Patent Document ID: 8380753
Application ID: 13106806

Base Claim:
1. A machine readable medium storing a program which when executed by at least one processing unit analyzes a document comprising a plurality of primitive elements, the program comprising sets of instructions for: identifying aligned gaps in a plurality of text lines in a column of the document; determining which of the aligned gaps are indicative of spacing between a list item label and a list item in order to identify text lines that include the aligned gaps as list items; identifying hierarchical levels for the list items based on alignment, spacing, and content of the list items; and defining a hierarchically-organized set of lists for the column in which list items with the same hierarchical level are in the same list.

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Claim 3:
3. The machine readable medium of claim 1 , wherein the set of instructions for determining which of the aligned gaps are indicative of the spacing between a list item label and a list item comprises a set of instructions for identifying gaps that have a single short word to the left and left-aligned text to the right.