tugboat (6sep18)

git-svn-id: svn://tug.org/texlive/trunk@48607 c570f23f-e606-0410-a88d-b1316a301751

1 files changed, 1514 insertions, 0 deletions

diff --git a/Master/texmf-dist/bibtex/bst/tugboat/tugboat.bst b/Master/texmf-dist/bibtex/bst/tugboat/tugboat.bst
new file mode 100644
index 00000000000..a99d7a479b1
--- /dev/null
+++ b/Master/texmf-dist/bibtex/bst/tugboat/tugboat.bst
@@ -0,0 +1,1514 @@
+%%% $Id: tugboat.bst 205 2018-09-06 17:28:53Z karl $
+%%% Modified for TUGboat from abbrurl.bst:
+%%%   abbreviate "page(s)" to "p(p).",
+%%%     "volume" to "vol.",
+%%%     "editor(s)" to "ed(s)".
+%%%   urlintro=""
+%%%   reduce long author lists in format.names per Mico.
+%%% TUGboat changes public domain.
+%%% --karl, originally created 24jul18.
+%%% 
+%%% Modification of BibTeX style file /usr/local/texlive/2009/texmf-dist/bibtex/bst/base/abbrv.bst
+%%% ... by urlbst, version 0.7 (marked with "% urlbst")
+%%% See <http://purl.org/nxg/dist/urlbst>
+%%% Added webpage entry type, and url and lastchecked fields.
+%%% Added eprint support.
+%%% Added DOI support.
+%%% Added PUBMED support.
+%%% Added hyperref support.
+%%% Original headers follow...
+
+% BibTeX standard bibliography style `abbrv'
+        % version 0.99a for BibTeX versions 0.99a or later, LaTeX version 2.09.
+        % Copyright (C) 1985, all rights reserved.
+        % Copying of this file is authorized only if either
+        % (1) you make absolutely no changes to your copy, including name, or
+        % (2) if you do make changes, you name it something other than
+        % btxbst.doc, plain.bst, unsrt.bst, alpha.bst, and abbrv.bst.
+        % This restriction helps ensure that all standard styles are identical.
+        % The file btxbst.doc has the documentation for this style.
+
+ENTRY
+  { address
+    author
+    booktitle
+    chapter
+    edition
+    editor
+    howpublished
+    institution
+    journal
+    key
+    month
+    note
+    number
+    organization
+    pages
+    publisher
+    school
+    series
+    title
+    type
+    volume
+    year
+    eprint % urlbst
+    doi % urlbst
+    pubmed % urlbst
+    url % urlbst
+    lastchecked % urlbst
+    newpage % tub
+    urlnewline % tub
+  }
+  {}
+  { label }
+
+INTEGERS { output.state before.all mid.sentence after.sentence after.block }
+
+% urlbst...
+% urlbst constants and state variables
+STRINGS { urlintro
+  eprinturl eprintprefix doiprefix doiurl pubmedprefix pubmedurl
+  citedstring onlinestring linktextstring
+  openinlinelink closeinlinelink }
+INTEGERS { hrefform inlinelinks makeinlinelink
+  addeprints adddoiresolver addpubmedresolver }
+FUNCTION {init.urlbst.variables}
+{
+  % The following constants may be adjusted by hand, if desired
+
+  % The first set allow you to enable or disable certain functionality.
+  #0 'addeprints :=         % 0=no eprints; 1=include eprints
+  #1 'adddoiresolver :=     % 0=no DOI resolver; 1=include it
+  #1 'addpubmedresolver :=     % 0=no PUBMED resolver; 1=include it
+  #2 'hrefform :=           % 0=no crossrefs; 1=hypertex xrefs; 2=hyperref refs
+  #0 'inlinelinks :=        % 0=URLs explicit; 1=URLs attached to titles
+
+  % String constants, which you _might_ want to tweak.
+  "" 'urlintro := % prefix before URL; typically "Available from:" or "URL":
+  "online" 'onlinestring := % indication that resource is online; typically "online"
+  "cited " 'citedstring := % indicator of citation date; typically "cited "
+  "[link]" 'linktextstring := % dummy link text; typically "[link]"
+  "http://arxiv.org/abs/" 'eprinturl := % prefix to make URL from eprint ref
+  "arXiv:" 'eprintprefix := % text prefix printed before eprint ref; typically "arXiv:"
+  "http://dx.doi.org/" 'doiurl := % prefix to make URL from DOI
+  "doi:" 'doiprefix :=      % text prefix printed before DOI ref; typically "doi:"
+  "http://www.ncbi.nlm.nih.gov/pubmed/" 'pubmedurl := % prefix to make URL from PUBMED
+  "PMID:" 'pubmedprefix :=      % text prefix printed before PUBMED ref; typically "PMID:"
+
+  % The following are internal state variables, not configuration constants,
+  % so they shouldn't be fiddled with.
+  #0 'makeinlinelink :=     % state variable managed by possibly.setup.inlinelink
+  "" 'openinlinelink :=     % ditto
+  "" 'closeinlinelink :=    % ditto
+}
+INTEGERS { 
+  bracket.state
+  outside.brackets
+  open.brackets
+  within.brackets
+  close.brackets
+}
+% ...urlbst to here
+
+% tub: move up to use earlier.
