| prolog:called_by/2 | (hook) Extend cross-referencer |
| xref_built_in/1 | Examine defined built-ins |
| xref_called/3 | Examine called predicates |
| xref_clean/1 | Remove analysis of source |
| xref_current_source/1 | Examine cross-referenced sources |
| xref_defined/3 | Examine defined predicates |
| xref_exported/2 | Examine exported predicates |
| xref_module/2 | Module defined by source |
| xref_source/1 | Cross-reference analysis of source |