Using Arrays in ContextData

I am working on an anlytics implementation using the Adobe Mobile SDK v4.x (iOS/Android)

We have a class that outputs a CEDDL (https://www.w3.org/2013/12/ceddl-201312.pdf) like datalayer as a context variable object, and then using processing rules, map things like digitalData.page.pageInfo.pageName to 'pageName', or digitalData.pageInfo.site to eVar3.

My question is, how can possible to assign values from arrays in the datalayer to eVars/props using processing rules?

For example:

digitalData.component[0].componentName

digitalData.component[1].componentName

digitalData.component[n].componentName