| General-purpose | |
| keyword | keyword in a regular Algol-style language |
| built_in | built-in or library object (constant, class, function) |
| type | user-defined type in a language with first-class syntactically significant types, like Haskell |
| literal | special identifier for a built-in value ("true", "false", "null") |
| number | number, including units and modifiers, if any. |
| regexp | literal regular expression |
| string | literal string, character |
| subst | parsed section inside a literal string |
| symbol | symbolic constant, interned string, goto label |
| class | class or class-level declaration (interfaces, traits, modules, etc) |
| function | function or method declaration |
| title | name of a class or a function at the place of declaration |
| params | block of function arguments (parameters) at the place of declaration |
| Meta | |
| comment | comment |
| doctag | documentation markup within comments |
| meta | flags, modifiers, annotations, processing instructions, preprocessor directive, etc |
| meta-keyword | keyword or built-in within meta construct |
| meta-string | string within meta construct |
| Tags, attributes, configs | |
| section | heading of a section in a config file, heading in text markup |
| tag | XML/HTML tag |
| name | name of an XML tag, the first word in an s-expression |
| builtin-name | s-expression name from the language standard library |
| attr | name of an attribute with no language defined semantics (keys in JSON, setting names in .ini), also sub-attribute within another highlighted object, like XML tag |
| attribute | name of an attribute followed by a structured value part, like CSS properties |
| variable | variable in a config or a template file, environment var expansion in a script |
| Markup | |
| bullet | list item bullet in text markup |
| code | code block in text markup |
| emphasis | emphasis in text markup |
| strong | strong emphasis in text markup |
| formula | mathematical formula in text markup |
| link | hyperlink in text markup |
| quote | quotation in text markup |
| CSS | |
| selector-tag | tag selector in CSS |
| selector-id | #id selector in CSS |
| selector-class | .class selector in CSS |
| selector-attr | [attr] selector in CSS |
| selector-pseudo | :pseudo selector in CSS |
| Templates | |
| template-tag | tag of a template language |
| template-variable | variable in a template language |
| diff | |
| addition | added or changed line in a diff |
| deletion | deleted line in a diff |
| ReasonML | |
| operator | reasonml operator such as pipe |
| pattern-match | reasonml pattern matching matchers |
| typing | type signatures on function parameters |
| constructor | type constructors |
| module-access | scope access into a ReasonML module |
| module | ReasonML module reference within scope access |
The language names and aliases table has moved to the project [README](https://github.com/highlightjs/highlight.js)