Codex

The  is essentially an encyclopedia for mob types and mission types in warframe. In order to obtain information for the codex players will need to use data samples (a new item that can be added to the gear menu). The Data Samples can be shot at mobs or mission objects which will then collect information and add that information to the codex. Once all information has been discovered on a mob/mission type the player will obtain a bonus towards the corresponding mob/mission type.

Missions

 * This was only talked about - not shown - in the livestream.

Missions will have a special object (mainframe or reactor) that will provide information when shot with the data sample.

There is a variety of information that can be gathered on each mission:
 * Drop Tables

It is unknown if there is a bonus associated once all information is discovered.

Mobs
There is a variety of information that can be gathered on each mob:
 * Lore
 * Faction
 * Level Range
 * Regions
 * Health
 * Armor
 * Shield
 * Mod Drops (and rarity)

The player gains a Critical Bonus (unknown if chance or damage) against the mob once all information is discovered.