Summary of XML Document Markups
XML documents are composed of markup and content. Six kinds of markup can occur in an XML document: elements, attributes, comments, marked sections, entity references, and document type declarations. The following sections introduce each of these markup concepts. All the markups are case-sensitive; that means, for example, the tag <FirstName> is different from <firstname>.
Building Elements
Elements are the building blocks of an XML document. The content of an element is surrounded by a start tag and an end tag. Some elements may be empty; in which case, they have no content. If an element is not empty, it begins with the start tag, <element>, and ends with the end tag, </element>. An empty element, however, is ...
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