227 lines
6 KiB
Markdown
227 lines
6 KiB
Markdown
# parse-latin
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[![Build][build-badge]][build]
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[![Coverage][coverage-badge]][coverage]
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[![Downloads][downloads-badge]][downloads]
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[![Size][size-badge]][size]
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Natural language parser, for Latin-script languages, that produces [nlcst][].
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## Contents
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* [What is this?](#what-is-this)
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* [When should I use this?](#when-should-i-use-this)
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* [Install](#install)
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* [Use](#use)
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* [API](#api)
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* [`ParseLatin()`](#parselatin)
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* [Algorithm](#algorithm)
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* [Types](#types)
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* [Compatibility](#compatibility)
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* [Security](#security)
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* [Related](#related)
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* [Contribute](#contribute)
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* [License](#license)
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## What is this?
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This package exposes a parser that takes Latin-script natural language and
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produces a syntax tree.
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## When should I use this?
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If you want to handle natural language as syntax trees manually, use this.
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Alternatively, you can use the retext plugin [`retext-latin`][retext-latin],
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which wraps this project to also parse natural language at a higher-level
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(easier) abstraction.
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Whether Old-English (“þā gewearþ þǣm hlāforde and þǣm hȳrigmannum wiþ ānum
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penninge”), Icelandic (“Hvað er að frétta”), French (“Où sont les toilettes?”),
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this project does a good job at tokenizing it.
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For English and Dutch, you can instead use [`parse-english`][parse-english] and
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[`parse-dutch`][parse-dutch].
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You can somewhat use this for Latin-like scripts, such as Cyrillic (“привет”),
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Georgian (“გამარჯობა”), Armenian (“Բարեւ”), and such.
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## Install
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This package is [ESM only][esm].
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In Node.js (version 16+), install with [npm][]:
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```sh
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npm install parse-latin
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```
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In Deno with [`esm.sh`][esmsh]:
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```js
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import {ParseLatin} from 'https://esm.sh/parse-latin@7'
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```
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In browsers with [`esm.sh`][esmsh]:
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```html
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<script type="module">
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import {ParseLatin} from 'https://esm.sh/parse-latin@7?bundle'
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</script>
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```
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## Use
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```js
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import {ParseLatin} from 'parse-latin'
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import {inspect} from 'unist-util-inspect'
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const tree = new ParseLatin().parse('A simple sentence.')
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console.log(inspect(tree))
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```
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Yields:
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```txt
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RootNode[1] (1:1-1:19, 0-18)
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└─0 ParagraphNode[1] (1:1-1:19, 0-18)
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└─0 SentenceNode[6] (1:1-1:19, 0-18)
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├─0 WordNode[1] (1:1-1:2, 0-1)
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│ └─0 TextNode "A" (1:1-1:2, 0-1)
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├─1 WhiteSpaceNode " " (1:2-1:3, 1-2)
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├─2 WordNode[1] (1:3-1:9, 2-8)
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│ └─0 TextNode "simple" (1:3-1:9, 2-8)
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├─3 WhiteSpaceNode " " (1:9-1:10, 8-9)
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├─4 WordNode[1] (1:10-1:18, 9-17)
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│ └─0 TextNode "sentence" (1:10-1:18, 9-17)
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└─5 PunctuationNode "." (1:18-1:19, 17-18)
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```
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## API
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This package exports the identifier [`ParseLatin`][api-parse-latin].
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There is no default export.
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### `ParseLatin()`
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Create a new parser.
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#### `ParseLatin#parse(value)`
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Turn natural language into a syntax tree.
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###### Parameters
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* `value` (`string`, optional)
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— value to parse
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###### Returns
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Tree ([`RootNode`][root]).
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## Algorithm
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> 👉 **Note**:
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> The easiest way to see how `parse-latin` parses, is by using the
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> [online parser demo][demo], which shows the syntax tree corresponding to
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> the typed text.
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`parse-latin` splits text into white space, punctuation, symbol, and word
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tokens:
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* “word” is one or more unicode letters or numbers
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* “white space” is one or more unicode white space characters
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* “punctuation” is one or more unicode punctuation characters
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* “symbol” is one or more of anything else
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Then, it manipulates and merges those tokens into a syntax tree, adding
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sentences and paragraphs where needed.
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* some punctuation marks are part of the word they occur in, such as
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`non-profit`, `she’s`, `G.I.`, `11:00`, `N/A`, `&c`, `nineteenth- and…`
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* some periods do not mark a sentence end, such as `1.`, `e.g.`, `id.`
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* although periods, question marks, and exclamation marks (sometimes) end a
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sentence, that end might not occur directly after the mark, such as `.)`,
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`."`
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* …and many more exceptions
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## Types
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This package is fully typed with [TypeScript][].
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It exports no additional types.
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## Compatibility
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Projects maintained by me are compatible with maintained versions of Node.js.
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When I cut a new major release, I drop support for unmaintained versions of
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Node.
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This means I try to keep the current release line, `parse-latin@^7`, compatible
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with Node.js 16.
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## Security
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This package is safe.
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## Related
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* [`parse-english`](https://github.com/wooorm/parse-english)
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— English (natural language) parser
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* [`parse-dutch`](https://github.com/wooorm/parse-dutch)
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— Dutch (natural language) parser
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## Contribute
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Yes please!
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See [How to Contribute to Open Source][contribute].
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## License
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[MIT][license] © [Titus Wormer][author]
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<!-- Definitions -->
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[build-badge]: https://github.com/wooorm/parse-latin/workflows/main/badge.svg
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[build]: https://github.com/wooorm/parse-latin/actions
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[coverage-badge]: https://img.shields.io/codecov/c/github/wooorm/parse-latin.svg
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[coverage]: https://codecov.io/github/wooorm/parse-latin
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[downloads-badge]: https://img.shields.io/npm/dm/parse-latin.svg
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[downloads]: https://www.npmjs.com/package/parse-latin
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[size-badge]: https://img.shields.io/badge/dynamic/json?label=minzipped%20size&query=$.size.compressedSize&url=https://deno.bundlejs.com/?q=parse-latin
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[size]: https://bundlejs.com/?q=parse-latin
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[npm]: https://docs.npmjs.com/cli/install
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[demo]: https://wooorm.com/parse-latin/
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[esm]: https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c
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[esmsh]: https://esm.sh
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[typescript]: https://www.typescriptlang.org
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[contribute]: https://opensource.guide/how-to-contribute/
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[license]: license
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[author]: https://wooorm.com
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[nlcst]: https://github.com/syntax-tree/nlcst
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[root]: https://github.com/syntax-tree/nlcst#root
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[retext-latin]: https://github.com/retextjs/retext/tree/main/packages/retext-latin
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[parse-english]: https://github.com/wooorm/parse-english
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[parse-dutch]: https://github.com/wooorm/parse-dutch
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[api-parse-latin]: #parselatin
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