general-purpose macro/programming language for transforming text

 Zoem is a language for transforming text. It supports the creation of
 light-weight mark-up languages as macro packages built on top of zoem.
 .
 Zoem submits text to a two-stage transformation process. Macro
 expansion and interpretation is followed by application of
 customizable character filtering rules. Zoem supports inside-out
 evaluation, comprehensive IO, control operators, iteration,
 dictionary stacks, multidimensional data storage, arithmetic
 expressions, regular expressions, system commands, and more.