Working through the first of the modern articles, I'm finding some particular issues to record:

• We need to link from citations in the text to biblio refs in the document itself, in the <back>. I've settled on doing this with <bibl corresp="#dejean_2005"> (pointing at the xml:id of the <bibl> tag with the full reference).
• We need to link out to references in the central bibliography file. For that, I've settled on <bibl corresp="../biblio/biblio.xml#mercier_2005">, where the path is relative within the db structure and the corresponding directory structure on my system, and in any case the type of link can be recognized through the presence of biblio.xml. These references will need to be pulled into the article when it's being rendered.
• We need to link to documents in the anthology itself. These are not really citations; they're references and intended as links. For this, I've gone for <ref target="xhtml.xq?id=operateur_cephalique">; which should work in context (all documents are accessed through URLs in the root of the site), and which can also be expanded to a full URL if necessary.
• Footnotes often include references, which will lead to the same kind of embedding problem we have with references referencing other references. I think a site-wide solution might be achieved for this in JavaScript, whereby the popup element is cloned so two items can be displayed at the same time.
• I've used <cit rend="block">, which will need some specific handling. Once this is done, it might be repurposed to handle those references which include multi-paragraph quotes.