dot. For
instance, to highlight comments differently per language: >vim

    hi @comment.c guifg=Blue
    hi @comment.lua guifg=DarkBlue
    hi link @comment.documentation.java String
<
The following is a list of standard captures used in queries for Nvim,
highlighted according to the current colorscheme (use |:Inspect| on one to see
the exact definition):

@variable                       various variable names
@variable.builtin               built-in variable names (e.g. `this`, `self`)
@variable.parameter             parameters of a function
@variable.parameter.builtin     special parameters (e.g. `_`, `it`)
@variable.member                object and struct fields

@constant               constant identifiers
@constant.builtin       built-in constant values
@constant.macro         constants defined by the preprocessor

@module                 modules or namespaces
@module.builtin         built-in modules or namespaces
@label                  `GOTO` and other labels (e.g. `label:` in C), including heredoc labels

@string                 string literals
@string.documentation   string documenting code (e.g. Python docstrings)
@string.regexp          regular expressions
@string.escape          escape sequences
@string.special         other special strings (e.g. dates)
@string.special.symbol  symbols or atoms
@string.special.path    filenames
@string.special.url     URIs (e.g. hyperlinks)

@character              character literals
@character.special      special characters (e.g. wildcards)

@boolean                boolean literals
@number                 numeric literals
@number.float           floating-point number literals

@type                   type or class definitions and annotations
@type.builtin           built-in types
@type.definition        identifiers in type definitions (e.g. `typedef <type> <identifier>` in C)

@attribute              attribute annotations (e.g. Python decorators, Rust lifetimes)
@attribute.builtin      builtin annotations (e.g. `@property` in Python)
@property               the key in key/value pairs

@function               function definitions
@function.builtin       built-in functions
@function.call          function calls
@function.macro         preprocessor macros

@function.method        method definitions
@function.method.call   method calls

@constructor            constructor calls and definitions
@operator               symbolic operators (e.g. `+`, `*`)

@keyword                keywords not fitting into specific categories
@keyword.coroutine      keywords related to coroutines (e.g. `go` in Go, `async/await` in Python)
@keyword.function       keywords that define a function (e.g. `func` in Go, `def` in Python)
@keyword.operator       operators that are English words (e.g. `and`, `or`)
@keyword.import         keywords for including or exporting modules (e.g. `import`, `from` in Python)
@keyword.type           keywords describing namespaces and composite types (e.g. `struct`, `enum`)
@keyword.modifier       keywords modifying other constructs (e.g. `const`, `static`, `public`)
@keyword.repeat         keywords related to loops (e.g. `for`, `while`)
@keyword.return         keywords like `return` and `yield`
@keyword.debug          keywords related to debugging
@keyword.exception      keywords related to exceptions (e.g. `throw`, `catch`)

@keyword.conditional         keywords related to conditionals (e.g. `if`, `else`)
@keyword.conditional.ternary ternary operator (e.g. `?`, `:`)

@keyword.directive           various preprocessor directives and shebangs
@keyword.directive.define    preprocessor definition directives

@punctuation.delimiter  delimiters (e.g. `;`, `.`, `,`)
@punctuation.bracket    brackets (e.g. `()`, `{}`, `[]`)
@punctuation.special    special symbols (e.g. `{}` in string interpolation)

@comment                line and block comments
@comment.documentation  comments documenting code

@comment.error          error-type comments (e.g. `ERROR`, `FIXME`, `DEPRECATED`)
@comment.warning