Variable 1 default = old item id number: maintained for backwards compatibility. Taken from URLs formerly in the following format: http://ora-web.swkk.de/digimo_online/digimo.entry?source=digimo.Digitalisat_anzeigen&a_id=#####.
Variable 2 is only used with P in the first field for the PURL - the number found at the end of the string .../resolver?urn=urn:nbn:de:gbv:##-#-########### . Used in this fashion: {{AAB|P|##-#-###########}}
