The original citation is a bibItem element that describes refers to the document itself. Capture the original citation information in the first bibItem element, even where multiple different citation references are provided.
citeGrp/bibItem[1]
This element is used to indicate the original citation.
Capture the title specified in the headnote in the title attribute of the original citation. Note that the title in the headnote does not necessarily match that of the instrument.
Capture the original citation reference or references in the idnumber attribute of a bibItem.
Take the original citation date from the first available date in the list provided.
An example capture of the original citation in the first bibItem within citeGrp.