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For example, when the identification date of a species is recorded, in the Darwin Core metadata standard the the corresponding field is </dwc<dwc:dateIdentified> and the allowed format is the ISO-8601 format, e.g. 2000-01-01.
In the ABCD standard, the same information would be represented as follows, also also using the ISO-8601 format:
<abcd:DateTime>
<abcd:ISODateTimeBegin>2000-01-01</abcd:ISODateTimeBegin>
</abcd:DateTime>
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 it may limit the number characters for the respective fields.??ADD SAME EXAMPLE IN ABCD