Method and system for identifying citations within regulatory content

A system for identifying citations within regulatory content based on image data representing the regulatory content, the system comprising:

• a token mapper operably configured to:
• receive a language embedding including a plurality of tokens representing words or characters in the regulatory content;
• and
• generate a token mapping associating each of the tokens with a portion of the image data representing the regulatory content;
• a citation classifier operably configured to receive the plurality of tokens and the token mappings at an input of a citation classifier, the citation classifier having been trained to generate a classification output for each of the tokens based on the language embedding and the token mapping of that token, wherein the classification output identifies a plurality of citation tokens within the tokens;
• a hierarchical relationship classifier operably configured to process the tokens based on the classification output of each of the tokens to determine a hierarchical relationship between the tokens, the hierarchical relationship being established based at least in part on the token mapping for at least some of the tokens,
• wherein the hierarchical relationship classifier is operably configured to process the tokens based on the classification output of each of the tokens by processing the plurality of citation tokens to determine the hierarchical relationship between the plurality of citation tokens;
• and
• wherein the hierarchical relationship classifier comprises a sibling classifier and is operably configured to process the plurality of citation tokens by receiving pairwise combinations of citation tokens at an input of the sibling classifier, the sibling classifier having been trained to output a probability indicative of whether each pairwise combination of citation tokens have a common hierarchical level;
• and
• one or more processor circuits having a memory for storing codes, the codes being operable to direct the one or more processor circuits to implement each of the token mapper, the citation classifier, and the hierarchical relationship classifier.