What are these underscore fields that ghidra generates sometimes for integers?

[Mai-Lapyst]

Hi, i've have been using ghidra for some time now and encountered some strange fields in the decompiler that seems not to be documented:

I've managed to find out that the first number seems to be the offset and the second the length. I also know (thanks to the documentation of the CONCAT function) that it's byte based.

But where I struggle is, how is this counted? Which endianess must I use?
Is for example 0xAABBCCDD._0_2_ the value 0xCCDD or 0xAABB?