The "Classification
Mark-up Language (ClaML)" is an XML based format designed specifically for
classifications. It was accepted in 2007 as European norm (CEN/TS 14463).
Additional details on the specification and use can be found in the respective
CEN document (www.cen.eu). WHO decided to use
this format to share its classifications such as the ICD.
This format allows us
to capture
·
information on the classification hierarchy (i.e. parent child relations)
·
A level of granularity that allows identifying different rubrics within the
classification categories. (Title, includes, excludes, definitions, coder
instructions, etc. are separated from each other)
·
Cross references
The main XML elements
used in this format are the following:
·
The main element (root element) is
"ClaML" for the definition of the classification as such.
·
The element "Class" is used for the
definition and structuring of the chapters, groups and categories. The classes
define their parent and children classes by using
"SuperClass" and "SubClass"
elements so that the hierarchical representation is captured.
·
Each "Class" may have one or more
"Rubric"s which are used to define
different aspects of that class. For example, title, inclusions, exclusions are
separate Rubrics under a "Class" element.
·
A "Reference" tag can be used to
identify the cross references within the classification.
·
The element "ModifierClass" and
"Modifier" are used for the
definition and integration of subclassifications (Modifiers), in the ICD-10 as
list of codes for the fourth and possible fifth character of the codes.