FAIRsharing record for: FAIR Metric – A1.1 – Metadata - HTTP(S) retrieval protocol

This FAIRsharing record describes: ### What is being measured?

This metric evaluates whether the protocol used to retrieve metadata referenced by the provided identifier is either HTTP or HTTPS and therefore openly specified, free to implement, and universally implementable.

### Why should we measure it?

Principle A1.1 requires that metadata be retrievable by an open, free, and universally implementable protocol. The intent is to ensure that access to metadata is not gated by proprietary technologies, non-standardized interfaces, or restrictive licensing that prevents automated integration and universal access. Protocols such as HTTP(S) are the gold standard for this requirement because they are openly specified web standards, free for any developer to implement, and universally supported across virtually all modern software environments and programming languages. Protocols that are closed source or that have royalties associated with them could prevent users from being able to obtain the resource. By mandating these standards, we ensure that metadata remains accessible to the widest possible range of humans, harvesters and research discovery services.

This metric evaluates whether the metadata access protocol satisfies the requirements for open, free, and universal implementation. The evaluation checks for the use of the HTTP or HTTPS protocols.

本FAIRsharing记录旨在说明：
### 本次评估的核心内容是什么？
本指标用于评估：通过给定标识符检索其所引用的元数据（metadata）时所使用的协议，是否为HTTP或HTTPS——此类协议具备公开规范、可免费实现且全局普适的特点。

### 为何需要开展此项评估？
原则A1.1规定，元数据需通过开放、免费且具备全局普适性的协议完成获取。其核心目标在于确保元数据的访问不会被专有技术、非标准化接口，或阻碍自动化集成与全域访问的限制性许可设置壁垒。
HTTP(S)等协议是满足此项要求的金标准，因其属于公开规范的Web标准，可供所有开发者免费实现，且几乎在所有现代软件环境与编程语言中均得到普遍支持。采用闭源或需支付版权使用费的协议，则可能阻碍用户获取相关资源。
通过强制执行此类标准，可确保元数据能够被最广泛的用户群体、元数据采集器（harvesters）与科研发现服务所访问。

本指标用于评估元数据访问协议是否符合开放、免费且普适实现的要求，具体核查是否采用HTTP或HTTPS协议。