XML by Example

For example, the tel element can have a preferred attribute:

<tel preferred=”true”>513-555-8889</tel>

Unlike HTML, XML insists on the quotation marks. The XML processor

would reject the following:

<tel preferred=true>513-555-8889</tel>

The quotation marks can be either single or double quotes. This is conve-

nient if you need to insert single or double quotation marks in an attribute

value.

<confidentiality level=”I don’t know”>

This document is not confidential.

</confidentiality>

or

<confidentiality level=’approved “for your eyes only”’>

This document is top-secret

</confidentiality>

Empty Element

Elements that have no content are known as empty elements ...