Struct HeadMeta 

pub struct HeadMeta {
    pub declared: Vec<(String, Vec<String>)>,
    pub title: Option<String>,
    pub description: Option<String>,
    pub author: Option<String>,
    pub category: Option<String>,
    pub tags: Vec<String>,
    pub published: Option<Value>,
    pub modified: Option<Value>,
}

What a document declares about itself, in a standard vocabulary its format provides — HTML’s <head> (the meta name/property pairs, title, the lang attribute, the canonical link, rel="tag" links) and a schema.org JSON-LD block. Two layers: every declaration lands verbatim under ::::name (::::description, ::::og:type, ::::article:section, ::::schema:@type), so nothing a page says is lost; and the standard vocabularies feed a curated core — the tags (keywords, article:tag, rel=tag, JSON-LD keywords) become traits on the document and ::tags, the one classification (article:section / articleSection) becomes ::category and a trait too, description, author, and the published / modified instants. Declared identity only: a format adapter reads a cited vocabulary, never a class name or a layout.

Fields

declared: Vec<(String, Vec<String>)>

Every declaration, name → values, in document order; a repeated name accumulates.

title: Option<String>

description: Option<String>

author: Option<String>

category: Option<String>

The one classification (a section of the site, a category).

tags: Vec<String>

The tags, as written, first appearance wins.

published: Option<Value>

modified: Option<Value>

Implementations

impl HeadMeta

pub fn declare(&mut self, name: &str, value: &str)

Record a declaration verbatim (the lossless layer).

pub fn tag(&mut self, tag: &str)

Add a tag unless already present (case-insensitively).

pub fn declared_value(&self, name: &str) -> Option<Value>

A declaration’s value: the string when declared once, the list when repeated.

pub fn trait_name(s: &str) -> String

The trait spelling of a tag or category: as declared, case kept, with runs of anything a name cannot carry (spaces, slashes, parentheses) collapsed to one dash — Execution Model is <tag:Execution-Model>, now() is <tag:now>.

Trait Implementations

impl Clone for HeadMeta

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for HeadMeta

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for HeadMeta

fn default() -> Self

Returns the “default value” for a type.