> For the complete documentation index, see [llms.txt](https://docs.decentraland.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.decentraland.org/contributor/contributor-zh/nei-rong/collections.md).
# 集合
集合是一组 [可穿戴物品](/contributor/contributor-zh/nei-rong/shi-ti-lei-xing/wearables.md) 和 [表情动作](/contributor/contributor-zh/nei-rong/shi-ti-lei-xing/emotes.md) ，定义在同一个链下命名空间或链上合约中。
它们并不是 [实体](https://github.com/decentraland/docs/tree/main/contributor/entities.md) 本身，但其单独的物品通常可以通过内容服务器使用以下方式获取： [指针](https://github.com/decentraland/docs/tree/main/contributor/pointers.md).
### URN 和指针
集合通过 URN 标识，它们是其物品 URN 的前缀。URN 共有 4 种通用类型：
* `v1` 包含经基金会批准内容的集合（已弃用）。
* `v2` 包含经社区批准内容的集合。
* `thirdparty` 其物品关联于 Decentraland 之外的 NFT 的集合。
* `链下` 集合，主要包含新头像的默认物品。
{% hint style="info" %}
尽管 `v1` 集合已弃用，今后不会再创建或更新，但它们仍然有效，其物品仍可使用。
{% endhint %}
#### 第 1 版和第 2 版集合
旧的 `v1` 和当前的 `v2` 集合命名空间的 URN 形式相同：
```
urn:decentraland:::
```
例如：
```
# 弃用的 v1 空间中的一个集合：
urn:decentraland:mainnet:collections-v1:DCL Test Masks
# v2 社区批准空间中的一个集合：
urn:decentraland:matic:collections-v2:0x25a1d66891d44cdf7b8c45802489c1dea7aadf8b
```
如果 `:` 段追加到末尾，URN 就会变成指向 [指针](https://github.com/decentraland/docs/tree/main/contributor/pointers.md) 集合内某个物品的指针。请参见 [可穿戴物品指针](/contributor/contributor-zh/nei-rong/shi-ti-lei-xing/wearables.md#pointers) 和 [表情动作指针](/contributor/contributor-zh/nei-rong/shi-ti-lei-xing/emotes.md#pointers) 了解相关信息。
#### 第三方集合
第三方集合，也称为 [关联可穿戴物品](https://github.com/decentraland/docs/tree/main/contributor/wearables-and-emotes/wearables/linked-wearables.md)，与普通可穿戴物品不同，它们绑定的是 Decentraland 之外已有的 NFT。它们允许玩家在游戏内头像上展示自己收藏中的 NFT。
它们的 URN 看起来是这样的：
```
urn:decentraland::collections-thirdparty::
```
你可以在 [关联可穿戴物品](https://github.com/decentraland/docs/tree/main/contributor/wearables-and-emotes/wearables/linked-wearables.md) 创作者文档中找到大量相关信息。
### 发现集合
内容服务器可以使用以下 [`/lambdas/collections`](https://decentraland.github.io/catalyst-api-specs/#tag/Lambdas/operation/getCollections) 端点为你提供所有已知集合的列表。
响应将是一个包含 `collections` 属性的对象，其中包含一个 URN 和名称数组。例如：
```json
{
"collections": [
{
"id": "urn:decentraland:amoy:collections-v2:0xff5d4ebc6bc1ff7262cab42d3c693d953f4614d2",
"name": "冬季服装集合"
},
// ……还有很多
]
}
```
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