Comment above refers to <sc> and <span class="nocase"> tags.
The documentation does list another variant for small caps, which is preferred. As for "nocase", it's a bit of a hack, but I guess at this point we might as well adopt it officially. IIRC there also needs to be a "force case" option too.
Within certain fields (anything that mixes languages within one publication), the nocase option makes things much easier. I wasn't aware that it wasn't yet official; that would explain its absence in the documentation.
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The documentation does list another variant for small caps, which is preferred. As for "nocase", it's a bit of a hack, but I guess at this point we might as well adopt it officially. IIRC there also needs to be a "force case" option too.