[libcroco-list] How to distinguish shorthand property from others?

[Kang Jeong-Hee <Keizi mail co kr>]

http://www.w3.org/TR/1998/REC-CSS2-19980512/about.html#shorthand
describe that shorthand property is all-at-once property.

How to distinguish shorthand property from others of detail?
CRDeclaration don't have a field about this character of property.
Does this mean that user of libcroco/parser have to code
handle shorthand property and other details?

http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSStyleDeclaration
define that ::getPropertyCSSValue() return null
if the property is shorthand one.

Regard,
kz.