An entry in the Classifier Block Table describes a single member of a group of the classifiers. Each entry identifies classification data, defined through the Classifier Component Table (ntnClfrComponentTable). Block members are considered unordered for evaluation purposes and can be thought of as being applied 'simultaneously'. All block members must perform classification based on the same set of data. Related entries within this table are linked through a common group identifier. This identifier is used to reference the classification block for a policy through the QoS Policy Table (ntnQosPolicyTable).