Anchors that have nested anchors, such as

Group

, have nested phases. For example, if a

Group

anchor runs in the main phase of a Parser, a

Marker

anchor that is nested in the

Group

runs in a nested initial phase. The nested initial phase is part of the Parser main phase, but it is before the other anchors in the

Group

.

Another example is a

RepeatingGroup

anchor, which searches for both separators and for nested anchors. In order to identify the nested anchors correctly, it searches for the separators before it searches for the nested anchors.