f: flat
l: abstraction
n: native type annotation
+
+NAMING CONVENTIONS FOR TRANSFORMATIONS AND RELATED FORMS
+
+- first letter
+
+c: contex-sensitive for terms
+f: context-freee for closures
+l: sn contex-sensitive for local environments
+r: dx contex-sensitive for local environments
+t: context-free for terms
+
+-second letter
+
+i: irreducible form
+n: normal form
+p: parallel transformation
+r: reducible form
+s: sequential transformation
+
+- third letter
+
+c: conversion
+d: decomposed extended reduction
+q: restricted reduction
+r: reduction
+s: substitution
+x: extended reduction
+
+- forth letter (if present)
+
+e: reflexive transitive closure to normal form (evaluation)
+p: non-reflexive transitive closure (plus)
+q: reflexive closure (question)
+s: reflexive transitive closure (star)