What should the ideal data export feature look like?

• Export all your data (yes, all of it), at any time
  • Your content
  • All metadata related to that content
  • Your account info / settings / site preferences / etc.
  • Any logs of your activity that are accessible to you
  • Other?
• Multiple formats available; all of these that are appropriate:
  • JSON
  • XML
  • CSV
• Conveniently packaged/distributed
  • Available as a .zip / .tar.gz / whatever
• Convenient to acquire
  • Just click a button in your profile/account view
  • Also available via API endpoint
• When exporting data, any choices automatically made during export, or quirks of the export process, ought to be specified as additional metadata
  • Example: if exporting comments, they will be (should be!) provided in both Markdown and HTML format; supposing that Markdown is available for some, but had to be synthesized from the HTML for others, this fact should be noted in an additional metadata field