开放云计算接口标准（Open Cloud Computing Interface, OCCI）由开放网格论坛（Open Grid Forum, OGF）制定，是一个免费、开放、为社群共同接纳推动，且以云基础架构服务为锁定目标的接口标准。借助该API，数据中心与云伙伴可以免受现有一堆专利或开放云API之间歧异不兼容之苦。
面对云基础架构服务所组成之关键组件，目前OCCI是采用资源导向架构（Resourced Oriented Architecture, ROA）来表示。同时，每个由简洁URI标示的资源可拥有许多不同的描述呈现方式（例如可以超文件来表示）。OCCI工作小组正规划在API中加入许多格式的支持，在初始版本中，Atom/Pub、JSON及Plain Text等标准都被纳入支持行列中。
OCCI会提供对基础架构服务之定义、创建、部署、操作及退出的管理功能。通过简易服务生命周期模型，可支持由云供货商提供的基本通用生命周期状态。在事件中，供货商并不会提供或报告服务生命周期状况，OCCI并不会强制遵行，而是将生命周期模型定义成提议书，供云供货商遵循。
参照OCCI，云计算客户端可启动执行全新应用程序堆栈，并管理其生命周期与其采用的资源。为了执行像是来自SNIA CDMI接口所导出的应用程序堆栈，通过OCCI接口即可分派储存至特定虚拟机。
OCCI is an extensible set of specifications for cloud services management that initially targets the fundamental layer of the cloud stack (IaaS) and can be easily applied to higher levels in the stack (PaaS, SaaS). The specification documents are based upon previously gathered requirements and focus on the important capabilities required to support modern service offerings that are vendor-independent, platform-neutral and can be extended to solve a broad variety of problems in cloud computing.
There are already well over a dozen implementations of OCCI in working software, with other major projects planning to adopt OCCI in the near future. Links to these are available at http://occi-wg.org/community/implementations.
OGF collaborates extensively with other industry associations, and is in advanced conversations with DMTF, SNIA and the Cloud Security Alliance to work on refinements of these and related specifications.
OCCI was developed by the OCCI Working Group (http://occi-wg.org), a chartered group within OGF. OGF is the premier world-wide community for the development and adoption of best practices and standards for grid, cloud, and other applied distributed computing technologies. OGF's open forum and process enable communities of users, infrastructure providers, and software developers from around the globe in research, business and government to work together to address key issues, develop open standards, and promote interoperable solutions.
For more information, contact:
Open Grid Forum (OGF)
Joel Replogle, OGF Executive Director
replogle@ogf.org
+1-765-228-9068
http://www.ogf.org
