The Name-Value pairs are referred to as the attribute specifications of the element.
In HTML, they are characteristics or descriptions for the content in the element.
<termdef id="dt-dog" term="dog">
This Xml start tag defines:
- for the attribute name “id” the attribute value “dt-dog”
- for the attribute name “term” the attribute value “dog”
HTML Specification: The attribute value can remain unquoted if it doesn't contain space characters or any of “ ' ` = < or >. Otherwise, it has to be quoted using either single or double quotes. The value, along with the ”=“ character, can be omitted altogether if the value is the empty string.
<!-- empty attributes --> <input name=address disabled> <input name=address disabled=""> <!-- attributes with a value --> <input name=address maxlength=200> <input name=address maxlength='200'> <input name=address maxlength="200">
All the attributes of an element are called the attribute list.
The list of supported attribute for an element can be defined in the attribute-list declaration
An Attribute-list declaration is a declaration that specify the list of possible attribute for an element.
See attribute-list declaration for an example.