+FUNCTION {not}
+{   { #0 }
+    { #1 }
+  if$
+}
+
+FUNCTION {and}
+{   'skip$
+    { pop$ #0 }
+  if$
+}
+
+FUNCTION {or}
+{   { pop$ #1 }
+    'skip$
+  if$
+}
+
+FUNCTION {init.state.consts}
+{ #0 'outside.brackets := % urlbst...
+  #1 'open.brackets :=
+  #2 'within.brackets :=
+  #3 'close.brackets := % ...urlbst to here
+
+  #0 'before.all :=
+  #1 'mid.sentence :=
+  #2 'after.sentence :=
+  #3 'after.block :=
+}
+
+STRINGS { s t last.output.check }
+
+% urlbst
+% arg on stack is what needs to be written.
+% If a journal, we want to omit the following comma, as in
+% "TUGboat 39(1)" instead of the default "TUGboat, 39(1)".
+% 
+FUNCTION {output.nonnull.original}
+{ 's :=
+  output.state mid.sentence =
+    { last.output.check "journal" = not
+        { ", " * }
+        {  " " *}
+      if$
+      write$
+    }
+    { output.state after.block =
+        { add.period$ write$
+          newline$
+          "\newblock " write$
+        }
+        { output.state before.all =
+            'write$
+            { add.period$ " " * write$ }
+          if$
+        }
+      if$
+      mid.sentence 'output.state :=
+    }
+  if$
+  s
+}
+
+% urlbst...
+% The following three functions are for handling inlinelink.  They wrap
+% a block of text which is potentially output with write$ by multiple
+% other functions, so we don't know the content a priori.
+% They communicate between each other using the variables makeinlinelink
+% (which is true if a link should be made), and closeinlinelink (which holds
+% the string which should close any current link.  They can be called
+% at any time, but start.inlinelink will be a no-op unless something has
+% previously set makeinlinelink true, and the two ...end.inlinelink functions
+% will only do their stuff if start.inlinelink has previously set
+% closeinlinelink to be non-empty.
+% (thanks to 'ijvm' for suggested code here)
+FUNCTION {uand}
+{ 'skip$ { pop$ #0 } if$ } % 'and' (which isn't defined at this point in the file)
+FUNCTION {possibly.setup.inlinelink}
+{ makeinlinelink hrefform #0 > uand
+    { doi empty$ adddoiresolver uand
+        { pubmed empty$ addpubmedresolver uand
+            { eprint empty$ addeprints uand
+                { url empty$
+                    { "" }
+                    { url }
+                  if$ }
+                { eprinturl eprint * }
+              if$ }
+            { pubmedurl pubmed * }
+          if$ }
+        { doiurl doi * }
+      if$
+      % an appropriately-formatted URL is now on the stack
+      hrefform #1 = % hypertex
+        { "\special {html:<a href=" quote$ * swap$ * quote$ * "> }{" * 'openinlinelink :=
+          "\special {html:</a>}" 'closeinlinelink := }
+        { "\newline\href {" swap$ * "} {" * 'openinlinelink := % hrefform=#2 -- hyperref
+          % the space between "} {" matters: a URL of just the right length can cause "\% newline em"
+          "}" 'closeinlinelink := }
+      if$
+      #0 'makeinlinelink :=
+      }
+    'skip$
+  if$ % makeinlinelink
+}
+FUNCTION {add.inlinelink}
+{ openinlinelink empty$
+    'skip$
+    { openinlinelink swap$ * closeinlinelink *
+      "" 'openinlinelink :=
+      }
+  if$
+}
+FUNCTION {output.nonnull}
+{ % Save the thing we've been asked to output
+  's :=
+  % If the bracket-state is close.brackets, then add a close-bracket to
+  % what is currently at the top of the stack, and set bracket.state
+  % to outside.brackets
+  bracket.state close.brackets =
+    { "]" *
+      outside.brackets 'bracket.state :=
+    }
+    'skip$
+  if$
+  bracket.state outside.brackets =
+    { % We're outside all brackets -- this is the normal situation.
+      % Write out what's currently at the top of the stack, using the
+      % original output.nonnull function.
+      s
+      add.inlinelink
+      output.nonnull.original % invoke the original output.nonnull
+    }
+    { % Still in brackets.  Add open-bracket or (continuation) comma, add the
+      % new text (in s) to the top of the stack, and move to the close-brackets
+      % state, ready for next time (unless inbrackets resets it).  If we come
+      % into this branch, then output.state is carefully undisturbed.
+      bracket.state open.brackets =
+        { " [" * }
+        { ", " * } % bracket.state will be within.brackets
+      if$ 
+      s * 
+      close.brackets 'bracket.state :=
+    }
+  if$
+}
+
+% Call this function just before adding something which should be presented in 
+% brackets.  bracket.state is handled specially within output.nonnull.
