作者別: kzakza

ONIX for Books の電子書籍用アクセシビリティメタデータ (Codelist 196)

kzakza

　ONIX for Booksは、ロンドンに拠点を置く国際団体EDItEUR(European Book Sector Electronic Data Interchange Group) により開発･管理されている書籍流通における商品情報としてのメタデータです。現在は、2009年にバージョン3.0 が公開され、このバージョン3で更新が続いている（現在はバージョン3.07）。日本においても、JPO近刊情報センターがONIX for Books 3.0系の採択を2012年に発表している（参考: JPOプレスリリース2/9「JPO近刊情報センター ONIX3.0の採択を決定」）。

　このONIX for Booksに電子書籍用のアクセシビリティメタデータがCodelist196としてに規定されています。

EDItEURがONIXでのアクセシビリティメタデータの提供について解説文書も出しています。

使用例

<ProductFormFeatureType>09</ProductFormFeatureType>がList196のコードを使用していると意味を持ち（09のコード値はList 76: Product form feature typeのもの）、 <ProductFormFeatureValue>に上のList196のコード値を記述します。

以下だと、03、10、11、13のコード値が使用されているので、この電子書籍は以下のアクセシビリティの機能を備えていることを意味している。それぞれの意味は上のList196の解説参照。

  • 03 Epub Accessibility Specification 1.0 AA
  • 10 No reading system accessibility options disabled (except)
  • 11 Table of contents navigation
  • 13 Reading order

    上位にある<ProductFormFeature>や < DescriptiveDetail>等の使い方はONIX 3.0 Specificationsを参照のこと。


<ONIXMessage release="3.0">

  <Header>
    …
  </Header>

  <Product>
    …
    <DescriptiveDetail>
      <ProductFormFeature>
        <ProductFormFeatureType>09</ProductFormFeatureType>
        <ProductFormFeatureValue>03</ProductFormFeatureValue>
      </ProductFormFeature>
      <ProductFormFeature>
        <ProductFormFeatureType>09</ProductFormFeatureType>
        <ProductFormFeatureValue>10</ProductFormFeatureValue>
      </ProductFormFeature>
      <ProductFormFeature>
        <ProductFormFeatureType>09</ProductFormFeatureType>
        <ProductFormFeatureValue>11</ProductFormFeatureValue>
      </ProductFormFeature>
      <ProductFormFeature>
        <ProductFormFeatureType>09</ProductFormFeatureType>
        <ProductFormFeatureValue>13</ProductFormFeatureValue>
      </ProductFormFeature>
    </DescriptiveDetail>
    …
    <TitleDetail>
      <TitleType>01</TitleType>
      <TitleElement>
        <TitleElementLevel>01</TitleElementLevel>
        <TitleText>Accessible EPUB 3</TitleText>
      </TitleElement>
    </TitleDetail>
    …
  </Product>
</ONIXMessage>

Accessible Publishing Knowledge Baseの”Example 1 — Sample ONIX message featuring accessibility information”より

Codelist196

　Codelist196を以下に転載します。このエントリを執筆時点で最新の Codelists Issue 47(2019年10月31日)公開時点。

Issueは、ONIX Codelists Issue改定に付された連番みたいなもの。Codelists Issueを追っていくと、初出時点と更新を追うこともできる（この表では、初出と最後の更新のみ）。

