# NIP-119: AND Operator in Filters

Enable `AND` within a single tag filter by using an `&` modifier in filters for indexable tags.

```
filters: {
  "kinds": [1],
  "&t": ["meme", "cat"],
  "#t": ["black", "white"]
}
// returns kind `1` events with `t` tags that have both "meme" and "cat" that have the tag "black" or "white"
```

## Rules

- `AND` **MUST** take precedence over `OR`
- Tag values used in `AND` **SHOULD NOT** be used in standard `OR` tags [`#`]
- Any tag value used in `AND` **SHOULD** be ignored in `OR`