Page bundles
Introduction
A page bundle is a directory that encapsulates both content and associated resources.
By way of example, this site has an “about” page and a “privacy” page:
content/
├── about/
│   ├── index.md
│   └── welcome.jpg
└── privacy.md
The “about” page is a page bundle. It logically associates a resource with content by bundling them together. Resources within a page bundle are page resources, accessible with the Resources method on the Page object.
Page bundles are either leaf bundles or branch bundles.
- leaf bundle
 - A leaf bundle is a directory that contains an index.md file and zero or more resources. Analogous to a physical leaf, a leaf bundle is at the end of a branch. It has no descendants.
 - branch bundle
 - A branch bundle is a directory that contains an _index.md file and zero or more resources. Analogous to a physical branch, a branch bundle may have descendants including leaf bundles and other branch bundles. Top level directories with or without _index.md files are also branch bundles. This includes the home page.
 
Comparison
Page bundle characteristics vary by bundle type.
| Leaf bundle | Branch bundle | |
|---|---|---|
| Index file | index.md | _index.md | 
| Example | content/about/index.md | content/posts/_index.md | 
| Page kinds | page | 
home, section, taxonomy, or term | 
| Layout type | single | list | 
| Descendant pages | None | Zero or more | 
| Resource location | Adjacent to the index file or in a nested subdirectory | Same as a leaf bundles, but excludes descendant bundles | 
| Resource types | page, image, video, etc. | 
all but page | 
Files with resource type page include content written in Markdown, HTML, AsciiDoc, Pandoc, reStructuredText, and Emacs Org Mode. In a leaf bundle, excluding the index file, these files are only accessible as page resources. In a branch bundle, these files are only accessible as content pages.
Leaf bundles
A leaf bundle is a directory that contains an index.md file and zero or more resources. Analogous to a physical leaf, a leaf bundle is at the end of a branch. It has no descendants.
content/
├── about
│   └── index.md
├── posts
│   ├── my-post
│   │   ├── content-1.md
│   │   ├── content-2.md
│   │   ├── image-1.jpg
│   │   ├── image-2.png
│   │   └── index.md
│   └── my-other-post
│       └── index.md
└── another-section
    ├── foo.md
    └── not-a-leaf-bundle
        ├── bar.md
        └── another-leaf-bundle
            └── index.md
There are four leaf bundles in the example above:
- about
 - This leaf bundle does not contain any page resources.
 - my-post
 - This leaf bundle contains an index file, two resources of resource type 
page, and two resources of resource typeimage. 
- 
content-1, content-2
These are resources of resource type
page, accessible via theResourcesmethod on thePageobject. Hugo will not render these as individual pages. - 
image-1, image-2
These are resources of resource type
image, accessible via theResourcesmethod on thePageobject 
- my-other-post
 - This leaf bundle does not contain any page resources.
 - another-leaf-bundle
 - This leaf bundle does not contain any page resources.
 
Branch bundles
A branch bundle is a directory that contains an _index.md file and zero or more resources. Analogous to a physical branch, a branch bundle may have descendants including leaf bundles and other branch bundles. Top level directories with or without _index.md files are also branch bundles. This includes the home page.
content/
├── branch-bundle-1/
│   ├── _index.md
│   ├── content-1.md
│   ├── content-2.md
│   ├── image-1.jpg
│   └── image-2.png
├── branch-bundle-2/
│   ├── a-leaf-bundle/
│   │   └── index.md
│   └── _index.md
└── _index.md
There are three branch bundles in the example above:
- home page
 - This branch bundle contains an index file, two descendant branch bundles, and no resources.
 - branch-bundle-1
 - This branch bundle contains an index file, two resources of resource type 
page, and two resources of resource typeimage. - branch-bundle-2
 - This branch bundle contains an index file and a leaf bundle.
 
Headless bundles
Use build options in front matter to create an unpublished leaf or branch bundle whose content and resources you can include in other pages.