<Attribute name="attributeName" [tag="*" valuePatterns="" source=”*” type=”URL|DHTML|DJS”]/>
where,
attributeName is the name of the attribute (mandatory)
tag is the tag to which the attribute belongs (optional, default * , meaning any tag)
valuePatterns See Using Pattern Matching in Rules.
source specifies the URI of the page in which this attribute is defined ( optional, default * , meaning in any page)
type specifies the type of the value (optional). They can be:
URL - a simple URL (default value).
DHMTL - DHTML content. This kind of content is seen in standard HTML content and is used in Microsoft’s HTC format files.
DJS - JavaScript content. All HTML event handlers such as onClick and onMouseover have JavaScript inlined with the HTML attribute.