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. 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. ![]()
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