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Definition of concepts

Archive
Centre that houses historical content, with somebody effectively in charge of the same and that orders and regulates access and consultation of the content placed at the service of researchers, whatever its administrative dependence.

Methodological aspects

Unavailable information is represented using the symbol ":". When the value is lower than that of the minimum unit to be able to estimate the statistical operation or if it effects statistical confidentiality, the symbol used is "..".