Flow control

Some directives can be used to manipulate the contents of the document in response to some conditions. Indeed, this subset of available directives are designed to act as a small Turing-complete programming language.

Over the following sections, we will explore directives for:

• Branching .case .if
• Looping .foreach
• Handling directives .call .def .exists .undef
• Handling variables .defined .get-var .set-var