Text from @comment directives.
Successfully parsed entries, in source order; entries that could not be parsed are omitted.
Diagnostics collected while parsing. Recoverable errors do not necessarily prevent entries from being returned.
JabRef metadata extracted from the library, including groups and file settings.
Values from @preamble directives, in source order.
Resolved values declared by @string directives.
The parsed contents of a BibTeX library.