elliptical/doc/phrases/groups.md

Interactive natural-language interfaces

# Built-in Group Phrases

## <choice>

Branches the parse tree down multiple equally-valid paths.

## <sequence>

Parses children in one-by-one in order, with some powerful features to allow
for optional children.

## <label>

A powerful phrase that serves two essential purposes:

- Improving performance and limiting choices by hiding phrases behind
  "placeholders"
- Outputting "arguments"

See "labels" for more information

## <repeat>

Allows the same phrase to be repeated multiple times, with an optional
separator in between.