What are the Job attribute fields/columns in the worksheet intended for?

Summary

Need to understand what the Job attribute fields/columns in the worksheet can be used for and their intent

Content

I need to understand what the Job attribute fields/columns in the worksheet are for. Are they just related to the job? They show up as columns under the "Employment" section. Are they connected to anything, especially if you transfer the data to HR? I can't find any specific documentation. We need some more columns and are wondering if we can use these for some data that would not be transferred but just used for information so we can free up some of the custom text/numeric columns for fields that are needed for cross plan reference or calculations.