The Warforged race from the Wayfinder's Guide to Eberron has a unique feature, Integrated Protection, that affects their armor class (AC) and ability to wear armor, detailed below:
Your body has built-in defensive layers, which determine your armor class. You gain no benefit from wearing armor, but if you are using a shield, you apply its bonus as normal.
You can alter your body to enter different defensive modes; each time you finish a long rest, choose one mode to adopt from the Integrated Protection table, provided you meet the mode's prerequisite.
Image courtesy of D&D Beyond.
Nowhere in this description does it say anything about the "built-in defensive layers" counting as armor for the purposes of wearing armor, but this is heavily implied by the table's parenthetical descriptions following each mode, such as the medium mode Composite Plating (armor).
While you are wearing armor, you gain a +1 bonus to AC.
PHB p. 72, 84
and the Rage feature that barbarians receive at first level:
In battle, you fight with primal ferocity. On your turn, you can enter a rage as a bonus action.
While raging, you gain the following benefits if you aren't wearing heavy armor: [...]
PHB p. 48
Is the feature text more authoritative, not specifying the Integrated Protection as armor worn, or is the table with its parenthetical descriptions more authoritative, meaning that the second and third options count as wearing armor for the above features?