Section: User Contributed Perl Documentation (3)
Text::BibTeX::BibSort - generate sort keys for bibliographic entries
# Assuming $entry comes from a database of the 'Bib' structure
# (i.e., that it's blessed into the BibEntry class, which inherits
# the sort_key method from BibSort):
$sort_key = $entry->sort_key;
is a base class of "Text::BibTeX::BibEntry"
for generating sort keys from bibliography entries. It could in
principle (and, someday, might) offer a wide range of highly
customizable sort-key generators. Currently, though, it provides only a
single method ("sort_key"
) for public use, and that method only pays
attention to one structure option, "sortby"
- sort_key ()
Generates a sort key for a single bibliographic entry. Assumes this
entry conforms to the "Bib" database structure. The nature of this
sort key is controlled by the "sortby" option, which can be either
"name" or "year". (The "namestyle" also has a role, in
determining how author/editor names are formatted for inclusion in the
For by-name sorting (which is how BibTeX's standard styles work), the sort
key consists of one of the "author", "editor", "organization", or "key"
fields (depending on the entry type and which fields are actually present),
followed by the year and the title. All fields are drastically simplified
to produce the sort key: non-English letters are mercilessly anglicized,
non-alphabetic characters are stripped, and everything is forced to
lowercase. (The first two steps are done by the "purify_string" routine;
see ``Generic string-processing functions'' in Text::BibTeX for a brief
description, and the description of the C function "bt_purify_string()" in
bt_misc for all the gory details.)
Greg Ward <firstname.lastname@example.org
Copyright (c) 1997-2000 by Gregory P. Ward. All rights reserved. This file
is part of the Text::BibTeX library. This library is free software; you
may redistribute it and/or modify it under the same terms as Perl itself.