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Formal Language:
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| NumericString4(numeric string4) |
| appearance as argument number 1 |
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| (subclass NumericString4 DecimalDigitString) | Media.kif 2900-2900 | Numeric string4 is a subclass of decimal digit string |
| appearance as argument number 2 |
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| (termFormat EnglishLanguage NumericString4 "numeric string4") | domainEnglishFormat.kif 65256-65256 |
| antecedent |
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| (=> (instance ?STRING NumericString4) (stringLength 4 ?STRING)) |
Media.kif 2902-2904 | If X is an instance of numeric string4, then X is 4 characters long |
| consequent |
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| (=> (and (instance ?STRING DecimalDigitString) (stringLength 4 ?STRING)) (instance ?STRING NumericString4)) |
Media.kif 2906-2910 | If X is an instance of decimal digit string and X is 4 characters long, then X is an instance of numeric string4 |
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