Thread: Possible replacement for EPUBCHECK
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Old 07-17-2026, 04:33 PM   #96
Doitsu
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@KevinH

Out of curiosity, I tested an epub3 book with some elements that were at one point deprecated in XHTML.

Spoiler:
Code:
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml" xmlns:epub="http://www.idpf.org/2007/ops">
<head>
  <title>Obsolete elements</title>
</head>

<body>
  <h1>Obsolete elements</h1>

  <p>This paragraph uses the <big>big</big> tag, which was deprecated in HTML5, but was still valid in XHTML 1.1.</p>

  <center><p>This paragraph uses <font color="red" size="+1">colored, resized font</font> text, along with <s>strikethrough (s)</s>, <strike>strikethrough (strike)</strike>, and <u>underlined</u> text.</p></center>
</body>
</html>


epubveri flagged: big, center, font and strike.

However, EPUBCheck only flagged big and center.

EPUBCheck output:

Spoiler:
Code:
Validating using EPUB version 3.3 rules.
ERROR(RSC-005): OEBPS/Text/Section0001.xhtml(12,35): Error while parsing file: element "big" not allowed here; expected the element end-tag, text, element "a", "abbr", "area", "audio", "b", "bdi", "bdo", "br", "button", "canvas", "cite", "code", "data", "datalist", "del", "dfn", "em", "embed", "epub:switch", "i", "iframe", "img", "input", "ins", "kbd", "label", "link", "map", "mark", "meta", "meter", "ns1:math", "ns2:svg", "object", "output", "picture", "progress", "q", "ruby", "s", "samp", "script", "select", "slot", "small", "span", "strong", "sub", "sup", "template", "textarea", "time", "u", "var", "video" or "wbr" (with xmlns:ns1="http://www.w3.org/1998/Math/MathML" xmlns:ns2="http://www.w3.org/2000/svg") or an element from another namespace
ERROR(RSC-005): OEBPS/Text/Section0001.xhtml(14,11): Error while parsing file: element "center" not allowed here; expected the element end-tag, text, element "a", "abbr", "address", "area", "article", "aside", "audio", "b", "bdi", "bdo", "blockquote", "br", "button", "canvas", "cite", "code", "data", "datalist", "del", "details", "dfn", "dialog", "div", "dl", "em", "embed", "epub:switch", "epub:trigger", "fieldset", "figure", "footer", "form", "h1", "h2", "h3", "h4", "h5", "h6", "header", "hgroup", "hr", "i", "iframe", "img", "input", "ins", "kbd", "label", "link", "main", "map", "mark", "menu", "meta", "meter", "nav", "ns1:math", "ns2:svg", "object", "ol", "output", "p", "picture", "pre", "progress", "q", "ruby", "s", "samp", "script", "search", "section", "select", "slot", "small", "span", "strong", "sub", "sup", "table", "template", "textarea", "time", "u", "ul", "var", "video" or "wbr" (with xmlns:ns1="http://www.w3.org/1998/Math/MathML" xmlns:ns2="http://www.w3.org/2000/svg") or an element from another namespace


Would you agree that this is an actual EPUBCheck bug?
Last edited by Doitsu; 07-17-2026 at 04:35 PM.
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