There's a proliferation of groups of bibls which apply to the same preceding item (seg, phr, etc.), so I've written some XSLT to collapse them to a single bibl. My plan to move from bibl/@corresp to @resp on the preceding element has been thwarted by the fact that <phr> cannot take @resp. I'll need to re-think. I don't like <bibl>, which doesn't really make sense, and for quotes we can use @ref instead, but I'd like to use a unified mechanism for <seg> and <phr>.