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No, Lightstreamer Server only manages the items currently requested by some client.
This means that it demands to the Data Adapter the job of filtering the feed flow. The Server issues "subscribe"...

Your client subscribes to 2 items, named QCLZ8 and QNGZ8.
Assuming that your Metadata Adapter is a LiteralBasedProvider, your Data Adapter should receive two subscription calls, related to the above...