pe</span></code></a>
<strong id="grammar-token-sf-literal_char"><span id="grammar-token-literal-char"></span>literal_char      </strong> ::=  &lt;a character other than '{', '}' or '%'&gt;
<strong id="grammar-token-sf-modifier"><span id="grammar-token-modifier"></span>modifier          </strong> ::=  &quot;E&quot; | &quot;O&quot;
<strong id="grammar-token-sf-chrono_type"><span id="grammar-token-chrono-type"></span>chrono_type       </strong> ::=  &quot;a&quot; | &quot;A&quot; | &quot;b&quot; | &quot;B&quot;