All the pseudo-code examples in section A.1 Examples , which are supposed to demonstrate the data model at a serialization-independent level, use IDs to indicate what relations point to. This is problematic because the data model doesn t actually allow any ID properties at the model-level. Perhaps it might be better to replace the pseudocode in this section with diagrams like in my unofficial introduction :
https://www.lexiconista.com/dmlex/ Downside: It s a lot of work to draw these diagrams. They cannot be generated automatically. Upside: The diagrams really do make it clearer to human readers how the model ticks at model-level. People who have read the unofficial introduction have responded very well to them. M.