Bundles

Bundles are a type of container for information that holds the field or setting definitions. They are sometimes called "sub-types". Bundles are optional. In the hierarchy of container types for information they fit below entity types.

• Entity variants (content and configuration; many entities come in pairs, e.g. blocks)
  • Entity types
    • Bundles, or sub-types (optional)

Examples of those container types are as follows:

• Entity Variants:
  1. Content
     • Content Entity Types:
       1. Node
          • Node Bundles, aka Content Types:
            1. Article
            2. Basic page
       2. Taxonomy Terms
          • Taxonomy Bundles, aka Vocabularies:
            1. <Vocabulary A>
            2. <Vocabulary B>
            3. <Vocabulary Etc.>
       3. Custom Blocks
          • Custom Block Bundles, aka Custom Block Types:
            1. <Block Type L>
            2. <Block Type M>
            3. <Block Type Etc.>
       4. User (has no child bundles)
       5. <Custom content entity type X>
       6. <Custom content entity type Y>
       7. <Custom content entity type Etc.>
  2. Configuration
     • Configuration Entity Types:
       1. Custom Block types(has no child bundles?)
       2. View(has no child bundles)
       3. Menu (has no child bundles)
       4. Role (has no child bundles)
       5. <Custom config entity type I>
       6. <Custom config entity type II>
       7. <Custom config entity type Etc.>