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LDH labelAlso Known AsLetter, Digit, HyphenLDHLDH ruleOriginAn acronym that describes the pool of ASCII characters from which labels can be composed. This pool includes: <ul><li>Letters A to Z from the English alphabet (no distinction is made between uppercase and lowercase letters)</li> <li>Digits 0 to 9</li> <li>Hyphens</li></ul>Related Term