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A.10.2 Text File Management

Static Semantics

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The only allowed file modes for text files are the modes In_File, Out_File, and Append_File. The subprograms given in subclause A.8.2 for the control of external files, and the function End_Of_File given in subclause A.8.3 for sequential input-output, are also available for text files. There is also a version of End_Of_File that refers to the current default input file. For text files, the procedures have the following additional effects: 
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The exception Mode_Error is propagated by the procedure Reset upon an attempt to change the mode of a file that is the current default input file, the current default output file, or the current default error file. 
NOTES
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22  An implementation can define the Form parameter of Create and Open to control effects including the following: 
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