IDMEF vs IODEF: (5)
7. It seems that name “datetime” is commonly used in XML world but IDMEF use “date-time” with dash.
Date-time strings are represented by the DATETIME data type. Each date-time string identifies a particular instant in time; ranges are not supported.
Date-time strings are formatted according to a subset of ISO 8601:2000, as show below. Section references in parentheses refer to sections of the ISO 8601:2000 standard.
Comment to IDWG to change to datetime.