| CPC G06F 11/3409 (2013.01) [H04L 67/55 (2022.05)] | 20 Claims |

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1. A data subscription method implemented by a first device, wherein the data subscription method comprises:
generating, based on a capability model template, a first capability model instance, wherein the capability model template comprises one or more metric names, wherein the first capability model instance comprises one or more performance parameters that can be subscribed to by the first device, wherein the one or more performance parameters that can be subscribed to by the first device correspond to the one or more metric names; and
sending the first capability model instance to a network management device,
wherein the first capability model instance is configured to be used by the network management device to select a subset of the one or more performance parameters, and
wherein the capability model template and the first capability model instance comprise one or more metric names corresponding to the one or more performance parameters and indicating group information of the subset of performance parameters.
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