XML Information Set

Article summary

XML Information Set (XML Infoset) is a W3C specification that defines an abstract data model of an XML document in terms of a set of information items. The XML Infoset provides a standardized way to refer to the components of XML documents, serving as a foundation for XML-related standards and tools. The XML Infoset identifies eleven different types of information items, including the document, elements, attributes, Processing instructions, characters, and namespaces. Each information item has a set of named properties, which represent specific aspects of the XML document being modeled. For example, an element information item has properties such as the element's namespace name, local name, children, and attributes. An XML document has an information set if it is well-formed and satisfies the namespace constraints. There is no requirement for an XML document to be valid according to a DTD or XML Schema in order to have an information set. XML was initially developed without a formal definition of its infoset. This conceptual foundation was only formalized by later work beginning in 1999, first published as a separate W3C Working Draft at the end of December that year. The Infoset Recommendation Second Edition was adopted on February 4, 2004.…

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