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|.txt|| Before: plain text file|
After: the text output of xml2rfc (UTF-8-encoded file with a byte order mark)
| Before: (rare cases) a scan of a handcopy RFC or a PDF with images added by authors (see  for details).|
After: the PDF output of xml2rfc converted to PDF/A-3 using pdfaPilot .
|.html|| Before: HTML created from TXT using rfc2html |
After: the HTML output of xml2rfc.
|.xml|| [Before: if an XML file exists, the RFC Editor can provide it on request.]|
After: the source file; the output of the preptool
|.json||metadata file; see  for details.|
|.txt.pdf|| Before: PDF created directly from the TXT
[After: This file does not exist. It is replaced by the PDF output of xml2rfc.]
|.notprepped.xml|| The source file before using
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