Post type reference.

The twenty post types

The Type is the number stored on the post. The Collection alias is the name you pass to {% collection %}. The Layout permalink is the permalink of the template the pipeline wraps the post in when the post has no layout of its own.

How the columns relate

The three columns come from two different mechanisms, and it is worth knowing which is which.

The collection alias is resolved by the {% collection %} tag: it lower-cases the source, removes a single trailing "s", and looks the result up in the type list. Because only one "s" comes off, both the singular and the simple plural resolve to the same type, so blog and blogs both mean type 2. Two names are irregular and are marked with an asterisk above:

• category (type 13): the natural plural categories does not resolve, because removing one "s" leaves categorie. Use the singular category.
• class (type 21): no bare alias reaches it, because removing the trailing "s" from class leaves clas. Query it as posts with an explicit type instead: {% collection posts, items, type: 21 %}.

The layout permalink is resolved by the pipeline from the post's numeric type through a fixed table, independent of the collection alias. It is the permalink, of the form :name, of the site template that wraps a post of that type. Because this path uses the number and not the alias, a class post (type 21) still renders through its :class layout even though its collection alias does not resolve. How that wrapping template is chosen, and how a post can override it, is covered under type-based layouts.

System types

Two further types sit above the content range and are platform internals, not content:

Both sit above the type < 100 cutoff that {% collection posts %} applies by default, so they never appear in a listing. They have no collection alias and no layout permalink, and they are not offered as plugin permission resources. Treat them as platform internals you do not query.