Purpose

A built-in stream shelf that provides specific information about the input data being parsed in the case of an error. The information provided to #additional-info comes from the markup parser error message. #additional-info can only be accessed from the header and body of sgml-error or markup-error rules.

The information provided is the text of the error message that gives information about this particular error. #recovery-info provides information on how the markup parser will recover from the error and continue processing.

#additional-info is not always attached. Use the is attached test to ensure the stream is attached before attempting to use its value (the information about the input data).

Related Syntax    #class    #error-code    #file-name    #line-number    #message    #recovery-info    is attached    markup-error

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