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The occupational profiling system driven by the traditional survey method has some shortcomings such as lag in updating, time consumption and laborious revision. It is necessary to refine and improve the traditional occupational portrait system through dynamic occupational information. Under the circumstances of big data, this paper showed the feasibility of vocational portraits driven by job advertisements with data analysis and processing engineering technicians (DAPET) as an example. First,doi:10.1371/journal.pone.0253308 pmid:34157028 pmcid:PMC8219172 fatcat:c27untq5cvc6xnxqnprufkvmme