EPUB 3 Sample Documents. Contribute to IDPF/epub3-samples development by creating an account on GitHub. IDPF has curated an open source collection of validated samples of EPUB 3 publications that showcase different features, the files are available for download . Purpose: Example of a book with images, text and audio. This book Focus: Sophisticated ePub3 Fixed Layout navigation and content interaction. Optimized for.
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Accessible EPUB 3, Strategies for creating EPUB 3 content that can be read by people with different preferred reading modalities. Free fully working sample ePub3 fixed layout books with audio, video and interactivity, This is a good example of a book that should have pop-up notes and. An EPUB 3 archive has a skeleton – the files which are mandatory to structure the content – and some flesh – the ebook An example of container xml file.
Although EPUB's history is steeped in enabling reflowable content, not all publications lend themselves easily to reflowing. Children's books, comics and manga, magazines and many other content forms require the ability to create page-precise layouts in order to be represented meaningfully.
This metadata enables the dimensions of the page [ ContentDocs32 ] to be controlled, creating a canvas on which elements can be absolutely positioned. The metadata does not just flag whether content is to be fixed or reflowed, but also allows Authors to specify the desired orientation of pages [ Packages32 ], when to create synthetic spreads [ Packages32 ], and how to position pages [ Packages32 ] within those spreads, providing a broad range of control over the presentation of EPUB Publications.
A key concept of EPUB is that content presentation adapts to the user, rather than the user having to adapt to a particular presentation of content. HTML was originally designed to support dynamic rendering of structured content, but over time HTML as supported in Web browsers has become focused on the needs of Web applications, and most popular Web sites now have fixed-format layouts.
EPUB Publications, however, are designed to maximize accessibility for the visually impaired, and Reading Systems typically perform text line layout and pagination on the fly, adapting to the size of the display area, the user's preferred font size, and other environmental factors.
This behavior is not guaranteed in EPUB; images, vector graphics, video and other non-reflowable content might be included, and some Reading Systems might not paginate on the fly, or at all. Nevertheless, supporting dynamic adaptive layout and accessibility has been a primary design consideration throughout the evolution of the EPUB standard.
EPUB 3 also supports CSS styles that enable both horizontal and vertical layout and bo left-to-right and right-to-left writing. For more information on audio and video formats, refer to [ EPUB32 ]. Support for obfuscated font resources is required to accommodate font licensing restrictions for many commercially-available fonts.
It is important to note, however, that EPUB 3 does not require scripting support in Reading Systems, and scripting might be disabled for security reasons.
Authors need to be aware that scripting in an EPUB Publication can create security considerations that are different from scripting within a Web browser. For example, typical same-origin policies are not applicable to content that has been downloaded to a user's local system. Therefore, it is strongly encouraged that scripting be limited to container constrained contexts, as further described in Scripted Content Documents — Content Conformance [ ContentDocs32 ].
In other words, consider limiting scripting to cases where it is essential to the user experience, since it greatly increases the likelihood that content will not be portable across all Reading Systems and creates barriers to accessibility and content reusability. EPUB 3 provides the following text-to-speech TTS facilities for controlling aspects of speech synthesis, such as pronunciation, prosody and voice characteristics:.
Refer to Pronunciation Lexicons [ ContentDocs32 ] for more information. An EPUB Publication is transported and interchanged as a single file a "portable document" that contains the Package Documents, all Content Documents and all other required resources for processing the included Renditions. This approach provides a clear contract between any creator of an EPUB Publication and any system which consumes such EPUB Publications, as well as a reliable representation that is independent of network transport or file system specifics.
EPUB 3 supports alternate representations of all text metadata items in the package metadata section to improve global distribution of EPUB Publications. The alternate-script property [ Packages32 ] can be combined with the xml: The page-progression-direction attribute also allows the content flow direction to be globally specified for all Content Documents to facilitate rendering see the page-progression-direction [ Packages32 ].
