Front Matter

Overview

Scholarly articles require much more detail in their front matter than simply a title and an author. Quarto provides a rich set of YAML metadata keys to describe these details. On this page, you’ll learn how to specify authors and their affiliations, article summaries like an abstract and keywords, and how to include information on copyright, licensing and funding.

This YAML header includes examples of all the top level keys discussed on this page:

document.qmd
---
title: "Toward a Unified Theory of High-Energy Metaphysics: Silly String Theory"
date: 2008-02-29
author:
  - name: Josiah Carberry
    id: jc
    orcid: 0000-0002-1825-0097
    email: josiah@psychoceramics.org
    affiliation: 
      - name: Brown University
        city: Providence
        state: RI
        url: www.brown.edu
abstract: > 
  The characteristic theme of the works of Stone is 
  the bridge between culture and society. ...
keywords:
  - Metaphysics
  - String Theory
license: "CC BY"
copyright: 
  holder: Josiah Carberry
  year: 2008
citation: 
  container-title: Journal of Psychoceramics
  volume: 1
  issue: 1
  doi: 10.5555/12345678
funding: "The author received no specific funding for this work."
---

The documents produced by the above metadata for the HTML and JATS formats are shown below.

Screenshot of the JATS preview from the document with the above metadata.

Screenshot of the HTML preview from the document with the above metadata.

Not all of the metadata keys are used in every format. However, the tags described on this page will generally be supported in journal article formats. Currently the JATS format makes use of the broadest set of metadata tags, so if you want to check how things render we recommend previewing with format: jats.

Authors & Affiliations

The simplest way to describe an author is with a string directly to the author key:

---
author: Norah Jones
---

However, the author key has a number of sub-keys that provide the additional detail required for scholarly articles. For instance, you can add an author’s affiliation by using the affiliation key. In the simplest form, an author along with their affiliation can be described by passing a string to each of name and affiliation:

---
author:
  name: Norah Jones
  affiliation: Carnegie Mellon University
---

You can read about the other keys you can provide to author and affiliation in the corresponding Author and Affiliation sections below.

Both author and affiliation can take multiple elements to describe multiple authors, or authors with multiple affiliations. As an example, here is the YAML to describe a document with two authors, the first of which has two affiliations:

---
author:
  - name: Norah Jones
    affiliation: 
      - Carnegie Mellon University
      - University of Chicago
  - name: Josiah Carberry
    affiliation: Brown University
---

Notice that each element of author and affiliation is prefaced by a - and indented appropriately. You can read more about shortcuts to avoid repetition when authors share affiliations in the Multiple Authors section below.

Singular or Plural?

Both of these keys can be specified using a singular (author and affiliation) or plural (authors and affiliations) form.

Author

Beyond name and affiliation, author can also take any of the following:

Available keys to author
email
phone
fax
url		 string Contact details for the author. Converted to hyperlinks in many formats.
degrees string(s) Academic titles or professional certifications displayed following a personal name.
orcid string Author’s Open Researcher and Contributor ID (ORCID), in the form 0000-0000-0000-0000. Creates a link to the author’s ORCID in many formats.
note
acknowledgements		 string Notes to attach to an author, such as contribution details;
Author’s acknowledgements.
roles string(s) Author’s roles. Read more in Author Roles below.
corresponding
equal-contributor
deceased		 true/false Set this author as:
the corresponding author;
as having contributed equally with all other contributors;
and/or deceased.
id string An identifier to be used to refer to this author in other fields. See an example in Funding.

An affiliations-url key can also be provided to author, and will be propagated to the url key of affiliation.

