Disqualify delimiter: Used to disqualify a token from being treated as a surrounding pair delimiter. This will usually be operators containing `>` or `<`, eg `<`, `<=`, `->`, etc
Environment
Environment: An environment, eg in LaTeX
Interior
Element: The interior/children of an XML element
Xml both tags
Tags: Both tags in an xml element
Xml element
Element: An xml/html element. Also used for LaTeX environments