Server docs for graphs (delete/chgrp)

[jamoore]

Mid-level developer docs are missing for the graph, chgrp, delete, etc packages. While working on this subsystem, the following could be added:

• Sphinx page describing the graph loading of the server
• Graffle of the types of data involved
• explanation of what delete mean. When does an image disapper? When does it fall under "orphan"?

[jamoore]

Discussed with Mark. This will be re-addressed during the work on #10890

[jburel]

Mark: can we close this ticket now?

[mtbcarroll]

Certainly there are *some* docs for the new implementation, like http://www.openmicroscopy.org/site/support/omero5.1/developers/Server/ObjectGraphs.html, and I do plan to add some rules comments in my work on ​https://trello.com/c/Ryvi7Cra/194-review-graph-traversal-rules that may bear on questions like when something is orphaned. Josh, what are your thoughts on what's still missing, if anything?

[mtbcarroll]

Bah, I didn't change the milestone.

[jamoore]

This was written priori to your/Mark's rewrite. I'd assume the existing cards probably cover anything I was thinking of. A graffle/visual would be nice, but that probably goes for all of our developer docs, and they're expensive to maintain. Ok if you want to close.

[mtbcarroll]

+1