close stream-name indexer?
close action explicitly closes a
stream shelf item. Once a stream that is attached to a
referent, markup parser, or external string sink function has been closed, the same stream name can be used to open another attachment.
Streams do not normally need to be closed because:
openis performed on the stream shelf item.
Several streams can be closed at once.
It is an error to close a stream that is part of any
#current-output for any currently open rule or function.