Tags

A tag is text contained within angle brackets (<...>).

The following table lists the rules that must be followed when creating tags in an XML document.

Rule

Description

Tags must exist in pairs.

A start tag must have an end tag. A tag is considered an end tag if it contains a forward slash (/) between the left angle bracket and the tag name. For example, if <a> is the start tag, then </a> is the end tag.

Tag names must be identical.

The start tag name and the end tag name must be identical. For example, if <a> is the start tag, then </a> must be the end tag name. </A> cannot be the end tag name.

Tags should not overlap.

Tags can be nested. For example:
    <a>
        <b>content</b>
    </a>

However, tags cannot overlap. For example, the following is not permitted:
    <a>
        <b>content</a>
    </b>

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