Open-ended learning benefits immensely from the use of symbolic methods for goal representation as they offer ways to structure knowledge for efficient and transferable learning. However, the existing Hierarchical Reinforcement Learning (HRL) approaches relying on symbolic reasoning are often limited as they require a manual goal representation. The challenge in autonomously discovering a symbolic goal representation is that it must preserve critical information, such as the environment dynamics. In this work, we propose a developmental mechanism for subgoal discovery via an emergent representation that abstracts (i.e., groups together) sets of environment states that have similar roles in the task. We create a HRL algorithm that gradually learns this representation along with the policies and evaluate it on navigation tasks to show the learned representation is interpretable and results in data efficiency.

通过自动发现类似任务中具有相似角色的环境状态集合的新兴表示法，我们提出了一种基于发展机制的子目标发现方法，该方法能够逐渐学习这种表示法，并且通过导航任务的评估表明学习到的表示法是可解释的，并且可以实现数据效率。

通过可达性分析在层次化强化学习中的目标空间抽象