# OPF-086: deprecated package property, how to fix it

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

EPUBCheck OPF-086 is a warning message: “Property "…" is deprecated. Consider using … instead.” A metadata property is deprecated; EPUBCheck names the property and the replacement to use. Deprecated properties still work in many reading apps, but newer ones may ignore them.

- Official message (EPUBCheck 5.4.0): Property "%1$s" is deprecated. Consider using %2$s instead.
- Default severity: Warning

## Typical causes

- Package documents written for older EPUB 3 versions, before EPUB 3.3 deprecated some properties.
- Rendition properties or link relations that EPUB 3.3 has replaced or no longer supports.
- Metadata copied from an old template or produced by an older version of an authoring tool.

## How to fix it

1. Read the property and the replacement EPUBCheck suggests in the message.
2. Replace the property with the suggested one, keeping the same value if the replacement takes one.
3. Remove it if it is no longer needed for anything, then run EPUBCheck again to confirm the warning is gone.

## When it's not this

If it is an epub:type value that is deprecated, that is OPF-086b; a deprecated prefix is OPF-086c.

## Sources

- EPUB 3.3, §A.2 Deprecated features: https://www.w3.org/TR/epub-33/#deprecated (read 2026-11-04)

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