使用DTD的目的是（）。A、确保XML文档是格式良好的（“Well-Formed”）B、确保XML文档是有效的（“Valid”）C、确保两个XML文档是一致的D、确保元素类型正确（例如，是integer型而不是string型）
使用DTD的目的是（）。
- A、确保XML文档是格式良好的（“Well-Formed”）
- B、确保XML文档是有效的（“Valid”）
- C、确保两个XML文档是一致的
- D、确保元素类型正确（例如，是integer型而不是string型）
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