Data Transformation Engine Type Tree Importers Reference Guide
Chapter 2 - Using the Importer Wizard  XML DTD Importer 
Type Tree Importers Reference Guide 
31 
but messages defined through XML Schema definitions are found in the Element 
or Type section of the type tree. 
XML DTD Importer 
The Extensible Markup Language (XML) Importer is a facility for automatically 
generating type trees that describe the format of XML data. 
See the XML Data Adapter Reference Guide for detailed information of the XML 
DTD Importer. 
XML Schema Importer 
The XML Schema Importer automatically generates type trees by parsing an XML 
schema. 
XML Schema Mapping 
The tables in this section show how XML schema elements and types are mapped 
to Mercator type trees. 
XML Schema Elements to Type Tree Element Mapping 
The following table shows how XML Schema elements are mapped to type tree 
elements. They are listed in alphabetical order by XML Schema element. 
Note: All XML Schema Elements in the following table that are marked with an * are 
indirectly supported by the external validator. 
XML Schema Element  Type Tree 
Element 
Description 
all unordered 
group 
Elements are allowed to appear 
in any order. 
 maxOccurs  component 
range 
Maximum number of 
occurrences. 
”unbounded” maps to “S” 