+FUNCTION {inbrackets}
+{ bracket.state close.brackets =
+    { within.brackets 'bracket.state := } % reset the state: not open nor closed
+    { open.brackets 'bracket.state := }
+  if$
+}
+
+FUNCTION {format.lastchecked}
+{ lastchecked empty$
+    { "" }
+    { inbrackets citedstring lastchecked * }
+  if$
+}
+% ...urlbst to here
+
+FUNCTION {output}
+{ duplicate$ empty$
+    'pop$
+    'output.nonnull
+  if$
+}
+
+% tub: save name of field (what's on stack, e.g., "journal") in
+% variable last.output.check for use in output.nonnull.original.
+FUNCTION {output.check}
+{ 't :=
+  duplicate$ empty$
+    { pop$ "empty " t * " in " * cite$ * warning$ }
+    { t 'last.output.check := 
+      output.nonnull }
+  if$
+}
+
+FUNCTION {output.bibitem.original} % urlbst (renamed from output.bibitem, so it can be wrapped below)
+{ newline$
+  "\bibitem{" write$
+  cite$ write$
+  "}" write$
+  newline$
+  ""
+  before.all 'output.state :=
+}
+
+FUNCTION {fin.entry.original} % urlbst (renamed from fin.entry, so it can be wrapped below)
+{ doi empty$  url empty$  and
+    { add.period$ }
+    { skip$ }
+  if$
+  write$
+  newline$
+}
+
+
+FUNCTION {new.block}
+{ output.state before.all =
+    'skip$
+    { after.block 'output.state := }
+  if$
+}
+
+FUNCTION {new.sentence}
+{ output.state after.block =
+    'skip$
+    { output.state before.all =
+        'skip$
+        { after.sentence 'output.state := }
+      if$
+    }
+  if$
+}
+
+FUNCTION {new.block.checka}
+{ empty$
+    'skip$
+    'new.block
+  if$
+}
+
+FUNCTION {new.block.checkb}
+{ empty$
+  swap$ empty$
+  and
+    'skip$
+    'new.block
+  if$
+}
+
+FUNCTION {new.sentence.checka}
+{ empty$
+    'skip$
+    'new.sentence
+  if$
+}
+
+FUNCTION {new.sentence.checkb}
+{ empty$
+  swap$ empty$
+  and
+    'skip$
+    'new.sentence
+  if$
+}
+
+FUNCTION {field.or.null}
+{ duplicate$ empty$
+    { pop$ "" }
+    'skip$
+  if$
+}
+
+FUNCTION {emphasize}
+{ duplicate$ empty$
+    { pop$ "" }
+    { "{\em " swap$ * "}" * }
+  if$
+}
+
+INTEGERS { nameptr namesleft numnames }
+
+FUNCTION {format.names}
+{ 's :=
+  #1 'nameptr :=
+  s num.names$ 'numnames :=
+  numnames 'namesleft :=
+    { namesleft #0 > }
+    { s nameptr "{f.~}{vv~}{ll}{, jj}" format.name$ 't :=
+      nameptr #1 >
+        % following lines implement printing only 2 author names (+ "et al.")
+        % whenever there are more than 4 authors. Thanks Mico.
+        % https://tex.stackexchange.com/questions/26575
+        { nameptr #2
+          #1 + =
+          numnames #3
+          > and
+            { "others" 't :=
+              #1 'namesleft := }
+            'skip$
+          if$
+          namesleft #1 >
+            { ", " * t * }
+            { numnames #2 >
+                { "," * }
+                'skip$
+              if$
+              t "others" =
+                { " et~al." * }
+                { " and " * t * }
+              if$
+            }
+          if$
+        }
+        't
+      if$
+      nameptr #1 + 'nameptr :=
+      namesleft #1 - 'namesleft :=
+    }
+  while$
+}
+
+FUNCTION {format.authors}
+{ author empty$
+    { "" }
+    { author format.names }
+  if$
+}
+
+FUNCTION {format.editors}
+{ editor empty$
+    { "" }
+    { editor format.names
+      editor num.names$ #1 >
+        { ", eds." * }
+        { ", ed." * }
+      if$
+    }
+  if$
+}
+
+FUNCTION {format.title}
+{ title empty$
+    { "" }
+    { title "t" change.case$ }
+  if$
+}
+
+FUNCTION {n.dashify}
+{ 't :=
+  ""
+    { t empty$ not }
+    { t #1 #1 substring$ "-" =
+        { t #1 #2 substring$ "--" = not
+            { "--" *
+              t #2 global.max$ substring$ 't :=
+            }
+            {   { t #1 #1 substring$ "-" = }
+                { "-" *
+                  t #2 global.max$ substring$ 't :=
+                }
+              while$
+            }
+          if$
+        }
+        { t #1 #1 substring$ *
+          t #2 global.max$ substring$ 't :=
+        }
+      if$
+    }
+  while$
+}
+
+FUNCTION {format.date}
+{ year empty$
+    { month empty$
+        { "" }
+        { "there's a month but no year in " cite$ * warning$
+          month
+        }
+      if$
+    }
+    { month empty$
+        'year
+        { month " " * year * }
+      if$
+    }
+  if$
+}
+
+FUNCTION {format.btitle}
+{ title emphasize
+}
+
+FUNCTION {tie.or.space.connect}
+{ duplicate$ text.length$ #3 <
+    { "~" }
+    { " " }
+  if$
+  swap$ * *
+}
+
+FUNCTION {either.or.check}
+{ empty$
+    'pop$
+    { "can't use both " swap$ * " fields in " * cite$ * warning$ }
+  if$
+}
+
+FUNCTION {format.bvolume}
+{ volume empty$
+    { "" }
+    { "vol." volume tie.or.space.connect
+      series empty$
+        'skip$
