ECUs shall distribute available Service Instances and Service Instances needed as well as the Eventgroups of these Service Instances. For this purpose, they exchange entries using Service Discovery messages. This chapter describes how these entries are encoded to offer and find services as well as find and subscribe Eventgroups. ECU应分发已有的的Service Instances和所需的Service Instances以及包含这些Service Instances的Eventgroup。 为此，他们使用Service Discovery消息来交换entry。 本章介绍如何对这些条目进行编码以offer和find服务以及find和subscribe 这些Eventgroups。
The following overview table shows to which value the Type field and the TTL field have to be set: 以下概览表显示了Type字段和TTL字段必须设置为哪个值：
