classifies the Unicode characters that may validly appear in XML. Unicode code points in the following ranges are valid in XML 1.0 documents: U+0009,...

In SGML, HTML and XML documents, the logical constructs known as character data and attribute values consist of sequences of characters, in which each...

encountered in day-to-day use. Character An XML document is a string of characters. Every legal Unicode character (except Null) may appear in an (1.1) XML document...

(GML, SGML, XML, HTML). The DTD specification file can be used to validate documents. A DTD defines the valid building blocks of an XML document. It...

placed in. Like all XML schema languages, XSD can be used to express a set of rules to which an XML document must conform to be considered "valid" according...

sequence of characters that, in turn, represents a single character. Since WebSgml, XML and HTML 4, the code points of the Universal Character Set (UCS)...

backslash must be escaped). XML values are strings of characters, with no built-in type safety. XML has the concept of schema, that permits strong typing...

be parsed with or without reference to it. Tag-validity was introduced in SGML (ENR+WWW) to support XML which allows documents with no DOCTYPE declaration...

XML namespaces are used for providing uniquely named elements and attributes in an XML document. They are defined in a W3C recommendation. An XML instance...

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...