# OPF-086b: deprecated epub:type value, how to fix it

Source: https://epubcc.com/epubcheck/opf-086b/ (updated 2026-11-04)

EPUBCheck OPF-086b is a usage message: “epub:type value "…" is deprecated. Consider using … instead.” An epub:type value is deprecated; EPUBCheck names the value and its replacement. It is a usage note (shown with -u), for example "note" replaced by "footnote" or "endnote".

- Official message (EPUBCheck 5.4.0): epub:type value "%1$s" is deprecated. Consider using %2$s instead.
- Default severity: Usage

## Typical causes

- Content written for earlier versions of the EPUB structural semantics vocabulary.
- Templates or converters that still write note, rearnote, sidebar or marginalia.
- Notes copied from older books.

## How to fix it

1. Find the elements with the value EPUBCheck names.
2. Replace it as suggested: note becomes footnote or endnote, rearnote becomes endnote.
3. For sidebar and marginalia, use a plain aside element without that epub:type.

## When it's not this

If the value is not in the vocabulary at all, EPUBCheck reports OPF-088.

## Sources

- EPUB 3.3, §C.2 The epub:type attribute: https://www.w3.org/TR/epub-33/#sec-epub-type-attribute (read 2026-11-04)

Message text and severity: EPUBCheck (W3C, BSD-3-Clause). Explanation: EpubCC.