{{/* Page Front Matter */}}
{{"https://gohugo.io/content-management/front-matter/#front-matter-variables" | markdownify }}

{{`Predefined => case sensitive`}}
aliases         : {{ .Aliases       }}
date            : {{ .Date          }}
description     : {{ .Description   }}
draft           : {{ .Draft         }}
expiryDate      : {{ .ExpiryDate    }}
keywords        : {{ .Keywords      }}
layout          : {{ .Layout        }}
lastmod         : {{ .Lastmod       }}
linkTitle       : {{ .LinkTitle     }}
markup          : {{ .Markup        }}
publishDate     : {{ .PublishDate   }}
slug            : {{ .Slug          }}
title           : {{ .Title         }}
type            : {{ .Type          }}
weight          : {{ .Weight        }}

{{`not exported:`}}
outputs
isCJKLanguage

{{`terms (taxonomy) via .Params`}}
.Params.tags    : {{ .Params.tags }}

{{`User-Defined, not case sensitive, Anything => .Params.anything`}}
.Params.FooBar  : {{ .Params.FooBar }}
.Params.foobar  : {{ .Params.foobar }}
.Params.FOOBAR  : {{ .Params.FOOBAR }}

.Param `FooBar`  : {{ .Param `FooBar` }}
.Param `foobar`  : {{ .Param `foobar` }}
.Param `FOOBAR`  : {{ .Param `FOOBAR` }}

$.Page.Params.FooBar  : {{ $.Page.Params.FooBar }}
$.Page.Params.foobar  : {{ $.Page.Params.foobar }}
$.Page.Params.FOOBAR  : {{ $.Page.Params.FOOBAR }}

{{`has to be lowercase`}}
index .Params `FooBar`  : {{ index .Params `FooBar` }}
index .Params `foobar`  : {{ index .Params `foobar` }}
index .Params `FOOBAR`  : {{ index .Params `FOOBAR` }}

{{`it is stored in lowercase:`}}
{{printf "%v\n" .Params }}

https://gohugo.io/content-management/front-matter/#front-matter-variables

Predefined => case sensitive
aliases         : [alias1 alias2]
date            : 2018-05-09 23:55:57 +0200 CEST
description     : description
draft           : false
expiryDate      : 2042-01-27 18:18:13 +0100 CET
keywords        : [foo bar]
layout          : variables/page_front_matter
lastmod         : 2018-05-12 00:10:52 +0200 CEST
linkTitle       : linkTitle
markup          : markdown
publishDate     : 2018-01-27 18:19:05 +0100 CET
slug            : FrontMatterVariables
title           : Title
type            : examples
weight          : 150

not exported:
outputs
isCJKLanguage

terms (taxonomy) via .Params
.Params.tags    : [foo bar]

User-Defined, not case sensitive, Anything => .Params.anything
.Params.FooBar  : hello world
.Params.foobar  : hello world
.Params.FOOBAR  : hello world

.Param `FooBar`  : hello world
.Param `foobar`  : hello world
.Param `FOOBAR`  : hello world

$.Page.Params.FooBar  : hello world
$.Page.Params.foobar  : hello world
$.Page.Params.FOOBAR  : hello world

has to be lowercase
index .Params `FooBar`  : 
index .Params `foobar`  : hello world
index .Params `FOOBAR`  : 

it is stored in lowercase:
map[slug:FrontMatterVariables description:description keywords:[foo bar] draft:false date:2018-05-09 23:55:57 +0200 CEST publishdate:2018-01-27 18:19:05 +0100 CET tags:[foo bar] weight:150 title:Title iscjklanguage:false lastmod:2018-05-12 00:10:52 +0200 CEST expirydate:2042-01-27 18:18:13 +0100 CET markup:md outputs:[{HTML text/html+html  index canonical  false true false false}] layout:variables/page_front_matter foobar:hello world linktitle:linkTitle aliases:[alias1 alias2]]