://www.w3.org/TR/epub-33/#sec-container-iri">specificities of URLs</a> in the case of packaged contents. These features have their counterpart in the <a href="https://www.w3.org/TR/epub-rs-33/">EPUB 3.3 Reading Systems</a> document and they share the relevant tests. In other words, some of the aforementioned tests, and their implementations, are also relevant for the core <a href="https://www.w3.org/TR/epub-33/">EPUB 3.3</a> document.
                    </p>
                </li>
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