Labels have simple syntax. They are key/value pairs where both the key and value are represented by strings. Label keys can be broken down into two parts: an optional prefix and a name, separated by a slash. The prefix, if specified, must be a DNS subdomain with a 253-character limit. The key name is required and must be shorter than 63 characters. Names must also start and end with an alphanumeric character and permit the use of dashes (-), underscores (_), and dots (.) between characters. Label values are strings with a maximum length of 63 characters. The contents of the label values follow
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