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For example, when the identification date of a species is recorded, in the Darwin Core metadata standard the corresponding field is </dwc:dateIdentified> and the allowed format is the ISO-8601 format, e.g. 2000-01-01. Therefore, a metadata standard specifies exactly how the metadata has to be recorded, including which information, which formal type (numbers, text, format) and how many characters may be entered in the respective fields.
??ADD SAME EXAMPLE IN ABCD