{
  "source": "Library Management System Specification",
  "diagrams": [
    {
      "diagram_type": "UseCase",
      "components": {
        "actors": [
          "User",
          "Librarian",
          "Member"
        ],
        "use_cases": [
          "Add Book",
          "Remove Book",
          "Register Member",
          "Search Book",
          "Borrow Book",
          "Return Book"
        ],
        "relationships": [
          { "type": "association", "from": "Librarian", "to": "Add Book" },
          { "type": "association", "from": "Librarian", "to": "Remove Book" },
          { "type": "association", "from": "Librarian", "to": "Register Member" },
          { "type": "association", "from": "Member", "to": "Search Book" },
          { "type": "association", "from": "Member", "to": "Borrow Book" },
          { "type": "association", "from": "Member", "to": "Return Book" },
          { "type": "generalization", "from": "Member", "to": "User" },
          { "type": "generalization", "from": "Librarian", "to": "User" },
          { "type": "include", "from": "Borrow Book", "to": "Search Book" },
          { "type": "extend", "from": "Return Book", "to": "Borrow Book" }
        ]
      }
    },
    {
      "diagram_type": "Class",
      "components": {
        "classes": [
          {
            "name": "Book",
            "attributes": ["bookID", "title", "author", "availability"],
            "methods": ["addBook()", "removeBook()", "updateAvailability()"]
          },
          {
            "name": "Member",
            "attributes": ["memberID", "name", "contactDetails"],
            "methods": ["registerMember()", "searchBook()", "borrowBook()", "returnBook()"]
          },
          {
            "name": "Librarian",
            "attributes": ["employeeID", "name", "contactDetails"],
            "methods": ["addBook()", "removeBook()", "registerMember()"]
          },
          {
            "name": "Transaction",
            "attributes": ["transactionID", "bookID", "memberID", "borrowDate", "returnDate"],
            "methods": ["recordTransaction()", "trackBorrowingHistory()"]
          }
        ],
        "relationships": [
          { "type": "association", "from": "Librarian", "to": "Book" },
          { "type": "association", "from": "Librarian", "to": "Member" },
          { "type": "association", "from": "Member", "to": "Book" },
          { "type": "association", "from": "Transaction", "to": "Book" },
          { "type": "association", "from": "Transaction", "to": "Member" }
        ]
      }
    },
    {
      "diagram_type": "Sequence",
      "components": {
        "actors": [
          "Member",
          "Librarian"
        ],
        "objects": [
          "LibrarySystem",
          "BookCatalog",
          "Transaction"
        ],
        "messages": [
          { "from": "Member", "to": "LibrarySystem", "message": "searchBook()" },
          { "from": "LibrarySystem", "to": "BookCatalog", "message": "findBook()" },
          { "from": "BookCatalog", "to": "LibrarySystem", "message": "returnBookList()" },
          { "from": "Member", "to": "LibrarySystem", "message": "borrowBook()" },
          { "from": "LibrarySystem", "to": "Transaction", "message": "recordTransaction()" },
          { "from": "LibrarySystem", "to": "BookCatalog", "message": "updateAvailability()" },
          { "from": "Member", "to": "LibrarySystem", "message": "returnBook()" },
          { "from": "LibrarySystem", "to": "Transaction", "message": "updateTransaction()" },
          { "from": "LibrarySystem", "to": "BookCatalog", "message": "updateAvailability()" }
        ]
      }
    }
  ]
}