26. A system for generating feature graphs employed for creation of a headnote in a legal document, the system comprising: a feature identification module configured to identify one or more predetermined features in a plurality of legal documents, wherein the one or more predetermined features are based on grammatical constituents of text in the legal document and further wherein the feature identification module receives the plurality of legal documents manually identified as headnote and non headnote from a user interface; a feature availability computing module configured to: obtain data related to the availability of the one or more identified predetermined features in the sentences manually identified as headnote and non headnote in the plurality of legal documents; and store the obtained data in a repository; and a feature graph generating module configured to: compute likelihood of a sentence being a headnote based on the data stored in the repository; generate feature graphs corresponding to each predetermined feature based on the computed likelihood and stored data; and store the generated feature graphs in the repository.
26. A system for generating feature graphs employed for creation of a headnote in a legal document, the system comprising: a feature identification module configured to identify one or more predetermined features in a plurality of legal documents, wherein the one or more predetermined features are based on grammatical constituents of text in the legal document and further wherein the feature identification module receives the plurality of legal documents manually identified as headnote and non headnote from a user interface; a feature availability computing module configured to: obtain data related to the availability of the one or more identified predetermined features in the sentences manually identified as headnote and non headnote in the plurality of legal documents; and store the obtained data in a repository; and a feature graph generating module configured to: compute likelihood of a sentence being a headnote based on the data stored in the repository; generate feature graphs corresponding to each predetermined feature based on the computed likelihood and stored data; and store the generated feature graphs in the repository. 27. The system of claim 26 , wherein the one or more predetermined features comprise at least one of: a proper noun feature, a date feature, a provenance feature, a sentence complexity feature, a sentence structure feature, a syntactic structure feature, an abstract-entity extraction feature, a comma feature, an ellipses feature, a colon feature, a see or cite or refer feature, a versus feature, a statute and precedence feature, a sentence position feature and a document structure feature.