Using Anchors and Refs for Bolt Contenttypes

gistfile1.yml

pages:
    name: Pages
    singular_name: Page
    field_defaults: &defaults
        title:
            type: text
            class: large
        slug:
            type: slug
            uses: title
        image:
            type: image
        teaser:
            type: html
            height: 150px
        body:
            type: html
            height: 300px
    fields:
        <<: *defaults
    taxonomy: [ chapters ]
    recordsperpage: 100
    
    
about-pages:
    name: About Pages
    singular_name: About Page
    fields:
        <<: *defaults
        extra1:
            type: html
            height: 300px
        extra2: 
            type: html
            height: 300px
    taxonomy: [ chapters ]
    recordsperpage: 100
    
detail-pages:
    name: Detail Pages
    singular_name: Detail Page
    fields:
        <<: *defaults
        extra1:
            type: html
            height: 300px
        extra2: 
            type: html
            height: 300px
        extra3:
            type: html
            height: 300px
        extra4: 
            type: html
            height: 300px
    taxonomy: [ chapters ]
    recordsperpage: 100