+        { " of " * series emphasize * }
+      if$
+      "volume and number" number either.or.check
+    }
+  if$
+}
+
+FUNCTION {format.number.series}
+{ volume empty$
+    { number empty$
+        { series field.or.null }
+        { output.state mid.sentence =
+            { "number" }
+            { "Number" }
+          if$
+          number tie.or.space.connect
+          series empty$
+            { "there's a number but no series in " cite$ * warning$ }
+            { " in " * series * }
+          if$
+        }
+      if$
+    }
+    { "" }
+  if$
+}
+
+FUNCTION {format.edition}
+{ edition empty$
+    { "" }
+    { output.state mid.sentence =
+        { edition "l" change.case$ " edition" * }
+        { edition "t" change.case$ " edition" * }
+      if$
+    }
+  if$
+}
+
+INTEGERS { multiresult }
+
+FUNCTION {multi.page.check}
+{ 't :=
+  #0 'multiresult :=
+    { multiresult not
+      t empty$ not
+      and
+    }
+    { t #1 #1 substring$
+      duplicate$ "-" =
+      swap$ duplicate$ "," =
+      swap$ "+" =
+      or or
+        { #1 'multiresult := }
+        { t #2 global.max$ substring$ 't := }
+      if$
+    }
+  while$
+  multiresult
+}
+
+FUNCTION {format.pages}
+{ pages empty$
+    { "" }
+    { pages multi.page.check
+        { "pp." pages n.dashify tie.or.space.connect }
+        { "p." pages tie.or.space.connect }
+      if$
+    }
+  if$
+}
+
+FUNCTION {format.vol.num.pages}
+{ volume field.or.null
+  number empty$
+    'skip$
+    { "(" number * ")" * *
+      volume empty$
+        { "there's a number but no volume in " cite$ * warning$ }
+        'skip$
+      if$
+    }
+  if$
+  pages empty$
+    'skip$
+    { duplicate$ empty$
+        { pop$ format.pages }
+        { ":" * pages n.dashify * }
+      if$
+    }
+  if$
+}
+
+FUNCTION {format.chapter.pages}
+{ chapter empty$
+    'format.pages
+    { type empty$
+        { "chapter" }
+        { type "l" change.case$ }
+      if$
+      chapter tie.or.space.connect
+      pages empty$
+        'skip$
+        { ", " * format.pages * }
+      if$
+    }
+  if$
+}
+
+FUNCTION {format.in.ed.booktitle}
+{ booktitle empty$
+    { "" }
+    { editor empty$
+        { "In " booktitle emphasize * }
+        { "In " format.editors * ", " * booktitle emphasize * }
+      if$
+    }
+  if$
+}
+
+FUNCTION {empty.misc.check}
+{ author empty$ title empty$ howpublished empty$
+  month empty$ year empty$ note empty$
+  and and and and and
+  key empty$ not and
+    { "all relevant fields are empty in " cite$ * warning$ }
+    'skip$
+  if$
+}
+
+FUNCTION {format.thesis.type}
+{ type empty$
+    'skip$
+    { pop$
+      type "t" change.case$
+    }
+  if$
+}
+
+FUNCTION {format.tr.number}
+{ type empty$
+    { "Technical Report" }
+    'type
+  if$
+  number empty$
+    { "t" change.case$ }
+    { number tie.or.space.connect }
+  if$
+}
+
+FUNCTION {format.article.crossref}
+{ key empty$
+    { journal empty$
+        { "need key or journal for " cite$ * " to crossref " * crossref *
+          warning$
+          ""
+        }
+        { "In {\em " journal * "\/}" * }
+      if$
+    }
+    { "In " key * }
+  if$
+  " \cite{" * crossref * "}" *
+}
+
+FUNCTION {format.crossref.editor}
+{ editor #1 "{vv~}{ll}" format.name$
+  editor num.names$ duplicate$
+  #2 >
+    { pop$ " et~al." * }
+    { #2 <
+        'skip$
+        { editor #2 "{ff }{vv }{ll}{ jj}" format.name$ "others" =
+            { " et~al." * }
+            { " and " * editor #2 "{vv~}{ll}" format.name$ * }
+          if$
+        }
+      if$
+    }
+  if$
+}
+
+FUNCTION {format.book.crossref}
+{ volume empty$
+    { "empty volume in " cite$ * "'s crossref of " * crossref * warning$
+      "In "
+    }
+    { "Volume" volume tie.or.space.connect
+      " of " *
+    }
+  if$
+  editor empty$
+  editor field.or.null author field.or.null =
+  or
+    { key empty$
+        { series empty$
+            { "need editor, key, or series for " cite$ * " to crossref " *
+              crossref * warning$
+              "" *
+            }
+            { "{\em " * series * "\/}" * }
+          if$
+        }
+        { key * }
+      if$
+    }
+    { format.crossref.editor * }
+  if$
+  " \cite{" * crossref * "}" *
+}
+
+FUNCTION {format.incoll.inproc.crossref}
+{ editor empty$
+  editor field.or.null author field.or.null =
+  or
+    { key empty$
+        { booktitle empty$
+            { "need editor, key, or booktitle for " cite$ * " to crossref " *
+              crossref * warning$
+              ""
+            }
+            { "In {\em " booktitle * "\/}" * }
+          if$
+        }
+        { "In " key * }
+      if$
+    }
+    { "In " format.crossref.editor * }
+  if$
+  " \cite{" * crossref * "}" *
+}
+
+% urlbst...
