<br><br><div class="gmail_quote">2009/7/15 Library Guy <span dir="ltr"><<a href="mailto:library.guy.zero@gmail.com">library.guy.zero@gmail.com</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
What is the reasoning/advantage for assigning both a biblionumber and<br>
a biblioitemnumber? In my test database they are always identical.<br>
Would there ever be an example where they would differ, and if not,<br>
why the duplication?<br>
<br>
James<br>
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</blockquote></div><br>In the past, it was actually a three-level hierarchy; each biblio had multiple biblioitems, which in turn had multiple items. Nowadays, biblio and biblioitems perform much the same function, but the split remains. (There was a proposal to merge the two tables, but I'm not sure what's happening with that.) <br clear="all">
<br>Note that biblionumber and biblioitemnumber are _usually_ equal, but it's not safe for the code to assume so. There are situations where they get out of sync.<br><br>-- <br>Jesse Weaver<br>