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Mastering Internet of Things by Peter Waher

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Identifying things

While we have worked with standalone things (each one identified using a single XMPP address called a JID), generic things on the XMPP network, as registered in a Thing Registry, can be addressed using one, two, three, or four parameters, depending on the size of the host publishing the interface to the thing:

JID

XMPP address of device.

Node ID

Address of virtual node inside device.

Source ID

Larger devices might divide their nodes into sets, called data sources. Node identities are unique within their data source, if specified.

Partition

Large data sources might be further partitioned into subsets. If this is the case, it is the triplet (node ID, data source ID, partition) that is considered unique. ...

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