Spines

A spine in Rheo is the backbone or ‘table of contents’ of Typst source files that should be compiled to an output format. It takes its name from the epub specification, in which the spine articulates—or reticulates— the set and order of chapters included.

You can specify a spine’s vertebrae for any output format using an array of glob strings in rheo.toml:

[epub.spine]
title = "My epub"
vertebrae = ["intro.typ", "*.typ"]

Notice how the first entry intro.typ is a specific file, whereas the second *.typ captures a range of files. When a glob string captures a range of source files, they will be ordered lexicographically in the spine.

Each format uses its spine slightly differently. See the PDF, HTML, and EPUB format pages for details on how spines are configured and what defaults are applied for each output.