As an example, a more complete description of an author might look like:

---
author:
  - name: Josiah Carberry
    orcid: 0000-0002-1825-0097
    url: https://en.wikipedia.org/wiki/Josiah_S._Carberry
    email: josiah@psychoceramics.org
    corresponding: true
---

Name Components

Quarto will automatically parse the name key into its components. However, if this parsing is incorrect you can specify the components, given, family, dropping-particle, and non-dropping-particle directly, for example:

---
author: 
  - name: 
      given: Charles
      family: Gaulle
      non-dropping-particle: de
  - name: 
      given: Ludwig
      family: Beethoven
      dropping-particle: van
---

Degrees

You may specify degrees or academic titles using the degrees field of authors:

author:
  - name: Josiah Carberry
    degrees: 
      - B.S.
      - PhD

Author Roles

Use roles to describe an author’s contributions to the work. You can use free form text as a string:

author:
  - name: Josiah Carberry
    roles: "Conceived and designed the study, analysed the results and wrote the manuscript."

Or alternatively, make use of the Contributor Roles Taxonomy (CRediT). To use CRediT roles provide one of the 14 contributor roles, e.g.:

author:
  - name: Josiah Carberry
    roles: conceptualization

Or, an array of roles:

author:
  - name: Josiah Carberry
    roles: [investigation, data curation]

Or specify the role along with a degree of contribution:

author:
  - name: Josiah Carberry
    roles: 
      - investigation: lead 
      - data curation: supporting

Affiliation

Like author, you can provide a string is directly to affiliation, as in:

---
author:
  name: Norah Jones
  affiliation: Carnegie Mellon University
---

Alternatively, you can provide the name explicitly to the name key, like:

---
author:
  name: Norah Jones
  affiliation: 
    name: Carnegie Mellon University
---

In addition to name, affiliation can take any of the following:

Available keys to affiliation
department String
group String Team or research group within the affiliation
address
city
region or state
country
postal-code		 String Affiliation’s location. Provide one of region or state, and any combination of the other keys.
url String Affiliation’s website. Converted to a link in many formats.

isni
ringgold
ror
Numeric
Numeric
String		 Affiliation IDs:
16 digit International Standard Name Identifier (ISNI);
4-6 digit Ringgold ID;
Research Organization Registry (ROR) ID, starting with https://ror.org/, followed by a 9 digit alphanumeric identifier.

For example, a more complete affiliation for an author might look like:

---
author:
  name: Josiah Carberry
  orcid: 0000-0002-1825-0097
  url: https://en.wikipedia.org/wiki/Josiah_S._Carberry
  email: josiah@psychoceramics.org
  corresponding: true
  affiliation: 
    - name: Brown University
      department: Psychoceramics
      city: Providence
      state: RI
      country: US
      url: www.brown.edu
      ringgold: 6752
      isni: 0000000419369094
---

Multiple Authors

When there are multiple authors of a document, it is common that they share affiliations. To avoid repeating an affiliation’s details, you can describe an affiliation once, assign it an id, and then refer to the id in other fields.

One approach is to assign an id to each affiliation where they are described within an author. For example, here we assign the author’s affiliations the ids cmu and chicago:

---
author:
  - name: Norah Jones
    affiliation:
      - id: cmu
        name: Carnegie Mellon University
      - id: chicago
        name: University of Chicago
---

Then, when adding additional authors, you can refer to affiliations using ref::

---
author:
  - name: Norah Jones
    affiliation:
      - id: cmu
        name: Carnegie Mellon University
      - id: chicago
        name: University of Chicago
  - name: John Hamm
    affiliation:
      - ref: cmu
---

An alternative approach is to define affiliations at the top level, as opposed to within an author:

---
author:
  - name: Norah Jones
    affiliation:
      - ref: cmu
      - ref: chicago
  - name: John Hamm
    affiliation:
      - ref: cmu
affiliations:
  - id: cmu
    name: Carnegie Mellon University
  - id: chicago
    name: University of Chicago
---

This approach may be more convenient in cases where you also want to refer to affiliations in fields other than author, e.g. funding.