+% Functions for making hypertext links.
+% In all cases, the stack has (link-text href-url)
+%
+% make 'null' specials
+FUNCTION {make.href.null}
+{
+  pop$
+}
+% make hypertex specials
+FUNCTION {make.href.hypertex}
+{ 
+  "\special {html:<a href=" quote$ *
+  swap$ * quote$ * "> }" * swap$ *
+  "\special {html:</a>}" *
+}
+% make hyperref specials
+FUNCTION {make.href.hyperref}
+{ 
+  "\newline\href {" swap$ * "} {\path{" * swap$ * "}}" *
+}
+FUNCTION {make.href}
+{ hrefform #2 =
+    'make.href.hyperref      % hrefform = 2
+    { hrefform #1 =
+        'make.href.hypertex  % hrefform = 1
+        'make.href.null      % hrefform = 0 (or anything else)
+      if$
+    }
+  if$
+}
+
+% If inlinelinks is true, then format.url should be a no-op, since it's
+% (a) redundant, and (b) could end up as a link-within-a-link.
+% Likewise if the url is empty.
+% Likewise if doi is present, on the assumption that
+% url most likely redundantly specifies the same info as those fields; this
+% seems to be what people do in practice.
+FUNCTION {format.url}
+{ inlinelinks #1 =  url empty$  or
+  doi empty$ not or
+  howpublished empty$ not or
+   { "" }
+   { hrefform #1 =
+       { % special case -- add HyperTeX specials
+         urlintro "\url{" url * "}" * url make.href.hypertex * }
+       { urlintro "\url{" * url * "}" * }
+     if$
+   }
+  if$
+}
+
+FUNCTION {format.eprint}
+{ eprint empty$
+    { "" }
+    { eprintprefix eprint * eprinturl eprint * make.href }
+  if$
+}
+
+FUNCTION {format.doi}
+{ doi empty$
+    { "" }
+    { doiprefix doi * doiurl doi * make.href }
+  if$
+}
+
+FUNCTION {format.pubmed}
+{ pubmed empty$
+    { "" }
+    { pubmedprefix pubmed * pubmedurl pubmed * make.href }
+  if$
+}
+
+% Output a URL.  We can't use the more normal idiom (something like
+% `format.url output'), because the `inbrackets' within
+% format.lastchecked applies to everything between calls to `output',
+% so that `format.url format.lastchecked * output' ends up with both
+% the URL and the lastchecked in brackets.
+% 
+% If the `urlnewline' field is present, output \newline before the
+% url value.
+FUNCTION {output.url}
+{ url empty$
+    'skip$ 
+    { new.block 
+      format.url output
+      urlnewline empty$ not
+        { "\newline " write$ }
+        'skip$
+      if$
+      format.lastchecked output 
+    }
+  if$
+}
+
+FUNCTION {output.web.refs}
+{
+  new.block
+  inlinelinks
+    'skip$ % links were inline -- don't repeat them
+    {
+      output.url
+      addeprints eprint empty$ not and
+        { format.eprint output.nonnull }
+        'skip$
+      if$
+      adddoiresolver doi empty$ not and
+        { format.doi output.nonnull }
+        'skip$
+      if$
+      addpubmedresolver pubmed empty$ not and
+        { format.pubmed output.nonnull }
+        'skip$
+      if$
+    }
+  if$
+}
+
+% Wrapper for output.bibitem.original.
+% If the URL field is not empty, set makeinlinelink to be true,
+% so that an inline link will be started at the next opportunity
+FUNCTION {output.bibitem}
+{ outside.brackets 'bracket.state :=
+  output.bibitem.original
+  inlinelinks url empty$ not doi empty$ not or pubmed empty$ not or eprint empty$ not or and
+    { #1 'makeinlinelink := }
+    { #0 'makeinlinelink := }
+  if$
+}
+
+% Wrapper for fin.entry.original
+FUNCTION {fin.entry}
+{ output.web.refs  % urlbst
+  makeinlinelink       % ooops, it appears we didn't have a title for inlinelink
+    { possibly.setup.inlinelink % add some artificial link text here, as a fallback
+      linktextstring output.nonnull }
+    'skip$
+  if$
+  bracket.state close.brackets = % urlbst
+    { "]" * }
+    'skip$	
+  if$
+  fin.entry.original
+  newpage empty$ not
+    { "\newpage " write$ }
+    'skip$
+  if$
+}
+
+% Webpage entry type.
