Bowker and Star relocate classification from the margins of information work to the centre of social organisation. Categories, standards and classificatory schemes operate as information infrastructure: they coordinate action precisely because they often disappear into ordinary use. The methodological operation is infrastructural inversion, making visible the decisions, exclusions and ethical consequences sedimented inside apparently technical ordering systems. Classification does not simply sort an already-given world; it helps constitute what can be counted, compared, administered and recognised. This insight bridges science and technology studies, sociology, information studies and institutional analysis. It matters to a critical lexicon because every node, preferred label, author pairing and cross-reference is simultaneously an aid to navigation and a decision about visibility. A concept scheme can therefore never be defended only by consistency. Its categories must remain open to provenance: who named them, what alternatives were suppressed, what communities recognise them and what kinds of inference the resulting structure encourages. Bowker and Star turn metadata from background description into an accountable social act.
