For users wanting to update their copy of IMF datasets from the IMF Data services we advise users to check and compare the “Latest Update Date” for the dataset with the date they have downloaded the data last time. The date is available in the data structure of the corresponding dataset as highlighted in the examples below: 

/Structure/KeyFamilies/KeyFamily/Annotations/Annotation/AnnotationText[../AnnotationTitle/text()= "Latest Update Date"]/text()

SDMX 2.0 DSD (XML):

SDMX 2.0 DSD (JSON):

SDMX 2.1 DSD: