7.1.5 Other Characters
The other-chars element type form declares the names of characters in the character repertoire which do not correspond to characters defined in ISO/IEC 10646-1 or ISO/IEC 6429.
The content of the element shall consist of a list of character names.
<other-chars>
logoSGML runic-f runic-u
</other-chars>
These declarations are cumulative.