Mobile Manifest Entity
These definitions represent Factions in the game. Factions have ended up unilaterally being related to Vendors that represent them, but that need not necessarily be the case.

A Faction is really just an entity that has a related progression for which a character can gain experience. In Destiny 1, Dead Orbit was an example of a Faction: there happens to be a Vendor that represents Dead Orbit (and indeed, DestinyVendorDefinition.factionHash defines to this relationship), but Dead Orbit could theoretically exist without the Vendor that provides rewards.
Mapped to Mobile Manifest Table: Factions
Type: object
Object Properties
Mapped to Definition
The hash identifier for the DestinyProgressionDefinition that indicates the character's relationship with this faction in terms of experience and levels.
Type: uint32
Mapped to Manifest Database Definition: Destiny.Definitions.DestinyProgressionDefinition
The faction token item hashes, and their respective progression values.
Type: object
Dictionary Contents: uint32
Dictionary Key Type: uint32
Mapped to Definition
The faction reward item hash, usually an engram.
Type: uint32
Mapped to Manifest Database Definition: Destiny.Definitions.DestinyInventoryItemDefinition
Mapped to Definition
The faction reward vendor hash, used for faction engram previews.
Type: uint32
Mapped to Manifest Database Definition: Destiny.Definitions.DestinyVendorDefinition
List of vendors that are associated with this faction. The last vendor that passes the unlock flag checks is the one that should be shown.
Type: array
The unique identifier for this entity. Guaranteed to be unique for the type of entity, but not globally.

When entities refer to each other in Destiny content, it is this hash that they are referring to.
Type: uint32
The index of the entity as it was found in the investment tables.
Type: int32
If this is true, then there is an entity with this identifier/type combination, but BNet is not yet allowed to show it. Sorry!
Type: boolean