SCHEMA test;
ENTITY person;
name : STRING;
age : OPTIONAL INTEGER;
WHERE
EXISTS(age);
END_ENTITY;
END_SCHEMA;
SCHEMA test;
ENTITY person;
name : STRING;
age : INTEGER;
END_ENTITY;
END_SCHEMA;
| Mode | E | -T | -U | -S | -H | -R | M | X |
| HLCs extracted from first model | 2 | 2 | 2 | 2 | 0 | 2 | 2 | 5 |
| HLCs extracted from second model | 2 | 2 | 2 | 2 | 0 | 2 | 2 | 5 |
| Comparisons | 27 | 27 | 27 | 27 | 21 | 25 | 27 | 47 |
| HLC-comparisons | 2 | 2 | 2 | 2 | 0 | 1 | 2 | 12 |
| Correspondences | 7 | 7 | 7 | 7 | 5 | 6 | 7 | 9 |
| HLC-correspondences | 2 | 2 | 2 | 2 | 0 | 1 | 2 | 4 |
| Differences | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 7 |
| Number of FC-thesaurus lookups | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Number of name-thesaurus lookups | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 |
The frames generated by the CCUS (and output as HTML-ised FIL files) follow - a file for each frame-class:
HLCs: