Entities are also known as entity references. In simple terms, entities are a way of representing special characters. In document B, the subject is an element. In document A, the subject is an attribute. Let’s consider documents A and B given below. An element cannot contain several attributes with the same name.Īre you still confused about the difference between an attribute and an element? Here is another example.Attribute values must be within quotes.The below list shows XML attribute rules. Note: An attribute name is also known as an attribute.Īlso, note that in the above example, the company is the root element. There are two attributes in the company element, i.e. You can add more than one attribute for a single element with different attribute names. Hyphens underscore, and periods are the only punctuation marks allowed.Īttribute for an element is placed after the tag name in the start tag. A tag name can contain letters, digits, hyphens, underscores, and periods.A tag name must begin with a letter or an underscore, and it cannot start with the XML.All elements must have a closing tag (except for declarations).All XML documents must contain a single root element.Note: AGE, Age, and age are three different names in XML. įollowing list shows XML tag and element rules. If there is no content between the tags, as shown below, it referred to as empty tags. Note: Tag name also referred to as an element or element name. Note: Elements may also contain attributes. Opening tag + content + closing tag = an element Opening tag, content, and closing tag, altogether, is referred to as an element. Īnything between the opening and closing tags is referred to as content. For a particular tag pair, the start and end tags must be identical except the end tag has / after the. Every tag pair consists of an opening tag (also known as the start tag) and a closing tag (also known as the end tag). Tags work as pairs except for declarations.
#Microsoft xml editor tutorial code
Syntax for XML Commentsįollowing code segment shows the syntax for XML comments. Adding comments help to understand the document content. The XML declaration is case sensitive, and it must start with the lowercased Ĭomments are optional.If the XML declaration is present, it must be the first thing that appears.The below code segment shows the syntax for XML declaration.
XML declaration consists of the XML version, character encoding or/and standalone status. The below code segment shows the basic XML syntax. You can use encoding inside the XML declaration. It uses 16-bits to represent the characters. UTF-8 : UTF-8 uses 8-bits to represent the characters.Mainly, there are two types of UTF encoding. UTF stands for UCS ( UCS stands for Universal Character Set) Transformation Format. XML is an extensible markup language like HTML.Įncoding is the conversion of Unicode characters to their binary representation.Well-structured format is easy to read and write from programs.Mark-up code of XML is easy to understand for a human.XML was designed to carry data, not to display that data.It is platform and language independent.World Wide Web Consortium (W3C) is the developer of XML, and it became a W3C recommendation in 1998. XML started way back in 1996 and was first published in 1998. Unlike HTML tags, XML tags are self-descriptive.
XML bridges the gap between human readability and machine readability. The main goal is to transport data not to display information. XML is not for handling computational operations and algorithms. XML also uses DTDs ( Document Type Definitions) to define the XML document structure.
It is derived from Standard Generalized Markup Language(SGML). It is a language (not> a programming language) that uses the markup and can extend. XML stands for e Xtensible Markup Language.