Utilities for Agents and Groups (collectively known as Actors).

Paths of the form `["property" '* ...]`, which are used to navigate
xAPI Statements.

Functions include getting the appropriate spec for the path at the
location, as well as determining the valid objectTypes allowed at
the location.

Note that this namespace is used both during Profile compilation and
Statement generation.

Profile compilation.

Creates a `profile-map` data structure that is used for the simulation
of an entire Profile cosmos.

Creation of `activity-map` for Profile compilation.

Creation of `extension-spec-map` for Profile compilation.

Pattern map compilation and walking. This is where the magic of
profile simulation happens.

Creation of `statement-base-map` and `parsed-rules-map` for Profile
compilation.

Creation of `verb-map` for Profile compilation.

Statement Template rules. Contains functions to parse rules, apply them to
Statements, and validate Statements against rules.

Note that this namespace is used during both Profile compilation and
Statement generation.

Statement generation.

Statement healing, i.e. the repair of Statements that are missing
required properties.