daisy/pipeline

epubcheck notes "ERROR" for rule OPF-028 in generated EPUB3 OPF

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jbrugge commented

Expected Behavior

When running the dtbook-to-epub3 script on DAISY books that have pagebreaks in them, the EPUB3 result should have an OPF file that passes epubcheck.

Actual Behavior

Running epubcheck against the generated output generates a report noting an issue with a meta item in the OPF.
{ "ID" : "OPF-028", "severity" : "ERROR", "message" : "Undeclared prefix: \"dc\".", "additionalLocations" : 0, "locations" : [ { "url" : { "opaque" : false, "hierarchical" : true }, "path" : "EPUB/package.opf", "line" : 2, "column" : 1359, "context" : null }

The line that this points to in the attached EPUB3 OPF is this:
<meta xmlns:f="http://www.daisy.org/ns/pipeline/internal-functions" xmlns:pf="http://www.daisy.org/ns/pipeline/functions" xmlns:rdfa="rdfa-functions" property="dc:date">2023-04-20T22:13:09+00:00</meta>

Steps to Reproduce

The sample book in #674 exhibits this issue, so refer to the EPUB3 output from that.

The epubcheck report was then generated with this:
epubcheck --json Sherlock_Holmes-epubcheck.json The_Adventures_of_Sherlock_H.epub

Environment

  • Operating system: Linux 64-bit
  • DAISY Pipeline 2 version: 1.14.7
  • Interface: web service API
  • epubcheck : 5.0.1

Logs

epubcheck JSON report