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daisy / ace

Ace by DAISY, an Accessibility Checker for EPUB
MIT License
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certifiedBy and certifierCredentials not being identified #383

Closed clapierre closed 1 year ago

clapierre commented 1 year ago

In the latest version of ACE Ace (Command line v1.2.7) Ace (App v1.1.5)

the following metadata as defined in the Accessibility 1.1 specification (which allows for refines pointing to an id) to be included is not being picked up by the ACE checker.

IE:

Missing accessibility Metadata: a11y:certifiedBy a11y:certifierCredential

Although inside the EPUB's OPF file the following metadata is provided.

    <meta property="dcterms:conformsTo" id="conf">EPUB Accessibility 1.1 - WCAG 2.1 Level AA</meta>
    <meta property="a11y:certifiedBy" id="certifier" refines="#conf">Benetech</meta>
    <meta property="a11y:certifierCredential" refines="#certifier">GCA</meta>
clapierre commented 1 year ago

@danielweck any way this can be addressed so I can recommend the new metadata for the Accessibility 1.1 Specification to all our GCA partners?

danielweck commented 1 year ago

Hello Charles, I am working on a fix for metadata refines. Regards, Daniel

clapierre commented 1 year ago

Hi @danielweck any progress on these various refines for metadata? Would like to be able to start having publishers ready to use the updated metadata once the 1.1 specification becomes a WC3 recommendation which we are now currently voting on in the W3C.

danielweck commented 1 year ago

Hello Charles, I pushed a bugfix to enable support for refined accessibility metadata. I also updated code in both Ace (command line) and Ace App (graphical user interface) to handle dcterms:conformTo as per both accessibility specification versions 1.0 and 1.1 (i.e. legacy IDPF WCAG URLs vs. new string labels).

Some background information: the original reason for the wholesale exclusion of refines associations was that this is used (for example) to declare the media overlays duration of individual resources instead of the publication as a whole, or (for example) to declare that a dc:title is in fact a title-type = subtitle. The current metadata parsing model discards "refine" information, which is not ideal as this causes a loss of semantics, but this approach has historically greatly simplified processing (notably in the Ace GUI metadata editor).

clapierre commented 1 year ago

Thanks @danielweck When will there be a new version of the Ace App? Still shows 1.1.5

danielweck commented 1 year ago

Hello Charles, the release is currently blocked by internal updates of a core software component which are causing regressions, I am looking into the technicalities of releasing an intermediary package that would only contain the EPUB a11y specification updates.