ISO/IEC 21000-15:20 06规定了一种机制来监控与ISO/IEC 21000-2和同行中定义的数字项目的操作和使用相关联的事件。监控视听数字材料的使用并洞察对等体的状态或容量是许多内容创建、交付、改编和消费应用的重要功能。 ISO/IEC 21000-15:20 06规定了一种动态机制，该机制允许用户在数字项目内创建事件报告请求，然后可以由对等方处理。这样的事件报告请求指定了当事件报告将首先被生成并且然后被发送到(一组)接收对等体时的条件。 ISO/IEC 21000-15:20 06规定了事件报告请求（ER-R）和事件报告的语法和语义。事件报告请求的语法和语义(ER-R) 事件报告请求明确地指定了事件报告必须发送给指定的接收者以及结果事件报告的接收者的性质和条件。ER-R的主要部分是 事件报告请求描述符，其提供关于事件报告请求本身的描述性信息；事件条件描述符，其指定与对等体(例如，其内部时间、状态、技术能力)或数字项目(如果它们已经通过例如使用数字项目处理而被作用)相关并且触发事件报告的创建的一组条件；一种事件报告规范，它定义了生成的事件报告应该如何结构化以及它应该包含什么信息。事件报告的语法和语义 在事件发生时(如由事件报告请求定义的)，对等体将基于事件报告规范中包含的细节生成事件报告。然后可以将事件报告发送给ER-R中指定的接收者。 ISO/IEC 21000-15:20 06进一步规定了自动交换事件报告的机制。例如，事件报告可以嵌入在对等方接收到事件报告时要处理的事件报告请求。该机制允许将事件报告自动转发到另一对等体，或者将接收确认发回给事件报告的始发对等体。

ISO/IEC 21000-15:2006 specifies a mechanism to monitor events associated with the manipulation and usage of Digital Items, as defined in ISO/IEC 21000-2, and Peers. Monitoring the usage of audio-visual digital material and gaining insight into the state or capacity of a Peer is an important functionality for many content creation, delivery, adaptation and consumption applications. ISO/IEC 21000-15:2006 specifies a dynamic mechanism which allows Users to create an Event Report Request within a Digital Item which can then be processed by a Peer. Such an Event Report Request specifies the conditions when an Event Report will be first generated and then sent to a (set of) recipient Peer(s). ISO/IEC 21000-15:2006 specifies the syntax and semantics of Event Report Requests (ER-R) and of Event Reports.

Syntax and semantics of Event Report Requests (ER-R)

Event Report Requests unambiguously specify the nature and conditions under which Event Reports must be sent to the specified recipients, as well as the recipients of the resulting Event Reports. The main parts of an ER-R are

• Event Report Request Descriptors that provides descriptive information about the Event Report Request itself;
• an Event Condition Descriptor that specifies a set of conditions that relate to either a Peer (e.g. it's internal time, status, technical capacity) or a Digital Item (if they have been acted upon by, for example, the use of Digital Item Processing) and that trigger the creation of Event Reports;
• an Event Report Specification that defines how the resulting Event Report should be structured and what information it should contain.

Syntax and semantics of Event Reports

Upon the occurrence of the Event (as defined by the Event Report Request), a Peer will generate an Event Report, based on details contained within the Event Report Specification. The Event Report can then be sent to the recipient(s) as specified in the ER-R. ISO/IEC 21000-15:2006 further specifies mechanisms to automate the exchange of Event Reports. Event Reports may for instance, embed Event Report Requests that are to be processed upon reception of the Event Report by a Peer. This mechanism allows for Event Reports to be automatically forwarded to another Peer, or for sending back an Acknowledgment of Receipt to the Event Report's originating Peer.