Abstract

You can add an abstract with the abstract key. Since abstracts are generally longer than a line, and may contain markdown, you’ll need to provide it using YAML’s literal block style. That is, place a | on the same line as abstract: and indent your raw abstract text by two spaces.

For example:

---
abstract: |
  This article evaluates novel approaches to do
  some really important things.
---

Keywords

Keywords can be added with keywords:

---
keywords: 
  - open-source 
  - scientific publishing
  - reproducible research
---

License

To specify a license, you can pass a string directly to license:

---
license: "This work is dedicated to the Public Domain"
---

This is equivalent to specifying the text sub-key directly:

---
license:
  text: "This work is dedicated to the Public Domain"
---

You can add additional details by providing the type and url sub-keys:

---
license:
  text: > 
    Permission is granted to copy, distribute and/or 
    modify this document under the terms of the GNU Free 
    Documentation License, Version 1.3 or any later version 
    published by the Free Software Foundation; with no 
    Invariant Sections, no Front-Cover Texts, and no 
    Back-Cover Texts. A copy of the license is included in 
    the section entitled "GNU Free Documentation License
  type: open-access
  url: https://www.gnu.org/licenses/fdl-1.3-standalone.html
---

If you are choosing a Creative Commons license you may simply pass an abbreviation:

---
license: "CC BY"
---

The available abbreviations are covered in the Creative Commons section below.

Creative Commons

The Creative Commons copyright licenses and tools forge a balance inside the traditional “all rights reserved” setting that copyright law creates. These tools give everyone from individual creators to large companies and institutions a simple, standardized way to grant copyright permissions to their creative work.

Here are some of the common forms of Creative Commons content license:

License Name Description
CC BY Attribution This license lets others distribute, remix, tweak, and build upon your work, even commercially, as long as they credit you for the original creation. This is the most accommodating of licenses offered.
CC BY-SA Attribution-ShareAlike This license lets others remix, tweak, and build upon your work even for commercial purposes, as long as they credit you and license their new creations under the identical terms. This license is often compared to “copyleft” free and open source software licenses. All new works based on yours will carry the same license, so any derivatives will also allow commercial use.
CC BY-ND Attribution-NoDerivs This license allows for redistribution, commercial and non-commercial, as long as it is passed along unchanged and in whole, with credit to you.
CC BY-NC Attribution-NonCommercial This license lets others remix, tweak, and build upon your work non-commercially, and although their new works must also acknowledge you and be non-commercial, they don’t have to license their derivative works on the same terms.
CC BY-NC-SA Attribution-NonCommercial-ShareAlike This license lets others remix, adapt, and build upon your work non-commercially, as long as they credit you and license their new creations under the identical terms. |
CC BY-NC-ND Attribution-NonCommercial-NoDerivs This license is the most restrictive of the six main licenses, only allowing others to download your works and share them with others as long as they credit you, but they can’t change them in any way or use them commercially.
CC0 CC0 (aka CC Zero) is a public dedication tool, which enables creators to give up their copyright and put their works into the worldwide public domain. CC0 enables reusers to distribute, remix, adapt, and build upon the material in any medium or format, with no conditions.

If you specify a Creative Commons license for your content, Quarto will automatically include the relevant link to the appropriate license.

Citation

The citation key allows you to specify additional metadata that is used to create a citation for the document. You can read more about this in Creating Citeable Articles.

Funding

The funding key can directly take a string:

---
funding: "The author(s) received no specific funding for this work."
---

This is equivalent to providing the statement sub-key directly:

---
funding: 
  statement: "The author(s) received no specific funding for this work."
---

The funding key can also take the sub-keys source, recipient and investigator. Both recipient and investigator can take a string, or a reference to an author or affiliation using ref:. For example, this front matter adds funding where the investigator is specified using an author id:

---
author:
  - name: Norah Jones
    id: nj
funding:
  - source: "NIH (Grant #: 1-R01-MH99999-01A1)"
    investigator: 
      - ref: nj
---