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# Introduction

Introduction -- Introduction to XML_RDDL

## Introduction to XML_RDDL

XML_RDDL is a class that allows the extraction of RDDL resources from an XML document.

The Resource Directory Description Language is an extension of XHTML Basic 1.0 with an added element named resource. This element serves as an XLink to the referenced resource, and contains a human-readable description of the resource and machine readable links which describe the purpose of the link and the nature of the resource being linked to. The nature of the resource being linked to is indicated by the xlink:role attribute and the purpose of the link is indicated by the xlink:arcrole attribute.

For more information on RDDL, visit the RDDL website.

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