See the suggested readings below for more information. RDF is built on XML, which makes use of tags to structure information. The first thing after the open angle bracket is the tag name . The whole tag is often referred to by this name. A tag ends with a closing angle bracket.
Some tags are start tags , and have matching end tags .
From an opening tag to its matching closing tag is an element . Other tags can be embedded inside the element, but all such embedded elements must be closed inside the enclosing element. An alternate way to specify an element that has nothing between its opening and its closing is to use a single tag with a slash immediately before the closing angle-bracket. These things after the tag name are attributes . Attributes are read as properties of the element in which they appear.