[PATCH v2] alphapf.bst: Make use of 'location' field in 'inproceedings' entry

[Akira Yokosawa <akiyks@gmail.com>]

From a7c875d0ef8a995a3c119caeb11e576094f89865 Mon Sep 17 00:00:00 2001
From: Akira Yokosawa <akiyks@gmail.com>
Date: Sun, 29 Jan 2017 00:57:29 +0900
Subject: [PATCH v2] alphapf.bst: Make use of 'location' field in 'inproceedings' entry

In early "inproceedings" entries, "address" fields are used to
indicate the location of conferences as is described in BibTeX
documentation[1].

However, in recent entries such as those copied from e.g. ACM
BibTeX templates, "address" fields are used for publisher's
addresses. In such entries, "location" fields are used instead
to show where those events were held.

The circumstances of how to handle locations of conferences in
bibliography databases are far from being settled within LaTeX
community[2][3].

This commit therefore adds awareness of "location" field in
alphapf.bst for "inproceedings" entry, and lets the field have
a higher precedence than an "address" field if both fields are
present. It has no effect on other types of entries or 
"inproceedings" entries with "address" field only.

This change can be thought of as a compromise to improve the
consistency presented in Bibliography in a non-intrusive way.

This commit also adds comment in the header describing changes made
for perfbook.

  [1] Excerpt of BibTeX documentation (shown by "texinfo bibtex"):

    10. The PROCEEDINGS and INPROCEEDINGS entry types now use the
        address field to tell where a conference was held, rather
        than to give the address of the publisher or organization.
        If you want to include the publisher's or organization's
        address, put it in the publisher or organization field.

  [2] "How to show the location of a conference in BibTeX":
      http://tex.stackexchange.com/questions/76566/

  [3] "Abuse of address field in BibTeX entries":
      http://tex.stackexchange.com/questions/152725/

Note: It is easier to see the diff with white-space changes ignored.

Signed-off-by: Akira Yokosawa <akiyks@gmail.com>
---
Hi Paul,

I rewrote the log message to reflect the questions and answers regarding
the first attempt. I hope you would find this one easier to apply than v1.
I also replaced hard tabs slipped in v1 with spaces.

                                              Thanks, Akira

 alphapf.bst | 47 +++++++++++++++++++++++++++++++++--------------
 1 file changed, 33 insertions(+), 14 deletions(-)

diff --git a/alphapf.bst b/alphapf.bst
index 6a9ec4d..47b28ea 100644
--- a/alphapf.bst
+++ b/alphapf.bst
@@ -6,6 +6,15 @@
 %%% Added DOI support.
 %%% Added PUBMED support.
 %%% Added hyperref support.
+%%%
+%%% Also modified by Akira Yokosawa <akiyks@gmail.com> for perfbook.
+%%% (marked with "% ay")
+%%% Brought date field of unpublished entry in front of note field.
+%%% (In perfbook, note field is mostly used for URL info.)
+%%% Added support of location field in inproceedings entry.
+%%% If "location" is available, it is used instead of "address".
+%%% Copyright (C) 2016, 2017 Akira Yokosawa.
+%%%
 %%% Original headers follow...

 % BibTeX standard bibliography style `alpha'
@@ -46,6 +55,7 @@ ENTRY
     pubmed % urlbst
     url % urlbst
     lastchecked % urlbst
+    location %ay
   }
   {}
   { label extra.label sort.label }
@@ -1022,19 +1032,28 @@ FUNCTION {inproceedings}
       format.bvolume output
       format.number.series output
       format.pages output
-      address empty$
-        { organization publisher new.sentence.checkb
-          organization output
-          publisher output
-          format.date "year" output.check
-        }
-        { address output.nonnull
-          format.date "year" output.check
-          new.sentence
-          organization output
-          publisher output
-        }
-      if$
+      location empty$        %ay
+        { address empty$     %ay
+          { organization publisher new.sentence.checkb
+            organization output
+            publisher output
+            format.date "year" output.check
+          }
+            { address output.nonnull
+              format.date "year" output.check
+              new.sentence
+              organization output
+              publisher output
+            }
+          if$
+        }                                 % ay
+        { location output.nonnull         % ay
+          format.date "year" output.check % ay
+          new.sentence                    % ay
+          organization output             % ay
+          publisher output                % ay
+        }                                 % ay
+      if$                                 % ay
     }
     { format.incoll.inproc.crossref output.nonnull
       format.pages output
@@ -1187,7 +1206,7 @@ FUNCTION {unpublished}
   new.block
   title empty$ 'skip$ 'possibly.setup.inlinelink if$ % urlbst
   format.title "title" output.check
-  format.date output
+  format.date output        % ay
   new.block
   note "note" output.check
   fin.entry
-- 
2.7.4