# cql2-rs
**cql2-rs** is [Python package](./python.md), [command-line interface (CLI)](./cli.md), and [Rust crate](https://docs.rs/cql2) for parsing, validating, and converting [Common Query Language (CQL2)](https://www.ogc.org/standard/cql2/).
## Python
```python
>>> from cql2 import Expr
>>> expr = Expr("landsat:scene_id = 'LC82030282019133LGN00'")
>>> expr.to_json()
{'op': '=', 'args': [{'property': 'landsat:scene_id'}, 'LC82030282019133LGN00']}
```
## Javascript
```js
> import init, { Expr } from 'cql2-wasm';
> await init(); // the published package is a `--target web` build
> const expr = new Expr("landsat:scene_id = 'LC82030282019133LGN00'");
> expr.to_json() // a JSON string, not an object
'{"op":"=","args":[{"property":"landsat:scene_id"},"LC82030282019133LGN00"]}'
```
## CLI
```shell
$ cql2 < examples/text/example01.txt # will succeed if the CQL2 is valid
landsat:scene_id = 'LC82030282019133LGN00'
```
## Rust
```rust
use cql2::Expr;
let expr: Expr = "landsat:scene_id = 'LC82030282019133LGN00'".parse().unwrap();
let json = expr.to_json().unwrap();
```
