Description of Process Logic
XML can express, or model, many types of data structures, including structures that are similar to relational data, hierarchical data and loosely structured data. The use of XML as a support for the databases on the mentioned company's web site to track shipment and orders is based on many factors, and the logic behind this markup language is substantial in the success of this implementation. XML is described mostly in terms of a set of rules that define how sequences of characters are to be used so that an XML processor can process an XML document without throwing errors and that also define the physical structure, expressed as entities. But XML documents also have a logical structure that is expressed by the nesting of elements and the presence of attributes on selected elements. The highly flexible document structure means that the programmer can model many types of data, resulting for modeling both highly flexible structured data that can be......
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