+% Title and url fields required;
+% author, note, year, month, and lastchecked fields optional
+% See references 
+%   ISO 690-2 http://www.nlc-bnc.ca/iso/tc46sc9/standard/690-2e.htm
+%   http://www.classroom.net/classroom/CitingNetResources.html
+%   http://neal.ctstateu.edu/history/cite.html
+%   http://www.cas.usf.edu/english/walker/mla.html
+% for citation formats for web pages.
+FUNCTION {webpage}
+{ output.bibitem
+  author empty$
+    { editor empty$
+        'skip$  % author and editor both optional
+        { format.editors output.nonnull }
+      if$
+    }
+    { editor empty$
+        { format.authors output.nonnull }
+        { "can't use both author and editor fields in " cite$ * warning$ }
+      if$
+    }
+  if$
+  new.block
+  title empty$ 'skip$ 'possibly.setup.inlinelink if$
+  format.title "title" output.check
+  inbrackets onlinestring output
+  new.block
+  year empty$
+    'skip$
+    { format.date "year" output.check }
+  if$
+  % We don't need to output the URL details ('lastchecked' and 'url'),
+  % because fin.entry does that for us, using output.web.refs.  The only
+  % reason we would want to put them here is if we were to decide that
+  % they should go in front of the rather miscellaneous information in 'note'.
+  new.block
+  note output
+  fin.entry
+}
+% ...urlbst to here
+
+
+FUNCTION {article}
+{ output.bibitem
+  format.authors "author" output.check
+  new.block
+  title empty$ 'skip$ 'possibly.setup.inlinelink if$ % urlbst
+  format.title "title" output.check
+  new.block
+  crossref missing$
+    { journal emphasize "journal" output.check
+      possibly.setup.inlinelink format.vol.num.pages output% urlbst
+      format.date "year" output.check
+    }
+    { format.article.crossref output.nonnull
+      format.pages output
+    }
+  if$
+  new.block
+  note output
+  fin.entry
+}
+
+FUNCTION {book}
+{ output.bibitem
+  author empty$
+    { format.editors "author and editor" output.check }
+    { format.authors output.nonnull
+      crossref missing$
+        { "author and editor" editor either.or.check }
+        'skip$
+      if$
+    }
+  if$
+  new.block
+  title empty$ 'skip$ 'possibly.setup.inlinelink if$ % urlbst
+  format.btitle "title" output.check
+  crossref missing$
+    { format.bvolume output
+      new.block
+      format.number.series output
+      new.sentence
+      publisher "publisher" output.check
+      address output
+    }
+    { new.block
+      format.book.crossref output.nonnull
+    }
+  if$
+  format.edition output
+  format.date "year" output.check
+  new.block
+  note output
+  fin.entry
+}
+
+FUNCTION {booklet}
+{ output.bibitem
+  format.authors output
+  new.block
+  title empty$ 'skip$ 'possibly.setup.inlinelink if$ % urlbst
+  format.title "title" output.check
+  howpublished address new.block.checkb
+  howpublished output
+  address output
+  format.date output
+  new.block
+  note output
+  fin.entry
+}
+
+FUNCTION {inbook}
+{ output.bibitem
+  author empty$
+    { format.editors "author and editor" output.check }
+    { format.authors output.nonnull
+      crossref missing$
+        { "author and editor" editor either.or.check }
+        'skip$
+      if$
+    }
+  if$
+  new.block
+  title empty$ 'skip$ 'possibly.setup.inlinelink if$ % urlbst
+  format.btitle "title" output.check
+  crossref missing$
+    { format.bvolume output
+      format.chapter.pages "chapter and pages" output.check
+      new.block
+      format.number.series output
+      new.sentence
+      publisher "publisher" output.check
+      address output
+    }
+    { format.chapter.pages "chapter and pages" output.check
+      new.block
+      format.book.crossref output.nonnull
+    }
+  if$
+  format.edition output
+  format.date "year" output.check
+  new.block
+  note output
+  fin.entry
+}
+
+FUNCTION {incollection}
+{ output.bibitem
+  format.authors "author" output.check
+  new.block
+  title empty$ 'skip$ 'possibly.setup.inlinelink if$ % urlbst
+  format.title "title" output.check
+  new.block
+  crossref missing$
+    { format.in.ed.booktitle "booktitle" output.check
+      format.bvolume output
+      format.number.series output
+      format.chapter.pages output
+      new.sentence
+      publisher "publisher" output.check
+      address output
+      format.edition output
+      format.date "year" output.check
+    }
+    { format.incoll.inproc.crossref output.nonnull
