For a DTD to validate either binary data, such as images or video clips, or character data that is not well formed, you need to work with parsed entities.

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A DTD (Document Type Definition) is used to define the structure and legal elements and attributes of an XML document, but it does not handle binary data or non-well-formed character data. For binary data, other methods like Base64 encoding or using external entities are needed.

For a DTD to Validate Either Binary Data, Such as Images