Hi,
As usual, sorry, but i didn't find any answer, so here is my problem:

I have successfully made a rig for my character and make it into a digital Asset.

This character will have a staff, and i'd like to make the staff contraining the ik controler of a hand. (Because i'd like to have the staff rotating around a pivot where it touches the floor).
It seems easy the opposite way (the hand contraining the staff) but as my DA is locked, i have to “enable editing of contents” on it to make the parenting works. And even so, it breaks the original parenting i have inside my rig.

I though about including the staff in my DA, but it will only work for a specific case. I mean, what if i want to unparent the hand and parent the other one? Or if i need later to parent the staff to the hand, the opposite way?

I know i may be confuse, and even worst my english writing!
But if anyone have an idea…

I shouldn't say that, but i was looking to maya constraints style parenting, where you can animate and stack a lot of constraints…

Isn't this a case of creating for those objects inside your digital asset various “handles” in your DA to interact with the exterior?

I recall a tutorial with a simple pill that showcases the approach to create visual handles.

Sorry I can't be more specific but I am not in front of the workstation

if you drop down a simplefemale from the Character Shelf you'll see that she has a parameter called ‘L Custom Space’ (Arms>Left Arm)
if you reference an object in the parameter and then set the blend to 1 - this object will now be the parent of the L Arm IK control - so animating it will animate the IK.
if you unlock the asset you'll be able to see how this is set up - a fetch node and a blend basically, with some parameters promoted.

HTH

Thanks a lot, will see this right now!

That worked quite well, thanks Arctor!
Even if i'm not able to keep the current position of the hand as it worked in maya when creating a new constraint, it will do the trick for now.

it's not the best solution - one of the current tricky bits of HDAs and something we're working to improve.
you should also have a look at the Dynamic Parent tool - in the Viewport > TAB > Dynamic Parent

I will as soon as i can, thanks Arctor.
I was thinking (don't know how hard it could be) that an option like the “keep position when parenting” could be nice, like “keep position when blending” :p
I'm not a technical guy at all, but i guess it's a trick with inverse xForm matrices, right?