"tax": {
                            "title": "Tax",
                            "anyOf": [{"type": "number"}, {"type": "null"}],
                        },
                        "tags": {
                            "title": "Tags",
                            "uniqueItems": True,
                            "type": "array",
                            "items": {"type": "string"},
                            "default": [],

@app.get("/users/", tags=["users"])
async def get_users():
    return [{"name": "Harry"}, {"name": "Ron"}]


@app.get("/items/", tags=["items"])
async def get_items():

)

// And - a tag to combine a prefix and multiple tags for replication configuration rule.
type And struct {
	XMLName xml.Name `xml:"And" json:"And"`
	Prefix  string   `xml:"Prefix,omitempty" json:"Prefix,omitempty"`
	Tags    []Tag    `xml:"Tag,omitempty" json:"Tag,omitempty"`
}

var errDuplicateTagKey = Errorf("Duplicate Tag Keys are not allowed")

// isEmpty returns true if Tags field is null
func (a And) isEmpty() bool {

		return false
	}

	if len(ef.Tags) > 0 && !obj.DeleteMarker {
		// Only parse object tags if tags filter is specified.
		var tagMap map[string]string
		if len(obj.UserTags) != 0 {
			t, err := tags.ParseObjectTags(obj.UserTags)
			if err != nil {
				return false
			}
			tagMap = t.ToMap()
		}

		for _, kv := range ef.Tags {
			// Object (version) must match all tags specified in
			// the filter

  type: KClass<T>,
  tag: T?,
) = apply {
  if (tag == null) {
    if (tags.isNotEmpty()) {
      (tags as MutableMap).remove(type)
    }
  } else {
    val mutableTags: MutableMap<KClass<*>, Any> =
      when {
        tags.isEmpty() -> mutableMapOf<KClass<*>, Any>().also { tags = it }
        else -> tags as MutableMap<KClass<*>, Any>
      }
    mutableTags[type] = tag
  }
}

                    tags.add(searchFieldLog.getSecond());
                } else if (roleFieldNameSet.contains(name)) {
                    roles.add(searchFieldLog.getSecond());
                }
            }

            final String virtualHost = searchLog.getVirtualHost();
            if (virtualHost != null) {
                tags.add(virtualHost);
            }

                        "tags": {
                            "items": {"type": "string"},
                            "type": "array",
                            "title": "Tags",
                            "default": [],
                        },
                    },
                    "type": "object",
                    "required": ["subname", "sub_description", "tags"],
                    "title": "SubItem",

				return
			}
		case "Tags":
			var zb0002 uint32
			zb0002, err = dc.ReadArrayHeader()
			if err != nil {
				err = msgp.WrapError(err, "Tags")
				return
			}
			if cap(z.Tags) >= int(zb0002) {
				z.Tags = (z.Tags)[:zb0002]
			} else {
				z.Tags = make([]BatchJobKV, zb0002)
			}
			for za0001 := range z.Tags {
				err = z.Tags[za0001].DecodeMsg(dc)
				if err != nil {

    price: float
    tax: float | None = None
    tags: set[str] = set()


@app.post("/items/", response_model=Item, tags=["items"])
async def create_item(item: Item):
    return item


@app.get("/items/", tags=["items"])
async def read_items():
    return [{"name": "Foo", "price": 42}]


@app.get("/users/", tags=["users"])
async def read_users():

!!! tip
    You don't have to add metadata for all the tags that you use.

### Use your tags

Use the `tags` parameter with your *path operations* (and `APIRouter`s) to assign them to different tags:

```Python hl_lines="21  26"
{!../../../docs_src/metadata/tutorial004.py!}
```

!!! info
    Read more about tags in [Path Operation Configuration](path-operation-configuration.md#tags){.internal-link target=_blank}.

### Check the docs