Demonstrate round trip of DIALS data to Nexus data with no loss of signal

[Anthchirp]

(issue carried over from discussion in DIALS core meeting)

Nexus as working format for DIALS?

DIALS has an existing data model (past: pickle, now: msgpack). Internal names in that model correspond to the names used inside DIALS for development, eg. xyzobs.px.value has a clear definition.

• internal names can be kept using soft/hardlinks

No objections for a dials.export $file.refl format=nexus, but do not use nexus as a format to interchange data within DIALS programs.

Q: What is the underlying benefit of using Nexus?

• main benefit is putative interoperability

Actions:

ASB to create a transformation tool DIALS → Nexus → DIALS to demonstrate the feasibility of this approach, so that we have a concrete proposal to discuss.

[phyy-nx]

👍

[stale]

This issue has been automatically marked as stale because it has not had recent activity. The label will be removed automatically if any activity occurs. Thank you for your contributions.

[graeme-winter]

Nice idea, this is never going to happen - we may also redefine NeXus one day anyway

[jbeilstenedmands]

Closing to reduce issue load, please reopen if desired.