formatting.biblatex

@article{item1,
    Title = {The Title:
     \textit{italics},
     \textbf{bold},
     \textsubscript{subscript},
     \textsuperscript{superscript},
     \textsc{small-caps}}
}
---
references:
- id: item1
  type: article-journal
  title: 'The title: *Italics*, **bold**, ~subscript~, ^superscript^, <span style="font-variant:small-caps;">small-caps</span>'
  title-short: The title
...