How to get a subgraph consisting of all vertices, that satisfy specific condition
The Document and the Revision are two objects that reside in our domain logic specific layer. The Document represents an abstraction around any material piece of paper that you could think of. That is - every contract, invoice or drawing could be called a Document . On the other hand, the material representation of the Document is the Revision : the list of paper, that construction engineer receives on site, represents a Revision of the Document that designer has created. If something in a drawing has to be changed, due to an error or changed requirements, then a new revision will show up on