XML Information Set

XML Information Set (XML Infoset) is a W3C specification describing an abstract data model of an XML document in terms of a set of information items. The definitions in the XML Information Set specification are meant to be used in other specifications that need to refer to the information in a well-formed XML document.

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 in order to have an information set.

An information set can contain up to eleven different types of information items:

  1. The Document Information Item (always present)
  2. Element Information Items
  3. Attribute Information Items
  4. Processing Instruction Information Items
  5. Unexpanded Entity Reference Information Items
  6. Character Information Items
  7. Comment Information Items
  8. The Document Type Declaration Information Item
  9. Unparsed Entity Information Items
  10. Notation Information Items
  11. Namespace Information Items

Infoset recommendation Second Edition was adopted on February 4, 2004.

Read more about XML Information Set:  Infoset Augmentation

Famous quotes containing the words information and/or set:

    The information links are like nerves that pervade and help to animate the human organism. The sensors and monitors are analogous to the human senses that put us in touch with the world. Data bases correspond to memory; the information processors perform the function of human reasoning and comprehension. Once the postmodern infrastructure is reasonably integrated, it will greatly exceed human intelligence in reach, acuity, capacity, and precision.
    Albert Borgman, U.S. educator, author. Crossing the Postmodern Divide, ch. 4, University of Chicago Press (1992)

    What is love itself,
    Even though it be the lightest of light love,
    But dreams that hurry from beyond the world
    To make low laughter more than meat and drink,
    Though it but set us sighing?
    William Butler Yeats (1865–1939)