“…This broad term should cover the main options of rehabilitation, namely, prevention, restoration, and maintenance. 39 According to the named goals at different levels of specificity, classes with different levels of abstraction were created. For example, the named intervention goal "improve/ keep muscle function" was assigned to the class "influence muscle function," whereas the named goal "improve/maintain strength" was assigned to the more specific class "influence muscle strength," although muscle strength may be regarded as a subcategory of muscle function.…”