Validating xml with dtd

11-Jan-2019 20:17

There are many other text encodings that predate Unicode, such as ASCII and ISO/IEC 8859; their character repertoires in almost every case are subsets of the Unicode character set.

XML allows the use of any of the Unicode-defined encodings, and any other encodings whose characters also appear in Unicode.

In computing, Extensible Markup Language (XML) is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable.

The W3C's XML 1.0 Specification It is a textual data format with strong support via Unicode for different human languages.

The characters between the start-tag and end-tag, if any, are the element's content, and may contain markup, including other elements, which are called child elements.

An example is , where the name of the attribute is "number" and its value is "3".

This is not an exhaustive list of all the constructs that appear in XML; it provides an introduction to the key constructs most often encountered in day-to-day use.

The processor analyzes the markup and passes structured information to an application.

The processor (as the specification calls it) is often referred to colloquially as an XML parser.It also defines the media types application/xml and text/xml, which say only that the data is in XML, and nothing about its semantics.The use of text/xml has been criticized RFC 7303 also recommends that XML-based languages be given media types ending in xml; for example image/svg xml for SVG.XML also provides a mechanism whereby an XML processor can reliably, without any prior knowledge, determine which encoding is being used.Encodings other than UTF-8 and UTF-16 are not necessarily recognized by every XML parser.

The processor (as the specification calls it) is often referred to colloquially as an XML parser.It also defines the media types application/xml and text/xml, which say only that the data is in XML, and nothing about its semantics.The use of text/xml has been criticized RFC 7303 also recommends that XML-based languages be given media types ending in xml; for example image/svg xml for SVG.XML also provides a mechanism whereby an XML processor can reliably, without any prior knowledge, determine which encoding is being used.Encodings other than UTF-8 and UTF-16 are not necessarily recognized by every XML parser.The characters making up an XML document are divided into markup and content, which may be distinguished by the application of simple syntactic rules.