Hi, I am not sure I understand your question. Hismo builds histories and versions out of existing snapshots. This means that in your case, you will get: - 3+4+6 nodes and 2+3+5 edges snapshots and versions, and - 6 node histories and 5 edge histories. If you are asking about whether version 3 of the system duplicates A1,B1,C1,C2, the answer is yes. If you want to only work with deltas, then you probably should look at Orion. Cheers, Doru On Wed, Nov 13, 2013 at 2:17 PM, Yuriy Tymchuk &lt;yuriy.tymchuk(a)me.com&gt; wrote: Hi everyone. For me it’s still not clear how does HISMO version versions :). To help myself explain my question I’ve attached the image. <HISMO question.png> What happens if a new nodes are added to each version. Do all 3 snapshots share same nodes, or they are duplicated? Because when I look at MooseSampleData>>initialization it seams to me that 5 different models are created and references to them are stored to them from history. Cheers. Uko _______________________________________________ Moose-dev mailing list Moose-dev(a)iam.unibe.ch https://www.iam.unibe.ch/mailman/listinfo/moose-dev -- www.tudorgirba.com "Every thing has its own flow" _______________________________________________ Moose-dev mailing list Moose-dev(a)iam.unibe.ch https://www.iam.unibe.ch/mailman/listinfo/moose-dev