The machine learning extractor is not a generic data extractor - it can ONLY process invoices and receipts, and it only targets the fields described in the release announcement - os it is not at all suitable for your use case.
If you want to extract information as per your case, try using the Abbyy FlexiCapture extractor, if you have a license, or try building your own extractor targeting your required fields. This implies writing custom code for your use case.
The Keyword Based Classifier helps in automatically classifying incoming files, if in the same process you might get multiple document types - eg, you might get invoices, contracts, medical records and you need to extract different data according to the
type of document that is incoming.
The learning file path needs to have at least an empty (but existing) file on disk. This gets automatically written by the Keyword Based Classifier when used inside a Train Classifiers scope.
The training scopes are used to provide classifiers and extractors a means to ingest human feedback, IF and only if they have the feedback ability implemented as a training activity.
Currently the only component capable of learning is the Keyword Based Classifier.
Hope this helps,
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