FWIW, Innolitics has a better data dictionary (information object definitions) for DICOM than the official standards website. https://dicom.innolitics.com/ciods
DICOM has its issues, but it’s much better than HL7.
@korijn I'm glad you find our DICOM Standard Browser to be useful!
You (and others reading this post) may be interested to know that the JSON data the powers the browser is extracted using a set of open-sourced Python scripts:
Thanks for linking the site! If you have any suggestions or encountered any bugs on the site, please feel free to create an issue in the repo: https://github.com/innolitics/dicom-standard/issues