This is what the REPOsitory record is for.
Fact contains the information
Citation contains the where found in source
Source contains complete information about the source
SourceRepository contains location of source in Repository
Repository contains the location of the source
For example: A birth certificate.
Fact = Birth of person, name of parents, location of birth
Citation = detail description of information
Source = general information about certificate
SourceRepository = Index, file drawer in your home library
Repository = Your home library.
Similar this can be done for books you own, documents, recordings of interviews. Not a perfect system but this is what the general use of the tags/fields are used for.