2. The device of claim 1 further comprising means for creating linked error templates which are linked to specified reference templates, and wherein said comparison means compares test templates to said linked error templates in addition to said reference templates and independent error templates.
2. The device of claim 1 further comprising means for creating linked error templates which are linked to specified reference templates, and wherein said comparison means compares test templates to said linked error templates in addition to said reference templates and independent error templates. 3. The device of claim 2 wherein said independent error templates and said linked error templates are composite templates which correspond to a class of erroneously matched patterns.