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benetech / UX-Guide-EPUB-A11y-Metadata

User Experience Guide for Displaying Accessibility metadata for EPUB
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EPUB and "large print or braille" search #3

Open laudrain opened 5 years ago

laudrain commented 5 years ago

In the overview of this document:

user search queries such as Find all EPUB books that contain large print, or braille, or that has met a certain level of accessibility conformance.

There is no such thing as an EPUB containing "large print or braille". Or, said differently, all EPUB are enabling "large print or braille". Also there no metadata to declare "large print or braille".

clapierre commented 5 years ago

@laudrain , Couldn't a publisher put in accessibilityFeature= "braille" if they actually put in formatted Braille into their publication. Say it was some Braille Tactile map, or maybe some chemistry equation?

Also for Large Print if this was a Children's Picture book with Very Large Print embedded in images with alt-text equivalents. Why couldn't the publisher put in accessibilityFeature= "largePrint"

Both "braille" and "largePrint" are currently listed in the W3C wiki https://www.w3.org/wiki/WebSchemas/Accessibility#Features_for_augmentation

laudrain commented 5 years ago

@clapierre thanks for these 2 use cases. I was thinking to EPUB globally as reflowable text. I understand these properties describe pre-formatted content in the EPUB, either in Braille or largePrint.

For largePrint, the property description says:

The property is not set if the font size can be increased

which is the case in EPUB Reflowable content. Is this property aimed at Fixed Layout EPUBs?

Looking at EPUB ONIX Crosswalk, these 2 properties have not been made available to ONIX code list 196. I'm wondering why.

clapierre commented 5 years ago

@laudrain we are still trying to get ONIX accessibility metadata in sync with EPUB metadata so there are a number of items still missing in ONIX Madeleine Rothberg and Graham Bell are working on a few of these issues now.

As for LargePrint, I would imagine yes FixedLayout LargePrint books would be one such case, and agree that one wouldn't add LargePrint if you are able to increase the font size since every EPUB could claim this essentially. Thanks

madeleinerothberg commented 5 years ago

Reflowable books (which should be the majority of EPUB books) should declare accessibiltyFeature=displayTransformability. From Wayne's comment in email, it is clear we need to better highlight that intention.

As Charles said, largePrint and braille are intended for specialized formats, fixed size large print and braille-ready files, respectively.