class type out_record_channel =object..end
out_record_channel can be used to output files with record
structure. This is purely abstract, as Unix does not support such
files natively, so this kind of channel is usually mapped to a flat
representation when stored in a real file, e.g. record boundaries
become newline characters.method output_eor : unit -> unit
The record model is as follows: At the beginning of the channel,
or after output_eor, a new record can be potentially started.
However, the record counts only as existing when either at least
one byte is output, or the record is explicitly ended with a
output_eor call.
This rule allows it to represent channels containing no records. There is an ambiguity at the end of the channel, however: It is possible that there are characters between the last EOR and the EOF. This could also be represented by printing another EOR just before EOF. The preferred representation is the latter.
This model correlates to the usual rules for line-structured
files, so think EOR = EOL.
