We discovered we needed the @subtype attribute on <phr>, and it wasn't available, so I went back to the schema. What I have is a manually-modified RNG file; the original was generated from Roma back before P5 was finally released, and I think Roma was broken at one point, hence the manual modification to the RNG (to allow <bibl> in <entry>). I discover now, though, that there were significant changes to the dictionary markup between the generation of my schema and the release of P5. Specifically, dicteg now no longer exists (<cit> and/or <q> and/or <quote> should be used), and it looks as though @subtype is now available on <phr>. However, if I generate a new schema, all the old data will be invalid because of <dicteg>, so as a temporary measure I've made another manual modification to the old schema to allow @subtype on <phr>, and we're sticking with the old schema until I get the chance to generate a new one, figure out the issues, re-process all the old markup, and rewrite the XSLT. Not a huge task, but an annoying and unexpected addition to the workload.