I merged all the changes from TC #18 into the Provisional Draft, as amended, along with three editorial changes (see the in-progress Editor’s Report for 2018-05-30 ). There are several issues open for discussion: Nested graphs: Michael and Luke , please see my analysis of your three similar-but-not-quite-the-same proposals for “nested graphs”, and respond with your choice. Region properties : We had a spirited discussion on this; how shall we close? We talked about somebody surveying tools, but the raw chat trace doesn’t show an action item for anyone, and Jim’s going on vacation in a couple of days. Hierarchical identifiers : I sent email asking if a hierarchical string can have empty components, or even be completely empty. VCS roles : I sent email asking if we should replace generatedFile with uncontrolledFile; Jim responded; I’m pondering, please weigh in with your opinion. Quasi-editorial change : Please take a look at the mail I sent on this topic and let me know if you object to the normative requirement I added. David , should we put this on the agenda to ratify at TC #19? Am I off by one on the meeting numbers? Thanks, Larry