You have a couple options. Yes, you could create an analysis for each property in your local file
example DNS1 property:
following text of first "=" of lines whose (it starts with "DNS1") of file <full path to file>
But also those values you have could just be created as analysis properties to pull the values via BigFix Client inspectors and not deal with local files.
Example: BIOS How to find the BIOS Version