To include raw content in a prefix, suffix, delimiter, or term, surround it with these tags indicating the format:
{{jats}}<ref>{{/jats}}Without the tags, the string will be interpreted as a string and escaped in the output, rather than being passed through raw.
This feature allows stylesheets to be customized to give different output for different output formats. However, stylesheets customized in this way will not be usable by other CSL implementations.