Discrepancy in accessibilitySummary Metadata Requirement

daisy / ace

Ace by DAISY, an Accessibility Checker for EPUB

MIT License

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Discrepancy in accessibilitySummary Metadata Requirement #389

Open gregoriopellegrino opened 11 months ago

gregoriopellegrino commented 11 months ago

Please provide the following details if possible or relevant:

Ace version: 1.3.2
Node version: v18.16.1
my OS: macOS 13.5.1

Ace currently flags EPUB publications for missing the 'schema:accessibilitySummary' metadata, while the EPUB Accessibility 1.1 standard indicates that this metadata is no longer mandatory (unlike EPUB Accessibility 1.0).

Iacobus1983 commented 6 months ago

I've just noticed the same problem. https://kb.daisy.org/publishing/docs/metadata/schema.org/accessibilitySummary.html states that "If the summary does not offer any new information, the property can be omitted from digital publications."

Iacobus1983 commented 6 months ago

A relevant statement is here: "accessibilitySummary metadata is now recommended (SHOULD), not required (MUST). The impact/severity is downgraded from serious to moderate."

Cf. also https://github.com/daisy/ace/blob/d56a8e1c927c49ee450ceaaa670efdb21dd2fb5f/website/content/rules/epub.md?plain=1#L9