Unknown HTML Character Entity Reference, with Custom External Subset

Note: An external subset entity referenced from this document by SYSTEM identifier declares the unknown general entity.

Test

&unknown; is rendered as
&unknown;
© is rendered as
©

The innerHTML of the list above is:



About the first dd element:






Expected Result





Conforming XHTML 1.0 User Agent


Conforming XHTML Family User Agent

	
The character reference (later) is treated as a
	COPYRIGHT SIGN.

	
A user agent that reads external entities will treat
	the entity reference (former) as a COPYRIGHT SIGN.

	
A user agent that does not read the external entity in which
	the entity declaration for the general entity unknown
	will render it as a sequence of nine characters:
	&unknown;.





Discussion



See a SuikaWiki article on entity references in XHTML documents.