labels

User-supplied key-value pairs used to organize HL7v2 stores. Label keys must be between 1 and 63 characters long, have a UTF-8 encoding of maximum 128 bytes, and must conform to the following PCRE regular expression: \p{Ll}\p{Lo}{0,62} Label values are optional, must be between 1 and 63 characters long, have a UTF-8 encoding of maximum 128 bytes, and must conform to the following PCRE regular expression: \p{Ll}\p{Lo}\p{N}_-{0,63} No more than 64 labels can be associated with a given store.