At present we have available the following resources
<xsl:template match="*[@lang='os']/text()">; the
[@lang='os']is necessary because without it, when converting documents written in more than one language, modern cyrillic з and ы may be converted to archaic glyphs. Obviously this should be changed if old cyrillic text is indicated by some other means, and omitted altogether if everything is in old cyrillic.