diff --git a/src/Timeline.cpp b/src/Timeline.cpp
index ef91c636..c7454bca 100644
--- a/src/Timeline.cpp
+++ b/src/Timeline.cpp
@@ -69,14 +69,36 @@ void Timeline::exclude (const Exclusion& exclusion)
 ////////////////////////////////////////////////////////////////////////////////
 std::vector <Interval> Timeline::tracked (Rules& rules) const
 {
+  // TODO Create a range representing the whole timeline.
+
+  // TODO Intersect this range with the outer range of all inclusions.
+
+  // TODO Obtain holidays.
+  // TODO for each exclusion:
+  // TODO   if "exc day off <date>":
+  // TODO     add <date> as a holiday.
+  // TODO   if "exc day on <date>":
+  // TODO     if <date> matches a holiday:
+  // TODO       remove <date> as a holiday
+
+  // TODO for each inclusion:
+  // TODO   for each holiday:
+  // TODO     intersect intelligently.
+
+  // TODO   for each exclusion:
+  // TODO     generate a set of ranges to exclude.
+  // TODO     for each excluded range:
+  // TODO       intersect intelligently.
+
+  // TODO Return results, which should be the stored inclusions, clipped by
+  //      subtracting all the exclusions nad holidays.
+
 /*
   std::vector <Interval> combined;
 
-  // TODO Combine _inclusions and _exclusions to yield a set of collapsed
-  //      intervals.
-
   return combined;
 */
+
   return _inclusions;
 }