How to access one field of an upper node in a Data Schema?

[CampaignerForLife]

Lets say I've a Delivery schema with the next nodes 

Delivery/operation/@end

Delivery/maxDate/@maxDate

How could I assign the @End value to the @maxDate field? 

expr="[operation/@end]" is not working, as it's not detecting the node. But this one would work if @maxDate where in Delivery/@maxDate

Any answer?

Thank you in advance!!!!

@Manoj_Kumar_ @ParthaSarathy @Parvesh_Parmar @DavidKangni 

[CampaignerForLife]

Any idea on this?
@Manoj_Kumar_ @ParthaSarathy @Parvesh_Parmar @DavidKangni 

[Milan_Vucetic · Accepted solution]

Hi @CampaignerForLife 

try this:

 [..operation/@end]

Regards,

Milan

[Sukrity_Wadhwa]

Hi @CampaignerForLife,

Was the given solution by @Milan_Vucetic helpful to resolve your query or do you still need more help here? Do let us know.

Thanks!