Template for Consecutive Custom Field

Hi,

I have been able to put together a working citation style for Hebrew. However, one of the common features for Hebrew bibliography is to transliterate an author's name after its first use, thus if one cited a book written by "Magid" the next footnote would transliterate it to מגיד. For this purpose I have used the Custom Field 1, so that I retain both the English and Hebrew transliteration. Many Hebrew journals still use idem/eadem (and the Hebrew equivalent כנ"ל), however, I have not figured out how to make a template that would recognize that if a consecutive references are used that have the same author, but have now been changed to reflect the transliteration to show up as idem if a new English reference is used .

Likewise, how to set a template that would change the Hebrew references to show as כנ"ל (The Hebrew equivalent of idem).

In the attached example, I have placed consecutive references to different articles written by Elliot R. Wolfson, however, as some appeared earlier in the document they have been transliterated to be וולפסון, but in theory the correct citation would be for it:

וולפסון (לעיל, הערה 2); idem, ‘The Body in the Text: A Kabbalistic Theory of Embodiment’, The Jewish Quarterly Review, 95 (2005); כנ"ל (לעיל, הערה 2); כנ"ל (לעיל, הערה 2).

For Hebrew references I have been able to have it automatically become כנ"ל since they all retain the author component in the style, as no transliteration is required.

Thank you for any and all help