Digests and Annotated Codes both provide case summaries arranged by legal topics, which help researchers quickly find relevant case law.
| I | Hypothesis | a | Null |
| II | published Books | b | Tool |
| III | Schedule | c | Subject matter of research |
| IV | Applied | d | Secondary Source |
| I | Hypothesis | a | Null |
| II | published Books | b | Tool |
| III | Schedule | c | Subject matter of research |
| IV | Applied | d | Secondary Source |