Planet RDF聚集部分的代码相对比较简单,依次注册清单中的每一个rss提要,获取每个RSS条目的键值,并保存所有条目的变化。
The aggregation part of the Planet RDF code is relatively simple: it regularly polls each RSS feed in the list, derives a unique key for an RSS item, and stores changes to each item.
内容列表对负载进行解析,并使用键值与存储搜索标准进行比较。
The content list parses the payload and USES the key values to compare with the stored search criteria.
关联谓词通常将事件中的某个键值(例如唯一旅行标识符)与包含相同键的度量作比较。
Correlation predicates typically compare some key value in the event, such as a unique trip identifier, with a metric containing the same key.
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