Why some packages has no jars?

[Dudu]

Why a few maven directories has no jars, one of it is the directory of
Metadata for Webservices (jsr181) finalized and leaded by Bea?
ftp://ibiblio.org/pub/packages/maven2/javax/jws/jsr181/1.0I need to put
manually? or it has another name?
thanks