题目
Consider the use of XML to represent information about the results of a particular tennis tournament. The application is described as follows. A tournament is a sequence of matches. Each match is between two players. For each player, the result of the match is either “won” or “lost”. For each player, the number of games they won in each of between 2 and 5 sets (inclusive), is recorded. Write down a suitable Document Type Definition (DTD) for this application.
