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diff --git a/doc/docu.md b/doc/docu.md
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# Data strucures
-?
+Possible data structure layout
+
```C
typedef struct Subject{
char * name;
time_t * created;
time_t * deadline;
- int priority;
} Subject;
typedef struct Event {
- Subject * subject;
+ Subject *subject;
time_t plannedStartTime;
time_t plannedEndTime;
+ int priority;
bool done;
}Event;
@@ -22,3 +23,11 @@ typedef struct DayPlan{
Event * plan;
}DayPlan;
```
+
+## Functionality
+
+Day plan can either be crated from user input or read from file to continue previous day.
+
+priority and available time are used to create dayplan which is exported as iCal
+
+after task is completed and priorities are updated for next day and stored in file.