The Calendar Slot Type is a very basic entity for the Calendar reservation system and will allow to define these information for each Calendar:
* specify a duration of a slot
* specify how much single persons can enter in that slot
```
$ EXPLAIN calendarslot;
+----------------------------+------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+----------------------------+------------------+------+-----+---------+----------------+
| calendarslot_ID | int(10) unsigned | NO | PRI | NULL | auto_increment |
| calendar_ID | int(10) unsigned | NO | MUL | NULL | |
| calendarslot_date | datetime | NO | MUL | NULL | |
| calendarslot_creation_date | datetime | NO | | NULL | |
| calendarslottype_ID | int(10) unsigned | NO | MUL | NULL | |
| calendarslot_confirmeds | int(10) unsigned | YES | | NULL | |
+----------------------------+------------------+------+-----+---------+----------------+
```