question: public static AttribKey forAttribute ( Namespaces inScope , ElKey el , String qname ) { Namespaces ns ; String localName ; int colon = qname . indexOf ( ':' ) ; if ( colon < 0 ) { ns = el . ns ; localName = qname ; } else { ns = inScope . forAttrName ( el . ns , qname ) ; if ( ns == null ) { return null ; } ns = inScope . forUri ( ns . uri ) ; localName = qname . substring ( colon + 1 ) ; } return new AttribKey ( el , ns , localName ) ; }
target:  Looks up an attribute key by qualified name.