XML tags are created like HTML tags. There's a start tag and a closing tag. <TAG>content</TAG>
The closing tag uses a slash after the opening bracket, just like in HTML. The text between the brackets is called an element.
The following rules are used for using XML tags:
Tags are case sensitive. The tag <TRAVEL> differs from the tags <Travel> and <travel>
Starting tags always need a closing tag
All tags must be nested properly
Comments can be used like in HTML: <!- Comments -->
Between the starting tag and the end tag XML expects the content. <amount>135</amount> is a valid tag for an element amount that has the content 135
Besides a starting tag and a closing tag, you can use an empty tag. An empty tag does not have a closing tag.
The syntax differs from HTML: <TAG/>