Calculated measures (and other calculated members) are evaluated at runtime whether they are defined in the cube definition or elsewhere. (Measures other than calculated measures are evaluated at build time and their values are stored in the fact table, but I don't think that would be suitable for what Nick wanted to do here.)

Thanks, Brett! That seems to work, and is much more concise than what I had come up with.

- provide 2023.1.x tag which will follow the latest minor version

It's not clear to me whether or not this is already the plan for the new Major.Minor tags. For instance, when IRIS 2024.1.1 is released, will it be at containers.intersystems.com/intersystems/iris:2024.1 (where IRIS 2024.1.0 images would likely have existed previously) or containers.intersystems.com/intersystems/iris:2024.1.1? @Bob Kuszewski can you please clarify?