Many of you already have some familiarity with XML, but perhaps mostly
as a data format for applications or programming. In Organizing Systems it is
essential to take a more abstract and intellectual view of XML and
understand how it represents structured information models for resources and for resource descriptions. XML
encourages the separation of content from presentation, which is the
most important principle of information architecture. Encoding
information in XML is an investment in information organization that
pays off "downstream" in IR and language processing applications.