Please refer to the errata for this document, which may include some normative corrections.
The English version of this specification is the only normative version. In particular, erratum [E09] relaxes the restrictions on element and attribute names, thereby providing in XML 1.0 the major end user benefit currently achievable only by using XML 1.1.
However, for translations of this document, see Technology? As a consequence, many possible documents which were not well-formed according to previous editions of this specification are now well-formed, and previously invalid documents using the newly-allowed name characters in, for example, ID attributes, are now valid.
XML documents are made up of storage units called entities, which contain either parsed or unparsed data.
Parsed data is made up of characters, some of which form character data, and some of which form markup.
This enhances the functionality and interoperability of the Web.