# Instructions for *ACL Proceedings

First Author
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Second Author
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email@domain

###### Abstract

This document is a supplement to the general instructions for *ACL authors. It
contains instructions for using the LaTeX style files for ACL conferences. The
document itself conforms to its own specifications, and is therefore an
example of what your manuscript should look like. These instructions should be
used both for papers submitted for review and for final versions of accepted
papers.

##  1 Introduction

These instructions are for authors submitting papers to *ACL conferences using
LaTeX. They are not self-contained. All authors must follow the general
instructions for *ACL proceedings,111http://acl-
org.github.io/ACLPUB/docs/formatting.html and this document contains
additional instructions for the LaTeX style files.

The templates include the LaTeX source of this document (acl.tex), the LaTeX
style file used to format it (acl.sty), an ACL bibliography style
(acl_natbib.bst), an example bibliography (custom.bib), and the bibliography
for the ACL Anthology (anthology.bib).

##  2 Engines

To produce a PDF file, pdfLaTeX is strongly recommended (over original LaTeX
plus dvips+ps2pdf or dvipdf). XeLaTeX also produces PDF files, and is
especially suitable for text in non-Latin scripts.

##  3 Preamble

The first line of the file must be

>
>     \documentclass[11pt]{article}
>

To load the style file in the review version:

>
>     \usepackage[review]{acl}
>

For the final version, omit the `review` option:

>
>     \usepackage{acl}
>

To use Times Roman, put the following in the preamble:

>
>     \usepackage{times}
>

(Alternatives like txfonts or newtx are also acceptable.)

Please see the LaTeX source of this document for comments on other packages
that may be useful.

Set the title and author using `\title` and `\author`. Within the author list,
format multiple authors using `\and` and `\And` and `\AND`; please see the
LaTeX source for examples.

By default, the box containing the title and author names is set to the
minimum of 5 cm. If you need more space, include the following in the
preamble:

>
>     \setlength\titlebox{<dim>}
>

where `<dim>` is replaced with a length. Do not set this length smaller than 5
cm.

##  4 Document Body

###  4.1 Footnotes

Footnotes are inserted with the `\footnote` command.222This is a footnote.

###  4.2 Tables and figures

See Table 1 for an example of a table and its caption. Do not override the
default caption sizes.

Command | Output
---|---
`{\"a}` | ä
`{\^e}` | ê
`{\‘i}` | ì
`{\.I}` | İ
`{\o}` | ø
`{\’u}` | ú
`{\aa}` | å

Command | Output
---|---
`{\c c}` | ç
`{\u g}` | ğ
`{\l}` | ł
`{\~n}` | ñ
`{\H o}` | ő
`{\v r}` | ř
`{\ss}` | ß

Table 1: Example commands for accented characters, to be used in, _e.g._ ,
BibTeX entries.

###  4.3 Hyperlinks

Users of older versions of LaTeX may encounter the following error during
compilation:

> `\pdfendlink` ended up in different nesting level than `\pdfstartlink`.

This happens when pdfLaTeX is used and a citation splits across a page
boundary. The best way to fix this is to upgrade LaTeX to 2018-12-01 or later.

###  4.4 Citations

Output | natbib command | Old ACL-style command
---|---|---
Gusfield:97 | `\citep` | `\cite`
Gusfield:97 | `\citealp` | no equivalent
Gusfield:97 | `\citet` | `\newcite`
Gusfield:97 | `\citeyearpar` | `\shortcite`
Table 2:  Citation commands supported by the style file. The style is based on
the natbib package and supports all natbib citation commands. It also supports
commands defined in previous ACL style files for compatibility.

Table 2 shows the syntax supported by the style files. We encourage you to use
the natbib styles. You can use the command `\citet` (cite in text) to get
“author (year)” citations, like this citation to a paper by Gusfield:97. You
can use the command `\citep` (cite in parentheses) to get “(author, year)”
citations Gusfield:97. You can use the command `\citealp` (alternative cite
without parentheses) to get “author, year” citations, which is useful for
using citations within parentheses (e.g. Gusfield:97).

###  4.5 References

The LaTeX and BibTeX style files provided roughly follow the American
Psychological Association format. If your own bib file is named custom.bib,
then placing the following before any appendices in your LaTeX file will
generate the references section for you:

>
>     \bibliographystyle{acl_natbib}
>     \bibliography{custom}
>

You can obtain the complete ACL Anthology as a BibTeX file from
https://aclweb.org/anthology/anthology.bib.gz. To include both the Anthology
and your own .bib file, use the following instead of the above.

>
>     \bibliographystyle{acl_natbib}
>     \bibliography{anthology,custom}
>

Please see Section 5 for information on preparing BibTeX files.

###  4.6 Appendices

Use `\appendix` before any appendix section to switch the section numbering
over to letters. See Appendix A for an example.

##  5 BibTeX Files

Unicode cannot be used in BibTeX entries, and some ways of typing special
characters can disrupt BibTeX’s alphabetization. The recommended way of typing
special characters is shown in Table 1.

Please ensure that BibTeX records contain DOIs or URLs when possible, and for
all the ACL materials that you reference. Use the `doi` field for DOIs and the
`url` field for URLs. If a BibTeX entry has a URL or DOI field, the paper
title in the references section will appear as a hyperlink to the paper, using
the hyperref LaTeX package.

## Acknowledgements

This document has been adapted by Steven Bethard, Ryan Cotterell and Rui Yan
from the instructions for earlier ACL and NAACL proceedings, including those
for ACL 2019 by Douwe Kiela and Ivan Vulić, NAACL 2019 by Stephanie Lukin and
Alla Roskovskaya, ACL 2018 by Shay Cohen, Kevin Gimpel, and Wei Lu, NAACL 2018
by Margaret Mitchell and Stephanie Lukin, BibTeX suggestions for (NA)ACL
2017/2018 from Jason Eisner, ACL 2017 by Dan Gildea and Min-Yen Kan, NAACL
2017 by Margaret Mitchell, ACL 2012 by Maggie Li and Michael White, ACL 2010
by Jing-Shin Chang and Philipp Koehn, ACL 2008 by Johanna D. Moore, Simone
Teufel, James Allan, and Sadaoki Furui, ACL 2005 by Hwee Tou Ng and Kemal
Oflazer, ACL 2002 by Eugene Charniak and Dekang Lin, and earlier ACL and EACL
formats written by several people, including John Chen, Henry S. Thompson and
Donald Walker. Additional elements were taken from the formatting instructions
of the _International Joint Conference on Artificial Intelligence_ and the
_Conference on Computer Vision and Pattern Recognition_.

##  Appendix A Example Appendix

This is an appendix.