This code system http://hl7.org/fhir/guide-page-kind defines the following codes:

LvlCodeDisplayDefinition
1pagePageThis is a page of content that is included in the implementation guide. It has no particular function.
1exampleExampleThis is a page that represents a human readable rendering of an example.
1listListThis is a page that represents a list of resources of one or more types.
1includeIncludeThis is a page showing where an included guide is injected.
1directoryDirectoryThis is a page that lists the resources of a given type, and also creates pages for all the listed types as other pages in the section.
2  dictionaryDictionaryThis is a page that creates the listed resources as a dictionary.
1tocTable Of ContentsThis is a generated page that contains the table of contents.
1resourceResourceThis is a page that represents a presented resource. This is typically used for generated conformance resource presentations.