Inconsistency between generation of ipl and yaml files

[daniel-sol]

When using lowercase names for variables or lists nothing is generated for those in the ipl files, but they are carried through in the yaml version. The issue has two parts:

1. I see the rationale for not having such a strict standard for the yaml version, since one will clearly see in the code that these are coming from a dictionary. But it is nevertheless a different behavior for generation of two files that should contain identical output.

2. The fact that that the variables are not carried through for ipl suggests that the standard should be to use uppercase names, which is indeed the intention, but then there should at the very least be a warning that standard is not addhered to