ann_id	IN:	Annotation identifier returned by ANcreate, ANcreatef or ANselect
	ann_buf	OUT:	Buffer for the annotation
	ann_length	IN:	Length of the buffer ann_buf

	Purpose	Reads an annotation.
	Return value	Returns SUCCEED (or 0) if successful and FAIL (or -1) otherwise.
	Description	ANreadann reads the annotation identified by the parameter ann_id and stores the annotation in the parameter ann_buf.
		The parameter ann_length specifies the size of the buffer ann_buf. If the length of the file or data label to be read is greater than or equal to ann_length, the label will be truncated to ann_length - 1 characters. If the length of the file or data description is greater than ann_length, the description will be truncated to ann_length characters. The HDF library adds a NULL character to the retrieved label but not to the retrieved description. The user must add a NULL character to the retrieved description if the C library string functions are to operate on this description.

	FORTRAN	integer function afreadann(ann_id, ann_buf, ann_length)
		integer ann_id, ann_length
		character*(*) ann_buf