Skip to content
EPUBCheck · Package document (OPF)

OPF-085

Updated:

EPUBCheck OPF-085 is a warning message: “"dc:identifier" value "…" is marked as a UUID, but is an invalid UUID.” A dc:identifier says it is a UUID (urn:uuid:) but the value is not a valid UUID.

The official message

"dc:identifier" value "%1$s" is marked as a UUID, but is an invalid UUID.

Default severity
Warning. The EPUB is still valid, but something is likely to cause problems in some reading apps. EPUBCheck exits with 0 unless you pass --failonwarnings.
EPUBCheck version
5.4.0

%1$s, %2$s… are filled in with the file, value or element EPUBCheck found.

Typical causes

  • A shortened, mistyped or invented value after urn:uuid:.

How to fix it

  • Use a real UUID in the form 8-4-4-4-12 hexadecimal digits, or drop the urn:uuid: prefix if the identifier is something else.

Terms used here

Other OPF messages

  • OPF-086 Property "…" is deprecated. Consider using … instead.
  • OPF-086b epub:type value "…" is deprecated. Consider using … instead.
  • OPF-088 Unrecognized epub:type value "…".
  • OPF-090 It is encouraged to use MIME media type "…" instead of "…".

Message text and severity from EPUBCheck 5.4.0 (W3C, BSD-3-Clause). Explanation by EPUBLab.

FAQ

What does EPUBCheck OPF-085 mean?

EPUBCheck OPF-085 is a warning message: “"dc:identifier" value "…" is marked as a UUID, but is an invalid UUID.” A dc:identifier says it is a UUID (urn:uuid:) but the value is not a valid UUID.

Is OPF-085 an error?

OPF-085 is reported as warning by default. The EPUB is still valid, but something is likely to cause problems in some reading apps. EPUBCheck exits with 0 unless you pass --failonwarnings.