39 lines
1.1 KiB
Markdown
39 lines
1.1 KiB
Markdown
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## SYNTAX03: There must be no double hyphen ('--') in position 3 and 4 of the domain name
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### Test case identifier
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**SYNTAX02** No double hyphen ('--') in position 3 and 4 of the domain name
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### Objective
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There must be no double hyphen ('--') in position 3 and 4 of the domain name,
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unless the domain name has the prefix 'xn--' which is used for
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internationalization.
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See section 5 of [RFC 3696](https://datatracker.ietf.org/doc/html/rfc3696#section-5),
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"Implications of internationalization".
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### Inputs
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The domain name to be tested.
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### Ordered description of steps to be taken to execute the test case
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1. Each label of the domain name of the test object is used as the input
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for the validation.
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2. If any label in the domain name contains hyphens ('-') in position 3 and 4,
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go to next step.
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3. Unless the prefix is 'xn', this test case fails.
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### Outcome(s)
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If any label in the domain name has a hyphen in position 3 and 4 of the label
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and the prefix is not 'xn', this test case fails.
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### Special procedural requirements
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None.
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### Intercase dependencies
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None.
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