Right now we serialize `activity.configuration_id` to `ANAMODE`, which in the IVOA note was supposed to be the reconstruction analysis configuration name. I don't really like the name, and also it doesn't work for other types configuration that are not analysis. I suggest using either `CONFIG` or `ACTCONF` (the latter because the other activity-related keywords are `ACTID`, `ACTSTART`, `ACTSTOP`, etc) This should be done before the release of the document, otherwise it requires a CCR.