Codelist196
Code value Label Note First added issue Most recently revised issue
00 Accessibility summary contains a short explanatory summary of the accessibility of the product, consistent with the more specific conformance and feature details provided. The summary should note both the accessibility features provided and any potential deficiencies. More detailed information may be provided in an external file using codes 94–96. For use in ONIX 3.0 only 37 46
01 LIA Compliance Scheme 16
02 EPUB Accessibility Specification 1.0 A Conforms with the requirements of EPUB Accessibility Spec 1.0 and WCAG level A. may carry a URL linking to a compliance report or certification provided by an independent third party certifier. In the absence of a URL, conformance with the requirements of the Accessibility Specification is self-certified by the publisher 36 46
03 Epub Accessibility Specification 1.0 AA Conforms with the requirements of EPUB Accessibility Spec 1.0 and WCAG level AA. may carry a URL linking to a compliance report or certification provided by an independent third party certifier. In the absence of a URL, conformance with the requirements of the Accessibility Specification is self-certified by the publisher 36 46
05 PDF/UA Conforms with the requirements of ISO 32000-1:2008 plus ISO 14289-1:2014 – Portable Document Format for Universal Accessibility. For use in ONIX 3.0 only 46
09 Inaccessible Known to lack significant features required for broad accessibility. For use in ONIX 3.0 only 40
10 No reading system accessibility options disabled (except) No accessibility features offered by the reading system, device or reading software (including but not limited to choice of text size or typeface, choice of text or background color, text-to-speech) are disabled, overridden or otherwise unusable with the product EXCEPT – in ONIX 3 messages only – those specifically noted as subject to restriction or prohibition in . Note that provision of any significant part of the textual content as images (ie as pictures of text, rather than as text, and without any textual equivalent) inevitably prevents use of these accessibility options 15 46
11 Table of contents navigation Table of contents allows direct (eg hyperlinked) access to all levels of text organization above individual paragraphs (eg to all sections and subsections) and to all tables, figures, illustrations etc. Non-textual items such as illustrations, tables, audio or video content may be directly accessible from the Table of contents, or from a similar List of illustrations, List of tables, etc 15
12 Index navigation Index provides direct (eg hyperlinked) access to uses of the index terms in the document body 15
13 Reading order All or substantially all textual matter is arranged in a single logical reading order (including text that is visually presented as separate from the main text flow, eg in boxouts, captions, tables, footnotes, endnotes, citations, etc). Non-textual content is also linked from within this logical reading order. (Purely decorative non-text content can be ignored) 15
14 Short alternative descriptions All or substantially all non-text content has short alternative descriptions, usually provided via alt attributes. Note this applies to normal images (eg photographs, charts and diagrams) and also to any embedded audio, video etc. Audio and video content should include alternative descriptions suitable for hearing-impaired as well as for visually-impaired readers. (Purely decorative non-text content can be ignored, but the accessibility of resources delivered via a network connection rather than as part of the e-publication package must be included) 15
15 Full alternative descriptions All or substantially all non-text content has full alternative descriptions. Note this applies to normal images (eg photographs, charts and diagrams) and also to any embedded audio, video etc. Audio and video content should include full alternative descriptions (eg audio-described video) and transcript, subtitles or captions (whether closed or open) suitable for hearing-impaired as well as for visually-impaired readers. (Purely decorative non-text content can be ignored, but the accessibility of resources delivered via a network connection rather than as part of the e-publication package must be included) 15 46
16 Visualised data also available as non-graphical data Where data visualisations are provided (eg graphs and charts), the underlying data is also available in non-graphical (usually tabular, textual) form 15
17 Accessible math content Mathematical content such as equations is usable with assistive technology, eg through use of MathML. Semantic MathML is preferred but Presentational MathML is acceptable 15
18 Accessible chem content Chemistry content such as chemical formulae is usable with assistive technology, eg through use of ChemML 15
19 Print-equivalent page numbering For a reflowable e-publication, contains references to the page numbering of an equivalent printed product. Use with relation code 13 to specify an identifier for the source of the page numbers 15 46
20 Synchronised pre-recorded audio Text-synchronised pre-recorded audio narration (natural or synthesised voice) is included for substantially all textual matter, including all alternative descriptions 15
21 Text-to-speech hinting provided Text-to-speech has been optimised through provision of PLS lexicons, SSML or CSS Speech synthesis hints 19
22 Language tagging provided The language of the text has been specified (eg via the HTML or XML lang attribute) to optimise text-to-speech (and other alternative renderings), both at whole document level and, where appropriate, for individual words, phrases or passages in a different language 20
24 Dyslexia readability Specialised font, character and/or line spacing, justification and paragraph spacing, colouring and other options provided specifically to improve readability for dyslexic readers. Details, including the name of the font if relevant, should be listed in 33 46
94 Compliance web page for detailed accessibility information carries the URL of a web page giving further detailed description of the accessibility features, compatibility, testing etc. The web page should be maintained by an independent compliance scheme or testing organization 19
95 Trusted intermediary’s web page for detailed accessibility information carries the URL of a web page giving further detailed description of the accessibility features, compatibility, testing etc. The web page should be provided by a trusted intermediary or third party nominated by the publisher 19
96 Publisher’s web page for detailed accessibility information carries the URL of a web page giving further detailed description of the accessibility features, compatibility, testing etc. The web page should be provided by the publisher 19
97 Compatibility tested carries the URL of a web page giving a short description of compatibility testing carried out for this product, including detailed compatibility with various assistive technology such as third-party screen-reading software. See also code 00 for a summary of the accessibility features of the product itself 15
98 Trusted Intermediary contact carries the e-mail address for a contact at a ‘trusted intermediary’, to whom detailed questions about accessibility for this product may be directed 15
99 Publisher contact for further accessibility information carries the e-mail address for a contact at the publisher to whom detailed questions about accessibility of this product may be directed 15

参考

W3CのEPUBのアクセシビリティメタデータに関するドキュメント

kzakza

W3C EPUB 3 Community Group がEPUBのアクセシビリティメタデータに関するドキュメントの整備に向けて動いています。

　まだ、一部、手がつけられてない項目もあるようですが、ドラフト版を確認することができます。