With the default minOccurs and maxOccurs attribute values (both equal to 1), only one of the elements in a set of choices can appear.
If the value of the maxOccurs attribute is greater than 1, that value determines how many of the choices may appear.
A set of choices can also contain nested sequences, additional choice sets, or references to named groups.
A set of choices may be contained in a complex type definition, in sequences, in other sets of choices, or in named group definitions.
File: Schema.xsd
elementFormDefault="qualified">
File: Data.xml
Russia