I'm not sure exactly what sort of answer you are expecting. Unless the data you want is in a standardized format (such as a standardized XML schema), any effort

I'm not sure exactly what sort of answer you are expecting. Unless the data you want is in a standardized format (such as a standardized XML schema), any effort to extract data would require writing custom parsers for each set of data that has a different structure. I'm not sure if you are asking for advice on which technology stack to use for writing this or are looking for a pre-made tool that can extract this for you? There may be some tools that can "attempt" to do this without requiring you to write custom code but I am not sure how effective they would be.