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On the opposite, the code point U+0085 is a valid control character in Unicode and ISO/IEC 10646, as well as in XML 1.0 and XML 1.1 documents (in all contexts), and its usage is not discouraged (it is treated as whitespace in many XML contexts, or as a line-break control similar to U+000D and U+000A in preformatted texts in some XML applications).
This article lists the character entity references that are valid in HTML and XML documents. A character entity reference refers to the content of a named entity. An entity declaration is created in XML, SGML and HTML documents (before HTML5) by using the <!ENTITY name "value"> syntax in a document type definition (DTD).
XML also provides a mechanism whereby an XML processor can reliably, without any prior knowledge, determine which encoding is being used. [18] Encodings other than UTF-8 and UTF-16 are not necessarily recognized by every XML parser (and in some cases not even UTF-16, even though the standard mandates it to also be recognized).
If the XML document type declaration includes any SYSTEM identifier for the external subset, it can not be safely processed as standalone: the URI should be retrieved, otherwise there may be unknown named character entities whose definition may be needed to correctly parse the effective XML syntax in the internal subset or in the document body ...
This will not display properly in a system expecting a document encoded as UTF-8, ISO 8859-1, or CP-1252, where this code point is occupied by the letter Ò. The correct numeric character reference for " in HTML 4 and newer is “, because U+201C is its UCS code. In some systems, the named character reference “ may also be available.
A processing instruction (PI) is an SGML and XML node type, which may occur anywhere in a document, intended to carry instructions to the application. [1] [2]Processing instructions are exposed in the Document Object Model as Node.PROCESSING_INSTRUCTION_NODE, and they can be used in XPath and XQuery with the 'processing-instruction()' command.
Canonical XML specifies a number of other details, some of which are: the UTF-8 encoding is used; line-ends are represented using the newline character 0x0A; whitespace in attribute values is normalized; entity references and non-special character references are expanded; CDATA sections are replaced with their character content
[8] [9] MusicXML development was transferred to the W3C Music Notation Community Group in July 2015. [10] Version 1.0 was released in January 2004. Version 1.1 was released in May 2005 with improved formatting support. Version 2.0 was released in June 2007 and included a standard compressed format. [11]