------------------------------------------------
  
  -- the table for the datas
  CREATE TABLE IF NOT EXISTS "Nodes"(
      "id" INTEGER NOT NULL,
      "label" TEXT NOT NULL, -- eg. store dirpath/filepath for a filesystem tree
      "type" TEXT NOT NULL, -- eg. f for file d for dir for a filesystem tree
      "datas" BLOB DEFAULT NULL, -- eg. file binary datas for a filesystem tree
      PRIMARY KEY ("id")
  );
  