Partial Data

Underscore-prefixed .json files within source/_patterns will be concatenated to the output of _data.json, the whole in turn getting built into data.json, the final source of globally scoped data.

Partial data is distinct from pattern data. For example, 01-blog.json is pattern data and specific to the 01-blog pattern. No other pattern will pick up 01-blog.json, even if 01-blog.mustache is included in another pattern. However, _01-blog.json is partial data and will get concatenated to the global data outputted to data.json. _01-blog.json will be picked up by all patterns.