Taxonomy
A considerable number of types described in the standard has a predefined, fixed set of values.
The set of values may be expressed both in the xsd-scheme itself with the help of <xsd:restriction>
and in the external sources (reference guides) which are called Coding schemes in the standard.
Coding schemes - is a set of xml-files in the Genericode format. All types of the standards
for which the relevant file exists enumerating various values derived from the Scheme type. Each type has
the relevant attribute which indicates the URI of the schema defining the set of values. For most types,
this attribute has the default value.
Apart from the types with the pre-defined sets of values there are types for which only restrictions are defined for the format and range of values. For such types, rules must be published which the values must satisfy.
Below is the table showing the correlation of the types used in the standard and their reference guides and formatting rules. You can
also download all schemes as a single archive.