If the specified named block is located, it is inserted at the current position. The required attribute ID specifies the name of the block. If the block is not found, nothing happens (this is, however, recorded as an HTML comment in the entry for debugging purposes). This is an empty tag, so it should be used with a trailing slash: <REF ID="Sinclair ZX81;myblock"/>.
You cannot refer to other named blocks inside named blocks. This is done to increase rendering speed (each named block reference is one database lookup) and avoid circular references.
ATTRIBUTES
Empty CONTENT DECLARATION
Top Elements
All Elements
General Entities
Tree