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Ticket #39 (closed defect: wontfix)

Opened 5 years ago

Last modified 4 years ago

Warn about mistaken conversion for non-BMP characters

Reported by: duerst@it.aoyama.ac.jp Owned by:
Priority: minor Milestone:
Component: 3987bis Version:
Severity: - Keywords:


Find a place to note that some older software transcoding to UTF-8 may produce illegal output for some input, in particular for characters outside the BMP (Basic Multilingual Plane). As an example, for the IRI with non-BMP characters (in XML Notation):
which contains the first three letters of the Old Italic alphabet,
the correct conversion to a URI is

Change History

comment:1 Changed 4 years ago by masinter@adobe.com

  • Status changed from new to closed
  • Resolution set to wontfix

I'm reluctant to add a warning about a situation whose likelihood is unclear without more evidence that mis-implementations of UTF-8 are in practice still deployed and a difficulty.

If there's any evidence that we actually need to do this, please re-open ticket.

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