OCR
operators.azure.azure_form_recognizer_parser.AzureFormRecognizerParser, operators.ocr.tesseract_featurizer.TesseractFeaturizer...
PDF-based
operators.candidates.rich_doc_features.RichDocRegexNGramDetector, operators.candidates.rich_doc_features.RichDocRegexPageFeaturizer, operators.candidates.rich_d...
Text-based
operators.candidates.context.ContextAggregator, operators.candidates.extractor.DateSpanFeaturizer, operators.candidates.extractor.DocEntityDictSpanFeaturizer, o...