Schema-Informed Extraction for Unstructured Data

A system for extracting data from documents, the system comprising:

• a storage device configured to store program instructions;
• and
• one or more processors operably connected to the storage device and configured to execute the program instructions to cause the system to:
• receive input of a number of documents;
• receive input of a schema of data items available for extraction from the documents;
• parse the documents into a machine-readable representation;
• identify data items in the machine-readable representation according to the schema;
• propagate interpretations of data items within the documents to disambiguate identified data items;
• match identified data items with other data items in the documents according to the schema;
• and
• extract only identified data items that include a minimal set of interpretations specified by the schema.

A computer program product for extracting data from documents, the computer program product comprising:

• a non-volatile computer readable storage medium having program instructions stored thereon to perform the steps of:
• receiving input of a number of documents;
• receiving input of a schema of data items available for extraction from the documents;
• parsing the documents into a machine-readable representation;
• identifying data items in the machine-readable representation according to the schema;
• propagating interpretations of data items within the documents to disambiguate identified data items;
• matching identified data items with other data items in the documents according to the schema;
• and
• extracting only identified data items that include a minimal set of interpretations specified by the schema.