+      format.chapter.pages output
+    }
+  if$
+  new.block
+  note output
+  fin.entry
+}
+
+FUNCTION {inproceedings}
+{ output.bibitem
+  format.authors "author" output.check
+  new.block
+  title empty$ 'skip$ 'possibly.setup.inlinelink if$ % urlbst
+  format.title "title" output.check
+  new.block
+  crossref missing$
+    { format.in.ed.booktitle "booktitle" output.check
+      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$
+    }
+    { format.incoll.inproc.crossref output.nonnull
+      format.pages output
+    }
+  if$
+  new.block
+  note output
+  fin.entry
+}
+
+FUNCTION {conference} { inproceedings }
+
+FUNCTION {manual}
+{ output.bibitem
+  author empty$
+    { organization empty$
+        'skip$
+        { organization output.nonnull
+          address output
+        }
+      if$
+    }
+    { format.authors output.nonnull }
+  if$
+  new.block
+  title empty$ 'skip$ 'possibly.setup.inlinelink if$ % urlbst
+  format.btitle "title" output.check
+  author empty$
+    { organization empty$
+        { address new.block.checka
+          address output
+        }
+        'skip$
+      if$
+    }
+    { organization address new.block.checkb
+      organization output
+      address output
+    }
+  if$
+  format.edition output
+  format.date output
+  new.block
+  note output
+  fin.entry
+}
+
+FUNCTION {mastersthesis}
+{ output.bibitem
+  format.authors "author" output.check
+  new.block
+  title empty$ 'skip$ 'possibly.setup.inlinelink if$ % urlbst
+  format.title "title" output.check
+  new.block
+  "Master's thesis" format.thesis.type output.nonnull
+  school "school" output.check
+  address output
+  format.date "year" output.check
+  new.block
+  note output
+  fin.entry
+}
+
+FUNCTION {misc}
+{ output.bibitem
+  format.authors output
+  title howpublished new.block.checkb
+  title empty$ 'skip$ 'possibly.setup.inlinelink if$ % urlbst
+  format.title output
+  howpublished new.block.checka
+  howpublished output
+  format.date output
+  new.block
+  note output
+  fin.entry
+  empty.misc.check
+}
+
+FUNCTION {online}
+{ misc }
+
+FUNCTION {phdthesis}
+{ output.bibitem
+  format.authors "author" output.check
+  new.block
+  title empty$ 'skip$ 'possibly.setup.inlinelink if$ % urlbst
+  format.btitle "title" output.check
+  new.block
+  "PhD thesis" format.thesis.type output.nonnull
+  school "school" output.check
+  address output
+  format.date "year" output.check
+  new.block
+  note output
+  fin.entry
+}
+
+FUNCTION {proceedings}
+{ output.bibitem
+  editor empty$
+    { organization output }
+    { format.editors output.nonnull }
+  if$
+  new.block
+  title empty$ 'skip$ 'possibly.setup.inlinelink if$ % urlbst
+  format.btitle "title" output.check
+  format.bvolume output
+  format.number.series output
+  address empty$
+    { editor empty$
+        { publisher new.sentence.checka }
+        { organization publisher new.sentence.checkb
+          organization output
+        }
+      if$
+      publisher output
+      format.date "year" output.check
+    }
+    { address output.nonnull
+      format.date "year" output.check
+      new.sentence
+      editor empty$
+        'skip$
+        { organization output }
+      if$
+      publisher output
+    }
+  if$
+  new.block
+  note output
+  fin.entry
+}
+
+FUNCTION {techreport}
+{ output.bibitem
+  format.authors "author" output.check
+  new.block
+  title empty$ 'skip$ 'possibly.setup.inlinelink if$ % urlbst
+  format.title "title" output.check
+  new.block
+  format.tr.number output.nonnull
+  institution "institution" output.check
+  address output
+  format.date "year" output.check
+  new.block
+  note output
+  fin.entry
+}
+
+FUNCTION {unpublished}
+{ output.bibitem
+  format.authors "author" output.check
+  new.block
+  title empty$ 'skip$ 'possibly.setup.inlinelink if$ % urlbst
+  format.title "title" output.check
+  new.block
+  note "note" output.check
+  format.date output
+  fin.entry
+}
+
+FUNCTION {default.type} { misc }
+
+MACRO {jan} {"Jan."}
+
+MACRO {feb} {"Feb."}
+
+MACRO {mar} {"Mar."}
+
+MACRO {apr} {"Apr."}
+
+MACRO {may} {"May"}
+
+MACRO {jun} {"June"}
+
+MACRO {jul} {"July"}
+
+MACRO {aug} {"Aug."}
+
+MACRO {sep} {"Sept."}
+
+MACRO {oct} {"Oct."}
+
+MACRO {nov} {"Nov."}
+
+MACRO {dec} {"Dec."}
+
+MACRO {acmcs} {"ACM Comput. Surv."}
+
+MACRO {acta} {"Acta Inf."}
+
