When publishing events to custom topics, create subjects for your events that make it easy for subscribers to know whether they're interested in the event. Subscribers use the subject to filter and route events. Consider providing the path for where the event happened, so subscribers can filter by segments of that path. The path enables subscribers to narrowly or broadly filter events. For example, if you provide a three segment path like `/A/B/C` in the subject, subscribers can filter by the first segment `/A` to get a broad set of events. Those subscribers get events with subjects like `/A/B/C` or `/A/D/E`. Other subscribers can filter by `/A/B` to get a narrower set of events.
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