# @moq/pattern [](https://www.npmjs.com/package/@moq/pattern) [](https://www.typescriptlang.org/) Exact path patterns for [Media over QUIC](https://moq.dev): grammar, matching, and set algebra. A pattern describes a set of broadcast paths. This package provides a shared grammar for tokens, origin scopes, and announce interests. Integrating patterns into those consumers is separate work. Literal paths stay coordinates; `@moq/net`'s path module keeps construction, joins, and prefix operations. `@moq/net` and `@moq/auth` re-export these types. The Rust twin is [`moq-pattern`](https://crates.io/crates/moq-pattern). ```bash npm add @moq/pattern ``` ```ts import { Pattern, Patterns } from "@moq/pattern"; const grant = Pattern.parse("pid/*/chat"); grant.matches("pid/room1/chat"); // true grant.contains(Pattern.parse("pid/room1/chat")); // true const under = Pattern.parse("**/a").rebase("a"); [...under].map((p) => p.text); // ["", "**/a"] ``` See the package docs for the grammar, the CAT/C4M common subset, and the literal-path rollout.