An Amount, and currency, as defined in UN/CEFACT's CCTS
A code for an unespecified concept
Code identifying a country (Compulsory use of ISO 3166-1 alpha 2
Date values (format YYYY-DD-MM)
URL, namely pointing to an evidence
"true" or "false" values representing "Yes" affirmative or "No" negative answers
A decimal number representing a percent (e.g. 0.1)
Period object as defined in UBL-2.1
A number representing a quantity in a specific unit of measure. The unit has to be specified (e.g. Kg).
A non-negative integer representing a year. The unit has to be specified as YEAR
A number representing a generic quantity with no unit specified.