| find_between | Find between a pattern | 
| md_ns | Aliased namespace prefix for commonmark | 
| protect_curly | Protect curly elements for further processing | 
| protect_math | Protect math elements from commonmark's character escape | 
| stylesheet | The tinkr stylesheet | 
| to_md | Write YAML and XML back to disk as (R)Markdown | 
| to_xml | Transform file to XML | 
| yarn | R6 class containing XML representation of Markdown |