olemus
ISACA Glossary:
andmetele (või teabele) tundlikkustaseme kinnistamine, mille tulemusena spetsifitseeritakse igale liigitustasemele turvameetmed; tasemed kinnistatakse ettemääratud kategooriate põhjal andmetele nende loomisel, muutmisel, rikastamisel, salvestamisel või edastamisel; liigitustase näitab andmete väärtust või tähtsust ettevõttele
= the assignment of a level of sensitivity to data (or information) that results in the specification of cotrols for each level of classification
Levels of sensitivity of data are assigned according to predefined categories as data are created, amended, enhanced, sored or transmitted. The classification level is an indication of the value or importance of the data tothe enterprise.

ülevaateid
https://www.techtarget.com/searchdatamanagement/definition/data-classification
https://kirkpatrickprice.com/blog/classifying-data/
https://en.wikipedia.org/wiki/Data_classification_(data_management)
https://en.wikipedia.org/wiki/Classified_information
https://www.imperva.com/learn/data-security/data-classification/
https://d1.awsstatic.com/whitepapers/compliance/AWS_Data_Classification.pdf
https://www.paloaltonetworks.com/cyberpedia/data-classification

näiteid
https://www.cmu.edu/iso/governance/guidelines/data-classification.html
https://security.berkeley.edu/data-classification-standard