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Left-to-right prose with an Arabic run isolated by dir="rtl" and a Latin identifier isolated by dir="ltr" inside an Arabic phrase. The everyday bidi case that breaks when a renderer applies paragraph direction to every character in the paragraph.
A book whose two navigation surfaces tell different stories: the NCX reorders the chapters, omits one, and points at a chapter9.xhtml that does not exist, while nav.xhtml is correct. For testing which surface a reader trusts and how it handles a dead NCX target.
The dual-navigation build every commercial EPUB 3 ships: an XHTML navigation document for EPUB 3 readers and a matching NCX for EPUB 2 ones, listing the same three chapters in the same order.
A conforming EPUB 3 navigated solely by an XHTML navigation document, with no NCX fallback at all. The modern baseline, and the twin of the NCX-only book that inverts it.
An EPUB 3 carrying print-page navigation: a hidden page-list nav, matching pagebreak markers in the content with doc-pagebreak roles, and an equivalent NCX pageList. For testing go-to-page features and the page-number reporting that accessibility conformance asks for.
The reflowable twin of the fixed-layout plate book: rendition:layout is reflowable, nothing is absolutely positioned, and the text is free to rewrap. Use it as the control when checking whether a reader honours the pre-paginated flag or silently reflows everything.
An EPUB 3 in Arabic that declares page-progression-direction="rtl" in the spine, dir="rtl" on the body, and a right-aligned stylesheet. Paired with a left-to-right control carrying the same structure, so a reader's page-turn direction can be checked rather than assumed.
The right-to-left case again in an unconnected script: Hebrew, with the same rtl spine direction and body dir. Arabic shaping and Hebrew ordering fail independently, so a reader that handles one is not proven to handle the other.
An EPUB 3 whose one content document declares properties="scripted" and contains a single inline script that rewrites one paragraph. It makes no network request and reads correctly with scripting switched off, so it tests the property and the fallback rather than the script.
The pathological spine: every itemref is marked linear="no", so the book declares no default reading order at all. For testing what a reader opens to when the sequence it was going to page through is empty.
Three linear chapters followed by endnotes and a colophon marked linear="no": present in the package and linked from the text, but outside the page-through sequence. The single most misread spine attribute in EPUB.
An intentionally invalid spine that references chapter one twice, in first and second position. Intentionally invalid and clearly labelled - it exposes pagination and progress code that assumes spine positions map one-to-one onto documents.
An EPUB 3 whose first spine item is an SVG content document rather than XHTML, followed by a chapter that explains what should have appeared. For testing readers that assume every reading-order document is XHTML.
A fixed-layout cover built as an SVG content document that pulls in a PNG through xlink:href and centres it as a single-page spread. For testing cover extraction, which usually looks for a raster and finds vector markup instead.
The package document is encoded as UTF-16 little-endian with a byte order mark while the content documents stay UTF-8 - a combination EPUB permits and almost nothing tests. For finding the parser that opens the OPF as UTF-8 and sees a file full of null bytes.
The package document, the navigation document and the chapter each begin with a UTF-8 byte order mark before the XML declaration. Legal, and the classic reason a strict parser reports content before the prolog on a file that looks perfectly fine in an editor.
A Japanese EPUB 3 set in vertical-rl, declaring writing-mode with the standard property plus the -epub- and -webkit- prefixes readers actually implement, and an rtl spine so pages turn the way a tategaki book does.
The same book as EPUB 3, navigated by an XHTML navigation document (with an NCX fallback for older readers). The modern twin in an EPUB2↔EPUB3 conversion set.
The same SAMPLE book content with a sans-serif stylesheet: CSS twin of the serif EPUB.
An EPUB 3 sample styled with a serif stylesheet. Pair with the sans CSS twin for reader CSS tests.
A valid EPUB 3 e-book with a cover image, an EPUB navigation document, styled chapters, and a correctly stored OCF mimetype. Original content, for testing EPUB readers and EPUB→other conversion.
A plain-text index of every EPUB and FB2 fixture in this wave: its validity class, its subcategory, and the scenario and expected result published for it. Generated from the same entry list that builds the catalogue, so it cannot describe a file that is not there.
EPUB 3 SAMPLE with landmarks nav for reader TOC/landmark tests.
EPUB 3 SAMPLE with landmarks nav for reader TOC/landmark tests.
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