Datablocks are one of the highlights of the upcoming version 5. This is a first patch which intends to extend their usefulness even further by using them as in-memory-data. This can help to avoid temporary files.
This patch implements
set print $datablock [append], i.e.
I intend to apply this idea to implement
set table $datablock and fit parameter files. save/load commands for datablocks will complete this functionality.
These commands could also help to implement the idea of [patches:#427].