What are the delimiters for HTML tags?

HTML tags are delimited by angle brackets. A standard HTML tag consists of an opening tag, such as <tagname>, and a closing tag, which is the same name preceded by a forward slash, like </tagname>. Some tags, known as self-closing tags, do not require a closing tag and are written as <tagname />. Attributes within the opening tag are separated by spaces and defined with key-value pairs.