Spencer, I'm curious if you're coming at this from a cataloger's perspective, or from a user's.
Neither, and I think that's important, so I'm glad you asked. :) As a cataloger, I don't believe in the concept of main entry. It had its uses in the card catalog days, but we are way beyond that and in this "keyword" world, the idea of one author being named in a 100 field and another in a 700 field merely because one name appeared before another on an item (or an earlier edition of an item) is patently ridiculous. As is the limit to three named authors (LC's rule for decades) and many, many other outmoded rules/guidelines/practices. Cataloging needn't be the conservative practice it is today (in the "status quo" meaning of the word conservative, not the political meaning) when so many of our systems allow for global changes and other maintenance tasks that were impossible in earlier generations. As a user, the concept of main entry/added entry is foreign and inexact and therefore useless. That's why the label for the 700 field is so variable and vague across library systems--in some cases it is an additional (and co-equal) author, in other cases it is a secondary participant (e.g. editor, translator), etc. In my earlier post I was speaking as someone who has tried (usually with little success) to explain the treatment of this data in some OPAC to some other hapless user. The inconsistency of 700 treatment is especially bizarre in non-book formats. Take a look at the output of the search http://www.worldcat.org/search?q=au%3Aausten&fq=+dt%3Avis+%3E&qt=advanced and imagine a catalog where the first name following the "by" is in a separate column so that it stands out. How is a user supposed to make heads or tails of a list that runs Joe Wright Ang Lee Colin Firth Jane Austen etc. As a sympathetic user who might have the ear of a cataloger, I can only ask: Who *are* these people and what have you done to my catalog?!
What I have noticed, is that professionally trained catalogers view the bibliographic universe in vastly, and often incompatible ways, from the average library user. While the distinctions that catalogers make are essential for accurately recording materials, they aren't always the best as a resource for finding what the user wants.
Absolutely!
So I guess the questions is, how can we build a search tool that satisfies both worldviews :-)
I think this is next to impossible with current cataloging practices/standards. The only thing you can do is to try not to confuse the user too badly with the data available. In my experience, catalogers rarely look at the public view of things if given a choice, so let them merrily carry on, because they probably won't ever change. As for me, when given the freedom, I catalog using many, many of the options available in current standards (much use of the subfield e in author fields, mandatory use of the first indicator in the 650/653 fields to differentiate primary from secondary subject terms, etc.). I hope that whatever system I'm working in can make adequate use of the intellectual effort I put into cataloging, but I'm generally satisfied as long as the system doesn't mangle things too badly. Spencer -- Spencer M. Anspach, Library Systems Analyst/Programmer Library Information Technology, Indiana University Library E456 phone: (812) 856-5318 Bloomington, IN 47405 fax: (812) 856-4979 sanspach@indiana.edu pager: (812) 335-7403