+MACRO {cacm} {"Commun. ACM"}
+
+MACRO {ibmjrd} {"IBM J. Res. Dev."}
+
+MACRO {ibmsj} {"IBM Syst.~J."}
+
+MACRO {ieeese} {"IEEE Trans. Softw. Eng."}
+
+MACRO {ieeetc} {"IEEE Trans. Comput."}
+
+MACRO {ieeetcad}
+ {"IEEE Trans. Comput.-Aided Design Integrated Circuits"}
+
+MACRO {ipl} {"Inf. Process. Lett."}
+
+MACRO {jacm} {"J.~ACM"}
+
+MACRO {jcss} {"J.~Comput. Syst. Sci."}
+
+MACRO {scp} {"Sci. Comput. Programming"}
+
+MACRO {sicomp} {"SIAM J. Comput."}
+
+MACRO {tocs} {"ACM Trans. Comput. Syst."}
+
+MACRO {tods} {"ACM Trans. Database Syst."}
+
+MACRO {tog} {"ACM Trans. Gr."}
+
+MACRO {toms} {"ACM Trans. Math. Softw."}
+
+MACRO {toois} {"ACM Trans. Office Inf. Syst."}
+
+MACRO {toplas} {"ACM Trans. Prog. Lang. Syst."}
+
+MACRO {tcs} {"Theoretical Comput. Sci."}
+
+READ
+
+FUNCTION {sortify}
+{ purify$
+  "l" change.case$
+}
+
+INTEGERS { len }
+
+FUNCTION {chop.word}
+{ 's :=
+  'len :=
+  s #1 len substring$ =
+    { s len #1 + global.max$ substring$ }
+    's
+  if$
+}
+
+FUNCTION {sort.format.names}
+{ 's :=
+  #1 'nameptr :=
+  ""
+  s num.names$ 'numnames :=
+  numnames 'namesleft :=
+    { namesleft #0 > }
+    { nameptr #1 >
+        { "   " * }
+        'skip$
+      if$
+      s nameptr "{vv{ } }{ll{ }}{  f{ }}{  jj{ }}" format.name$ 't :=
+      nameptr numnames = t "others" = and
+        { "et al" * }
+        { t sortify * }
+      if$
+      nameptr #1 + 'nameptr :=
+      namesleft #1 - 'namesleft :=
+    }
+  while$
+}
+
+FUNCTION {sort.format.title}
+{ 't :=
+  "A " #2
+    "An " #3
+      "The " #4 t chop.word
+    chop.word
+  chop.word
+  sortify
+  #1 global.max$ substring$
+}
+
+FUNCTION {author.sort}
+{ author empty$
+    { key empty$
+        { "to sort, need author or key in " cite$ * warning$
+          ""
+        }
+        { key sortify }
+      if$
+    }
+    { author sort.format.names }
+  if$
+}
+
+FUNCTION {author.editor.sort}
+{ author empty$
+    { editor empty$
+        { key empty$
+            { "to sort, need author, editor, or key in " cite$ * warning$
+              ""
+            }
+            { key sortify }
+          if$
+        }
+        { editor sort.format.names }
+      if$
+    }
+    { author sort.format.names }
+  if$
+}
+
+FUNCTION {author.organization.sort}
+{ author empty$
+    { organization empty$
+        { key empty$
+            { "to sort, need author, organization, or key in " cite$ * warning$
+              ""
+            }
+            { key sortify }
+          if$
+        }
+        { "The " #4 organization chop.word sortify }
+      if$
+    }
+    { author sort.format.names }
+  if$
+}
+
+FUNCTION {editor.organization.sort}
+{ editor empty$
+    { organization empty$
+        { key empty$
+            { "to sort, need editor, organization, or key in " cite$ * warning$
+              ""
+            }
+            { key sortify }
+          if$
+        }
+        { "The " #4 organization chop.word sortify }
+      if$
+    }
+    { editor sort.format.names }
+  if$
+}
+
+FUNCTION {presort}
+{ type$ "book" =
+  type$ "inbook" =
+  or
+    'author.editor.sort
+    { type$ "proceedings" =
+        'editor.organization.sort
+        { type$ "manual" =
+            'author.organization.sort
+            'author.sort
+          if$
+        }
+      if$
+    }
+  if$
+  "    "
+  *
+  year field.or.null sortify
+  *
+  "    "
+  *
+  title field.or.null
+  sort.format.title
+  *
+  #1 entry.max$ substring$
+  'sort.key$ :=
+}
+
+ITERATE {presort}
+
+SORT
+
+STRINGS { longest.label }
+
+INTEGERS { number.label longest.label.width }
+
+FUNCTION {initialize.longest.label}
+{ "" 'longest.label :=
+  #1 'number.label :=
+  #0 'longest.label.width :=
+}
+
+FUNCTION {longest.label.pass}
+{ number.label int.to.str$ 'label :=
+  number.label #1 + 'number.label :=
+  label width$ longest.label.width >
+    { label 'longest.label :=
+      label width$ 'longest.label.width :=
+    }
+    'skip$
+  if$
+}
+
+EXECUTE {initialize.longest.label}
+
+ITERATE {longest.label.pass}
+
+FUNCTION {begin.bib}
+{ preamble$ empty$
+    'skip$
+    { preamble$ write$ newline$ }
+  if$
+  "\begin{thebibliography}{"  longest.label  * "}" * write$ newline$
+}
+
+EXECUTE {begin.bib}
+
+EXECUTE {init.urlbst.variables} % urlbst
+EXECUTE {init.state.consts}
+
+ITERATE {call.type$}
+
+FUNCTION {end.bib}
+{ newline$
+  "\end{thebibliography}" write$ newline$
+}
+
+EXECUTE {end.bib}