I've now switched all files over to using the new schema, and standardized them all on the xml-model processing instruction, replacing the oxygen and oasis-schema PIs wherever they occurred. I've also trimmed out a bunch of old unnecessary namespace declarations from root elements.

Following that, I've worked extensively on the Le Blanc, which had a disastrous document model; some chapters were identified as such and some not; chapters were embedded within chapters within other chapters; other divs were left hanging outside chapters; and the structure took no account at all of the volume's organization into four books. That's all now fixed, along with many typos or layout issues I came across while working on it, but it will need proofing again eventually. I'm going to spend a little more time going through LCC's list of issues while I'm focused on that text, though.