Talk:Modding Tutorials/Smelter/Questions not addressed in this tutorial

First of all, I apologize if there are any errors or mistakes in this tutorial. I wrote it because it would have been immensely helpful to me if it had existed when I started out. My knowledge is far from complete and there are still a few areas unaddressed in this tutorial that should be (either here or in an advanced concepts page):

• What do Ingredients, Filter, ParentIngredientFilter, and DefaultIngredientFilter do specifically? Are they each mandatory?
• How does the value of PriorityInType work in the WorkGiverDef? Is a higher value more important or a lower value?

If there is anything in the tutorial not actually necessary to the bare-bones implementation of the concept (turn slag into metal), I would like to elide it from the .xml files. This is just because I don't like boilerplate and want to avoid cargo-cult coding.