OptionalcaptionCaption of the document to be sent, 0-1024 characters after entities parsing
Optionalcaption_List of special entities that appear in the caption, which can be specified instead of parse_mode
OptionaldescriptionShort description of the result
A valid URL for the file
Unique identifier for this result, 1-64 bytes
Optionalinput_Content of the message to be sent instead of the file
MIME type of the content of the file, either “application/pdf” or “application/zip”
Optionalparse_Mode for parsing entities in the document caption. See formatting options for more details.
Optionalreply_Inline keyboard attached to the message
Optionalthumbnail_Thumbnail height
Optionalthumbnail_URL of the thumbnail (JPEG only) for the file
Optionalthumbnail_Thumbnail width
Title for the result
Type of the result, must be document
Represents a link to a file. By default, this file will be sent by the user with an optional caption. Alternatively, you can use input_message_content to send a message with the specified content instead of the file. Currently, only .PDF and .ZIP files can be sent using this method.
Note: This will only work in Telegram versions released after 9 April, 2016. Older clients will ignore them.