SVG Content Documents support the rendering of bidirectional text, but do not include support for ruby. Some specific enhancements include:. As occurs in Web contexts, users in a particular locale might have installed fonts that omit characters required for other locales, and Reading Systems might utilize intrinsic fonts or font engines that do not utilize operating system installed fonts.
To address this problem, EPUB 3 supports the embedding of fonts to facilitate the rendering of text content, and this practice is advised in order to ensure content is rendered as intended. Support for embedded fonts also ensures that characters and glyphs unique to an EPUB Publication can be embedded for proper display.
Refer to Text-to-speech in the Features section for more information on these capabilities.
The OCF container format supports UTF-8, allowing for internationalized file and directory naming of content resources. However, the END specification states, ". Listing 7. Listing 8. Include this namespace primarily to support EPUB semantic inflection additional meaning about the specific purpose an element has in an EPUB content document. If using EPUB 3, you're encouraged to use the expressiveness available in the Structural Semantics Vocabulary to provide context for accessibility software as well as machine processing.
See Related topics for information on the values included in that vocabulary. For a complete example showing conversion of other page map types, see the open source nend application listed is Related topics. The template excerpt in Listing 9 shows how to output a set of nodes from the ncx:navMap. Listing 9.
Outputting the navMap Listing 10 provides an example of a hierarchical NCX. Listing You can download the example files.
Because the id values are preserved from the original file, you should be able to write validation tools to ensure that all of the original nodes are captured. Other options for further transformation include: Updating the metadata in the OPF file from the old Dublin Core scheme to the meta property scheme, as defined in the Publications 3. Where semantic information is available, however, such as pulling from a content management system or other document repository, consider applying semantic inflection to the output.
However, EPUB 3 is based on rapidly maturing web technologies. There's already sufficient information to make broad recommendations about how to use the underlying technologies and when to use existing best practices to produce solid, semantic, accessible markup. Fortunately, backwards compatibility was a design goal of EPUB 3.
You should benefit from the semantic enhancements and enriched metadata in EPUB 3 while still producing documents that are readable on older eReaders. In practice, it might not be possible to sell such content in some eBook marketplaces; they may not accept EPUB 3 because of business rules. However, "sideloading" such content can be expected to work for most conforming EPUB 2 reading systems.
Many reading systems already support a kind of "EPUB 2. You should expect eReading platforms with web browser engines, such as Apple iBooks, to successfully render many of the elements allowed in EPUB 3 content documents. As with any cutting-edge web content, test your content in as many readers as possible before release.
Media Query allows authors to specify that a set of rules and properties applies only to a particular viewing condition, typically based on the size of the viewport. You can also use Media Query to target specific height and width ratios, such as portrait versus landscape.
These features are already in use on some web sites to provide improved user experiences on mobile devices.
Taken together, these principles are called responsive web design. The techniques have proven effective on the web, and in some ways they are even more applicable to book designers.
Book designers draw from decades of research and experimentation in how to effectively present visual information in various sizes and orientations. See Related topics for more on responsive web design. Most eBooks are purely, or primarily, text. However, many publication types require richer layout for marketing reasons or for the essential nature of the content.
With great power comes great responsibility, though. You can't neglect users on mobile devices who want to read the content easily and yet with attractive layouts.
This is where the combined techniques of CSS3 layout and responsive eBook design come together. It uses fixed layout to break paper metaphors with digital content reading. It will work on all ePub3 readers but because it uses asymmetrical page layout and spine linear properties will not display as intended on reading systems with a partial or inflexible implementation of the fixed layout specification.
Multi-language presentation. Fonts for languages. This demonstration ePub 3 test book contains translations of the Universal Declaration of Human Rights in 28 languages from around the world.
Languages include those requiring Latin, scripted, logographic, right to left and more. The IGP introduction has word highlighting. Stave1 has sentence highlighting, Staves 2, 3, 4 have paragraph highlighting and Stave 5 has phrase based highlighting. This is a dramatic reading sourced from www.