+**B01** commonly identifies the primary designation within a structured [Classification System](/wiki/classification_system), acting as a foundational label. It often signifies the initial entry in a methodical sequence, establishing a baseline for subsequent [System Components](/wiki/system_components).
+## See also
+- [Taxonomy](/wiki/taxonomy)
+- [Nomenclature](/wiki/nomenclature)
+- [Identifier](/wiki/identifier)
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