XML Guide

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Types of XML Metadata

You can create PowerCenter XML definitions from XML, DTD, or XML schema files. XML files provide data and metadata. DTD files and XML schema files provide metadata.

PowerCenter extracts the following types of metadata from XML, DTD, and XML schema files:

Namespace.
A collection of elements and attribute names identified by a Uniform Resource Identifier (URI) reference in an XML file. Namespace differentiates between elements that come from different sources.

Name.
A tag that contains the name of an element or attribute.

Hierarchy.
The position of an element in relationship to other elements in an XML file.

Cardinality.
The number of times an element occurs in an XML file.

Datatype.
A classification of a data element, such as numeric, string, Boolean, or time. XML supports custom datatypes and inheritance.

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