How to write attributes

An attribute is composed of its name and value.

Attributes are inserted in the start tag which may be empty.

Attribute value is always in quotes or doublequotes add separated by a = from the attribute name.

For attribute names the same rules as for element names hold.

In one element, there can never be two or more attributes with same name.

If namespaces are used, neither two attributes belonging to the same namespace are allowed.