<xs:documentation>The name of the extension.
Each standard name should document the expected measure class.
Each standard name should document the expected maximum size.
For numeric values the size should be in terms of xsd types
such as int, long, short, byte, float or double.
For strings, the maximum length should be defined in number of characters.
Local extensions to the list of standard names are allowed but it is strongly
recommended that the names and definitions be approved by the
respective SIG Technical Team before use.</xs:documentation>