Block Model
Every Markdown element becomes a Block:
#![allow(unused)]
fn main() {
struct Block {
id: u32,
document_id: u32,
block_type: BlockType, // Heading, Paragraph, Code, List, …
content: String,
span: Option<Span>, // line/column for editor sync
pre: u32, // interval index pre-order
post: u32, // interval index post-order
properties: Properties, // row-polymorphic extra attributes
}
}properties is row-polymorphic: different block_types carry different keys.
| Block type | Properties |
|---|---|
Heading | { "depth": 2, "slug": "architecture" } |
Code | { "lang": "rust", "meta": "no_run" } |
List | { "ordered": false, "level": 1, "checked": null } |
Yaml / Toml | parsed front-matter keys ("title", "tags", …) |
Block types
BlockType covers every CST node mq-markdown produces:
Heading, Paragraph, Code, List, TableCell, TableRow, TableAlign, Blockquote, HorizontalRule, Html, Yaml, Toml, Math, Definition, Footnote.
In SQL, block_type is exposed as the lowercase, snake_case string form (e.g. 'table_cell', 'horizontal_rule').
See Storage Format for the exact on-disk wire encoding of a Block and its properties.